Flame Photometric Method Research Articles

Evaluation of the Fertility Status of Rice Fields in Giri Jaya Village, Nagrak District, Sukabumi Regency

The research comprises three stages, which include: Field research, Laboratory research, encompassing the analysis of soil chemical properties. Data analysis, conducted both descriptively and quantitatively. Composite soil samples from rice fields were collected at three different elevations (top, middle, and bottom) at a depth of 1-20 cm in the surface layer of the rice field soil. Analysis of paddy soil samples involved measuring pH H2O using the electrometric method, total N, and cation exchange capacity (CEC) using the titrimetric method, potential K2O using the flame photometric method, potential P2O5 and organic C using the spectrophotometric method, K exchangeability and Na exchangeability using the flame photometric method, and Ca exchangeability and Mg exchangeability using the AAS method. Data obtained from soil analysis at different elevations were compared based on soil type for each observed parameter. The research results indicate that the evaluation of nutrient status is influenced by altitude. Land situated at lower elevations exhibits better soil fertility status, followed by land at the upper and middle elevations.

A Portable Determination Method for the Soil Rapid Available Potassium via Enhanced NaBPh4 Turbidimetry

ABSTRACT Monitoring soil rapidly available potassium (RAK) reserves is extremely significant for developing precise fertilizer recommendations. The sodium tetraphenylborate (NaBPh4)-spectrophotometer method is applied to the detection of soil RAK content as a speedy, efficient and portable approach. However, the detection accuracy of this method is inferior to the ammonium acetate (NH4OAc)-flame photometer method. Here, the detection processes of the NaBPh4 turbidimetry were optimized to find the correlation with the NH4OAc method, further discussed the reasons for the different results by the two methods. The maximum relative error is 13% after conversion through the calibration curve. In addition, the accuracy of the calibration curve was verified by selecting non-fitting soil samples from two experimental sites. Therefore, our work proposes that the NaBPh4 turbidimetry, more convenient and rapid, can accurately detect the soil RAK content in the field. It provides an experimental guidance for the detection method of soil RAK content based on ultraviolet detection and on-site rapid detection devices.

Suitability Analysis of Drinking Water from The Springs of Deumai Watershed Ilam, Nepal

Spring is one of the major sources of drinking water in hilly and Himalayan region. The overall purpose of this study was to analyse the suitability of drinking water by studying the physicochemical properties. Springs of Deumai watershed Ilam, Nepal was investigated for water samples and the physicochemical parameters studied were TDS, pH, temperature, total hardness, alkalinity, total iron and major ion concentrations (Na+, K+, Mg2+, Ca2+, Cl–, SO42–, NO­3–) to describe the water’s chemical characteristics. The physical parameters were determined using pH meter, laboratory thermometer etc. The determination of concentration of chemical parameters was performed by using spectrophotometric method, flame photometric method and titration method. The average pH was found 7.47 and average temperature was found to be 19.4ºC. The dominance trend for major cations was Ca2+ > Na+ > Mg2+ > K+ > Fe and for anions was HCO3– > Cl– > NO3– > SO42–. All the values obtain were within the range specified by WHO and NDWQS guidelines of drinking water. According to the findings and comparison with the guidelines of drinking water given by World Health Organization (WHO) and National Drinking Water Quality Standard (NDWQS), the water quality for drinking water was found within the standards set by them.

Proximate composition and mineral profile of elephants forages in the Savannah ecological zone of Ghana

ABSTRACT This study evaluated the proximate and mineral composition of various parts of Balanites aegyptiaca, Mitragyna inermis, Cassia sieberiena, Kigelia africana, Detarium microcarpum, Terminalia laxiflora, Ficus platyphylla and Climber plant (Liana) as feeds of elephants in the savannah ecological zone of Ghana. The proximate composition was carried out using the methods of the Association of official analytical chemists (AOAC) and the mineral profiles were determined by atomic absorption and flame photometric methods. The highest content of Crude Protein, Crude Fibre, Ash, Moisture and Nitrogen free extract were 12.0% ± 0.01, 15.3% ± 0.01, 14.6% ± 0.0, 7.5% ± 0.01, 76.6% ± 0.01 for Ficus platyphylla, Tamarindus indica, Balanites aegyptiaca and Detarium microcarpum, respectively. The mineral profiling also found appreciable levels of Ca, Mg, P, K, Na, Zn, Cu, Fe, Se and Mn at concentrations (mg/kg) of 4.6 ± 0.00, 0.4 ± 0.01, 0.4 ± 0.01, 5.1 ± 0.01, 0.11 ± 0.01, 1.07 ± 0.008, 0.25 ± 0.005, 0.063 ± 0.0005, 37.48 ± 0.001 for Ficus platyphylla bark, Liana, Terminalia laxiflora bark and leaves, Mitragyna inermis bark, Terminalia laxiflora leaves and Mitragyna inermis leaves, respectively. Presentation of the presence of these important nutrients would be a guide to zoo managers and wildlife practitioners on the best quality of feeds to select for wild elephants.

Prolonged action fertilizer encapsulated by CMC/humic acid

Abstract The present study focuses on the evaluation of a novel prolonged action fertilizer that has been encapsulated by a combination of carboxymethyl cellulose (CMC) and humic acid (HA). The aim of this research was to investigate the release of the essential plant nutrients: phosphorus, nitrogen, and potassium. This study investigated the material composition and nutrient release properties of a novel prolonged action fertilizer encapsulated by CMC and HA. The release of these nutrients was determined by quantifying their concentrations over time using various analytical techniques, such as photometric, titrimetric, and flame photometric methods. The results revealed that the CMC/HA matrix effectively controlled the nutrient release, with extended-release durations observed under acidic (pH 5.0) and neutral (pH 7.0) conditions compared to alkaline environments (pH 8.5). This indicates that the encapsulated fertilizer is well suited for a variety of soil pH conditions, particularly in acidic and neutral soils. This information could have important implications for the development of more sustainable and environmentally friendly fertilizer technologies.

Phytochemical Screening, Antibacterial, Antifungal, Anti-Biofilm and Antioxidant Activity of Azadiracta Indica A. Juss. Flowers.

The present study involves investigation of Azadiracta Indica flowers with respect to its pharmacognostic properties, phytochemical screening, and its application as anti-oxidant, anti-biofilm, and anti-microbial agent. The Pharmacognostic characteristics were evaluated with respect to moisture content, total ash content, acid, and water-soluble ash content, swelling index, foaming index, and metal content. The macro and micronutrient content of the crude drug was estimated by AAS and Flame photometric methods and it gives the quantitative estimation of minerals, where calcium is present in abundance (88.64 mg/L). Soxhlet extraction was carried out in the increasing order of polarity of the solvent viz Petroleum Ether (PE), Acetone (AC), and Hydroalcohol (20 %) (HA) to extract the bioactive compounds. The characterization of the bioactive compounds of all the three extract have been carried out using gcms and lcms. The presence of 13 major compounds have been identified in PE extract and 8 compounds in AC extract using gcms studies. The HA extract is found to contain polyphenols, flavanoids, and glycosides. The antioxidant activity of the extracts was evaluated by DPPH, FRAP, and Phosphomolybdenum assay. This reveals that HA extract shows good scavenging activity than PE and AC extracts which is well correlated with the bioactive compounds, especially phenols which are present as a major component in the extract. The anti-microbial activity was investigated via Agar well diffusion method for all the extracts. Among all the extracts HA extract shows good antibacterial activity with MIC of 25 μg/mL and AC extract shows good anti-fungal activity with MIC of 25 μg/mL. The antibiofilm assay confirms that the HA extract shows good biofilm inhibition about 94 % among other extracts when tested on human pathogens. The results confirm that the HA extract of A. Indica flowers will be an excellent source of natural anti-oxidant and also antimicrobial agents. This paves the way for its potential uses in herbal product formulation.

Partition Management of Soil Nutrients Based on Capacitive Coupled Contactless Conductivity Detection

A method based on capacitively coupled contactless conductivity detection (C4D), which has been proven effective for the rapid detection of available soil potassium content, was firstly proposed to apply to soil nutrient detection. By combining a detection signal spectrum analysis, geographic information system (GIS) data, and a cluster analysis, a soil nutrient management system to match the detection device was developed. This system included six modules: soil sample information management, electrophoresis analysis, quantitative calculation, nutrient result viewing, cluster analysis, and nutrient distribution map generation. The soil samples, which were collected from an experimental field in Xuchang City of Henan Province, were analyzed using the C4D and flame photometer methods. The results showed that the detection results for the soil samples obtained via the two methods were in good agreement. C4D technology was feasible for the detection of the soil available nutrients and had the advantages of a high timeliness, low sample volume, and low pollution. The soil nutrient management system adopted the hierarchical clustering method to classify the grid cells of the experimental field according to the nutrient detection results. A soil nutrient distribution map displayed the spatial difference in nutrients. This paper provides a systematic solution for soil nutrient zone management that includes nutrient detection, signal analysis, data management for the nutrient zone, and field nutrient distribution map generation to support decision making in variable fertilization.

Importance of palm's heart for pregnant women.

The consumption of locally nutrient-rich edible plants in rural areas can be used to satisfy the dietary diversity of pregnant women. Date palm is one of the wild edible plants in different parts of the world. Studies on wild edible plants in Ethiopia cover only about 5% of the country's districts. Furthermore, the nutrient composition of the palm heart of Phoenix reclinata is not yet investigated as it is commonly consumed by indigenous people in western Ethiopia. The utilization of such plants requires strong policy support based on scientific evidence to maintain the nutrition security of pregnant women. Homogeneous samples of 1000 grams (g) of palm hearts were collected randomly. The macronutrient contents were determined using standard methods of the Association of Official Analytical Chemists (AOAC, 2000). The flame Photometric method was used for potassium and sodium determination. The carbohydrate concentration (g/100 g) was 78⋅2. It covers approximately 78⋅5% of the total daily Recommended Dietary Allowance (RDA). In line with this, the concentrations of minerals such as potassium (K+) and sodium (Na+), per milligram (mg/100 g) of the sample were 1962⋅3 and 7⋅9, respectively. The palm heart of Phoenix reclinata has many nutritional values and is important for pregnant women. Its nutrient composition is comparable with different staple foods of the country and can contribute to household food security in rural communities.

Soil Fertility Status of Major Tobacco Growing Lands of Bangladesh

Tobacco cultivation is associated with the destruction of soil quality, productivity, and environmental pollution. An experiment was conducted to know the soil fertility status of tobacco and non-tobacco growing soils of major tobacco growing areas (Manikganj, Kushtia, Lalmonirhat, Nilphamari, Chattogram, Rangamati, Bandarban and Khagrachari) of Bangladesh. Soil samples were examined to check the level of various nutrient components of soil like Organic Carbon (OC), Nitrogen (N), Phosphorus (P), Potassium (K), Zinc (Zn) in the Laboratory of Soil Science at Bangladesh Institute of Nuclear Agriculture. Wet oxidation, Kjeldhal, Olsen, flame photometer and atomic absorption spectrophotometer methods were followed to determine the OC, total N, P, K and Zn respectively of the soil samples. Overall, the results showed a decrease in all the nutrients in the tobacco growing lands compared to non-tobacco growing lands. The amount of OC (p value 0.0271), total N (p value 0.0162) and exchangeable K (p value 0.0006) were significantly lower in the tobacco lands. The organic carbon content of both tobacco and non-tobacco land showed below standard limit (2%). The total nitrogen content of the soil samples for both tobacco and non-tobacco showed below 0.5% except the non-tobacco growing lands of Chattogram and Khagrachari. The available P and Zn content in tobacco lands also showed a decrease in compared to non-tobacco lands but statistically there were no significant differences between them. The available P and Zn content in all the soil were below 50 ppm (except Khagrachari in non-tobacco lands) which was very low. The K content was also low in the tobacco growing lands and low to medium in the non-tobacco growing lands. This result reveals the poor soil condition due to tobacco cultivation in the major tobacco growing areas of Bangladesh. So, effective measures should be taken immediately to retain the soil health.

Evaluation of Integrated Management Approaches against Citrus Nematode (Tylenchulus semipenetrans) in Pakistan

Present study was conducted to explore the nematicidal potential of different synthetic chemicals, biopesticides and antagonists against citrus decline. Effect of eleven chemicals, seven biopesticides and two antagonists on juvenile mortality was evaluated in vitro. Four concentrations (2S, S, S/2 and S/4) of each chemical were prepared on the basis of recommended dose for each chemical. Juvenile mortality of citrus nematodes was calculated after 24, 48 and 72 hour of exposure to chemicals. Rugby expressed maximum percentage of juvenile mortality at 2S, S, S/2 and S/4 concentration. Mortality percentage observed by Rugby, Furadan, Match and Cartap after 72 h at 2S concentration was (100, 100, 95.44, 88.23%) whereas at S/4 concentration mortality percentage was (76.32, 81.18, 62.15, 55.28%) respectively. Among biopesticides maximum percentage mortality observed by Proclaim and Cure after 72 hours at 2S concentration was (83.87, 80.44%) while at S/4 concentration it was (59.87, 57.38%) respectively. Cultural filtrates of two antagonist Trichoderma harzianum and Trichoderma viridi were evaluated at S, S/2 and S/4 concentration under lab conditions. Maximum mortality (88.42%) was observed when both antagonists were applied in combined treatment at S concentration after 72 hours of exposure. Two best performing chemicals, one biopesticide and one antagonist were evaluated under greenhouse against T. semipenetrans on Citrus jambhiri Lush (rough lemon) and their effect on plant growth and nutrient uptake was measured. Nitrogen uptake was measured by following micro Kjeldahl method. For phosphorus and potassium uptake absorbance of samples at 720 nm was measured with the help of spectrophotometer. Phosphorus was calculated by comparing standard curve already prepared while potassium uptake was assessed by flame photometer method after digestion. All the treatments were found significantly effective against citrus nematode but maximum plant height, stem diameter, number of leaves, root length, root weight, shoot weight, and number of feeder roots (90 cm, 2.4 cm, 102, 48.3 g, 12.1 g, 48.8 g and 70) as compared to control when Rugby, Furadan, Proclaim and T. harzianum were applied in combination. Similarly maximum uptake of Nitrogen (3.14) Phosphorous (2.44%) and Potassium (1.95%) was observed when all the treatments were applied in combination. The results of present study will be helpful in selecting the suitable chemicals for growers having problems of citrus nematodes in orchards.

DEVELOPMENT AND VALIDATION OF FLAME PHOTOMETRIC METHOD FOR ESTIMATION OF SODIUM, POTASSIUM AND CALCIUM IN PANCHALAVANA

Background: Lavana is essential component of diet, Lavana is a vital substance for the survival of all living beings, particularly humans, because it controls the body fluids and regulates the concentration of blood and blood volume hence we aimed to develop and validated the concentration of Sodium, potassium, calcium in Panchalavana by using Flame photometric method. Materials & Methods: Panchalavana validated by using Flame photometer method was validated by linearity, accuracy, limit of detection, limit of quantitation. Study Setting: ACRL SJGAMC&H Koppal. Sample Collection: Sample collected public vendors from Koppal, Karnataka, India. Results & Discussion: In Panchalavana sodium is highest appreciated samudra lavana observed 334.04 concentration of Na, Aaudbida lavana 333.04, sauvarchala lavana 314.14, vida lavana 300.81, saindhava lavana 255.59. highest concentration of sodium observed in samudra lavana and lowest concentration in saindhava lavana. highest concentration of potassium observed in vida lavana 222.46 and in Aaudbidha lavana 65.51, lowest concentration of potassium showed in saindhava lavana 5.42. The concentration of calcium showed in Vida lavana is 1.38. Conclusion: the developed method was simple, accurate precise, rapid and sensitive, hence proposed method stands out validated and thus may be used for routine analysis.

Association of some biochemical parameters and blood pressure among males with hypertension in the camps of Nineveh province-Iraq.

Hypertension is a significant public health problem that affects people all over the world. Various epidemiologic researches have been conducted to reveal the relationship between hypertension and several biochemical markers. The goal of this project was to investigate the electrolytes, glucose, total protein, and lipid profile in people with normal and high blood pressure. Between 2020 and 2022, a case-control study was done. Two hundred and eighteen males, age ranging from 30 to 70, took part in the study. The conventional flame photometric method was used to evaluate serum electrolytes, whereas kits from Biolab Company's kits were used to quantify serum calcium, serum glucose, and lipid profile. When compared to normotension males, hypertension males had considerably greater salt, chloride, and potassium levels in their blood, but no significant variations in calcium levels. When compared to normotension males, hypertension individuals had considerably higher mean glucose, total cholesterol, low, and high-density lipoprotein cholesterol, and triglycerides. Many amino acids were identified in the blood of male hypertension patients, consisting of leucine, aspartic acid, glutamic acid, asparagine, serine, histidine, glycine, arginine, alanine, methionine, valine, and phenylalanine. In this group, hypertension males have a different lipid and electrolyte profile than normotensive males.

Incidence of Freshwater Aquatic Macrophytes in Relation to the Nutrients Content of Gwaigwaye and Mairuwa Reservoirs, Funtua, Nigeria

Studies were conducted between (September, 2017 to October, 2018) to investigate the variation in the compositional distribution of macrophyte communities in relation to the nutrient contents in the water and sediments of Mairuwa and Gwaigwaye reservoirs, Funtua located in the Northern vegetation of Nigeria. All the nutrients from sediments were analyzed using Standard procedures using Spectrophotometer, flame photometer and titration methods. Nitrogen, Phosphorus and Calcium were higher in Mairuwa reservoir than in Gwaigwaye; while Potassium on the other hand, was higher in Gwaigwaye than in Mairuwa reservoir. Magnesium was not detected in either of the two reservoirs. The modified method of flora collection was used with a random sampling technique. The correlation analysis indicated that the distribution and abundance of aquatic macrophyte composition were significantly (P<0.05) different. The overall community structure was made up of nine (9) from Mairuwa and eleven 11 species from Gwaigwaye reservoirs. Both the number of species present and the densities of such species were higher in Mairuwa than in Gwaigwaye reservoir. Four growth patterns of macrophytes were observed viz; Emergent macrophytes were the dominant (56.7%), Floating macrophytes (26.5%), submerged macrophytes (13.4%) and the least marginal macrophytes (3.4%). Similarly, species densities (stands per square metre) ranged from 1-29m, in Mairuwa, and 4-90m in Gwaigwaye. Implications of these trends to the well being of the two ecosytems are highlighted. Government and non-governmental organizations at all levels should ensure that the precious aquatic resources are solely protected by enacting laws against the anthropogenic action of the inhabitants in and around the catchment.

Assessment of Water Soluble Ionic Composition of Respirable Particulates from the Coastal Region, Gandhidham-Kachchh, Gujarat, India

Gaseous pollutants serve as precursors of ionic particles in the atmospheric environment, thus their control is necessitated along with the particulate with special reference to soluble ions. The present study was undertaken to assess the effect of Particulate Matter (PM10) associated Water-Soluble Ions (WSI) on the ambient air concentration. In total 134 airborne particulate matter (PM10) samples were collected from 11 stations from January to December in and around Gandhidham, Gujarat, India. Monthly sampling was carried out by the Respirable Dust Sampler (RDS) on 24 hr basis. The samples were subjected to chemical analyses for estimating water-soluble ions. The PM10 concentration in the analyzed samples ranged from 29 to 401 µg/m3. The amount of Na+, Ca2+ and K+ varied from 0.04 to 8.43 µg/m3, Below Detection Level (BDL) to 12.25 µg/m3, and 0.09 to 3.49 µg/m3, respectively following flame photometer method. The anions SO 2-, NO - and Cl- ranged from 0.31 to 3.68 µg/m3, 0.39 to 32.47 µg/m3, and 4.03 to 54.08 µg/m3, respectively. Higher concentrations were reported for all the ions during winter. From the results, it is evident that secondary anthropogenic aerosols, natural mineral aerosols and mixed sea salt contributed to higher ionic concentrations in the air.

VALIDASI PENENTUAN KALIUM (K) DALAM SAMPEL AIR MENGGUNAKAN FLAME FOTOMETER

Measurement of potassium levels in tap water using the flame photometric method and validating the flame photometric method. Validation was carried out at the Water Laboratory, Groundwater Center and Environmental Geology Bandung. The test parameters for validation include linearity, accuracy, precision, detection limit and quantitation limit. The results of determining the validation parameters obtained good linearity, indicated by the correlation coefficient value of 0.9998, detection limit of 3.681 mg / l, quantity limit of 12.27 mg / l, good precision indicated by% RSD of 1.139%, good accuracy indicated by the% recovery value of 103.88%, based on the t test and F test

Statistical variation in Soil Nutrient Characteristics near Industrial Area of Mayiladuthurai Taluk of Mayiladuthurai District in Tamilnadu, India

Surface soil samples were collected from the 0-50 centimeter depth and assessed the soil statistical variation in physico-chemical parameters. The soil grain class of the surface layer is (0-58 centimeter) of the shape. Soil samples of the experimental field were clay loam while it was clay for the subsurface (25-100 Centimeter) layers of the profile. The soil samples were air-dried, crushed and passed through a 2 mm sieve before analyzing it for Nitrogen, Phosphorus, Potassium, Organic Carbon, Organic Matter, pH and exchangeable bases. Soil pH was measured electrometrically with a glass electrode pH meter, EC was determined are by using Conductivity meter. Alkaline permanganate method, colorimetric method and Flame Photometer method is used to determine Macronutrients like N P and K. Walkley and Black method is used to determine Organic Carbon (OC) and Organic Matter (OM). While the SAR, ESP% and Cation Exchange Capacity (CEC) were calculated. Micronutrients like Zinc(Zn), Copper(Cu), Iron(Fe) and Manganese(Mn) were determined by using Atomic Absorption Spectrophotometer (AAS). Available Soil pH ranged between 7.3 to 7.9. The available Electrical Conductivity (EC) values ranged from 0.18 to 0.5dsm-1 within the range for optimal growth of plants. The ranges of available Organic Carbon are ranged between 0.23% and 0.36%, Organic matter content ranged between 0.46 and 1.11 %. Nitrogen 39.2 kg/ha-1 and 72.8 kg/ha-1 are lower than that of the control soil. Available Phosphorus is ranged between 30.00 kg/ha-1 and 67.5 kg/ha-1 and is slightly higher than that of the control soil and potassium 169 kg/ha-1 and 370 kg/ha-1 content were high respectively. Cu is available between 0.72 – 0.92 ppm and Cu was found in 100% sufficient in study area. Zn is noticed between 0.62-0.82 ppm and Zn was found in 100% deficient in study area. Mn is available between 1.18-3.92 ppm and Mn was found in 70.0% deficient and 30.0% sufficient in study area. The available concentration of Fe ranged between 3.09-4.88 ppm and Fe was found in 100% sufficient in the study area. Where all below the recommended limits. Our aim is to support the farmers to characterize the soil based on their nutrition status for best suited crops which can be used effectively for crop production and enhanced productivity [1]. The statistical variation in soil nutrition is focused in Mayiladuthurai taluk in the present study at industrial based agriculture land area of Mayiladuthurai taluk in Mayiladuthurai district. The recommendations of fertilizer can be made for the crops to enhance the productivity. Soil test assessed and recommends the application of balanced fertilizers would go a long way in enhancing soil fertility and productivity.

Estimation of Heavy Metals in Selected Medicinal Herbs

Worldwide nearly 80% of peoples are using the medicinal plants for basic illness due to the presence of primary metabolites, secondary metabolites, minerals and inorganic salts. Some Inorganic minerals available in plants are useful for health and have therapeutic value and some heavy metals are dangerous for health and may cause damage to internal organs. In view of that, the present study designed to quantitatively evaluate the presence of inorganic minerals like Sodium, Potassium, Calcium, Magnesium, Zinc and Copper and heavy metal like Mercury, Arsenic, Lead, Cadmium, Selenium, Cobalt and Chromium in selected medicinal herbs using Flame photometric method and tomic absorption method There is a limitation for the presence of heavy metals in herbal drugs, The distributions of these metals are not uniform all areas, so before using for formulation development all herbs should be taken for the estimation of heavy metals. In this study an attempt to estimate the inorganic elements and heavy metals present in some of the important medicinal plants like Moringa oleifera Lam, Achyranthes aspera Linn, Scoparia dulcisLinn, Achyranthes aspera Linn. Castus pictus Linn, are mostly used in traditional medicines. Based on the analysis, the result shows the minerals like Sodium, Potassium, Calcium, Magnesium, Zinc and Copper were present in considerable quantity e and heavy metals like Mercury, Arsenic, Lead, Cadmium, Selenium, Cobalt and Chromium were within the limit as per WHO standard values. ed plants are containing heavy metals were within the limit as per WHO standard. Further these medicinal plants can use for new herbal formulations.

Effect of Temperature Extraction on the Potassium and Calcium Content in the Lemon and Orange Water Peel Extracts

The aim of this study is to examine the effect of temperature extraction on the potassium (K) and calcium (Ca) contents in orange and lemon peel extracts. The extractions were done at 62 ºC and 92 °C for 15 minutes and atmospheric pressure in distilled water. The fruit peel content in the extraction mixture was 5 % (w/v) in all samples. Calcium (Ca) and potassium (K) concentrations have been determined by flame photometric method. This research has revealed that by increasing the temperature of extraction, in particular, the concentration of Ca and K concentrations increased as applied extraction temperatures increased. The concentration of potassium is higher than the concentration of calcium in orange and lemon extracts, respectively. The concentration of K was 308 mg/l at 62 ºC and 361 mg/l at 92 ºC in lemon extracts, while in orange extracts the concentration of K was 476 mg/l at 62 ºC and 483 mg/l at 92 ºC. The concentration of Ca was 70.8 mg/l at 62 ºC and 71.9 mg/l at 92 ºC in lemon extracts, while in orange extracts the concentration of Ca was 91 mg/l at 62 ºC and 93.6 mg/l at 92 ºC. These results confirm that both citrus could be a very valuable source of potassium and calcium which are needed micronutrients to ensure the water and electrolyte balance and to build and maintain strong bones, proper function of muscles and nerves.

Features of sodium determination in dilute mixed solutions with phenylalanine by flame photometry

Flame spectrophotometry is one of the main methods for determining alkali and alkaline earth metals in solutions. Chemical analysis by the flame photometric method have become of great importance for estimation of trace elements content and for work on small quantities of sample. The most important disadvantages of flame spectrophotometry are different types of interference (spectral, chemical, and physical). The paper considers mainly the physical interference which directly relates to the state of the sample itself and includes solution temperature, viscosity, surface tension, and vapor pressure. These effects are interdependent and not easily isolated for study. The addition of a substance increases the viscosity of the solution, which affects aerosol formation, transport, droplet size distribution, evaporation rate and flame temperature. All that leads to a decrease in the intensity of light emission. In the present article, the effect of phenylalanine on the sodium determination by the flame photometric method in the field of dilute solutions was studied. A decrease in the photocurrent emission of sodium in its joint determination with phenylalanine was found. The main reason is the increase in viscosity. It leads to a reduction in the spraying rate in the analyzer and a diminution in the analytical response of the device. The systematic type of errors in determining the concentration of sodium in the presence of phenylalanine is proved.

Analysis Of Phosphorus And Potassium Levels In Organic Fertilizer In The Integrated Laboratory Of Jombang District Agriculture Office

Quantitative analysis in the integrated laboratory of Jombang District Agriculture Office has been done on two samples of organic fertilizer with phosphorus and potassium parameters, considering these two elements are macronutrients which have an important role in the growth and development of plants. Determination of phosphorus level has been done by ascorbic acid method using double beam UV-Visible spectrophotometer, while determination of potassium level has been done by flame photometric method. There are 2 samples code of organic fertilizer, 13/F/16 and 14/F/16. From the result of analysis, the phosphorus level as P2O5 in 13/F/16 sample is 0.275%, while in the 14/F/16 sample is 0.29%. The potassium level as K2O in 13/F/16 sample is 2.58%, while in the 14/F/16 sample is 2.67%. These results meet the requirements for compost quality standards based on SNI 19-7030-2004, because they exceed the minimum requirements, which are 0.10% for phosphorus level and 0.20% for potassium level.