Determination Of Manganese Research Articles

Adapalene as a chemical sensor for sensitive determination of manganese

ABSTRACT The work describes the use of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2- naphthoic acid, or Adapalene (ADP) as a fluorescence tagging reagent, in a straightforward and very specific spectrofluorometric approach for the trace measurement of manganese (VII) in water. The process is based on the redox interaction of ADP with manganese (VII) in an acidic solution, which forms the complex [Mn (II)-ADP] and causes fluorescence at λex max/λem max = 323/400 nm. High-intensity fluorescence at 400 nm was seen in the fluorescence spectra of the formed complex ion association, Mn (II)-ADP, at pH 4. 1.55 µg mL−1 was the quantification limit, and 0.51 µg mL−1 was the detection limit and the correlation coefficient (R2) was 0.9863. 1.2173 L mol−1 was determined to be the Stern-Volmer. Spectrofluorometric technique is used to validate the approach in environmental water samples, yielding reasonable recovery percentages (89–93%). The current approach is advised to be used for reliable and accurate assessment of manganese (VII) in all wastewater and seawater samples, without the need for complex instrumentation and lengthy procedures.

VERIFIKASI KUALITAS ANALISIS MANGAN MENGGUNAKAN TEKNIK ICP-OES DALAM SAMPEL AIR MINUM

Drinking water quality, including the levels of dissolved metals, is an important public health consideration. Manganese (Mn) is a naturally occurring metal that can be present in drinking water sources, and excessive intake of Mn can have adverse health effects. The objective of this study was to verify the performance of the analytical method for the determination of manganese (Mn) concentration in drinking water samples using Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) techniques at the PT XYZ Laboratory. The method verification included tests for analyte identity confirmation, linearity, precision, accuracy, as well as the determination of the Method Detection Limit (MDL) and Limit of Quantification (LOQ). The verification results showed that the ICP-OES method met the established performance requirements. The linearity test yielded a correlation coefficient (r) of 0.9998, fulfilling the criteria of r ≥ 0.995. The percent relative standard deviation (% RSD) value in the precision test was 1.41%, meeting the requirement of % RSD ≤ 2/3 % CV Horwitz. The accuracy test provided an average percent recovery of 98.66%, which is within the acceptable range of 85-120%. The determined MDL was 0.0006 mg/L, while the LOQ was 0.002 mg/L, both meeting the criteria of MDL < spiked concentration < 10 MDL and LOQ < environmental quality standard. In conclusion, the method for the determination of Mn concentration in drinking water using ICP-OES has been verified and can be used for routine analysis at the PT. XYZ Laboratory, supporting the monitoring and control of Mn levels in drinking water to ensure public health protection.

Simple and affordable colorimetric sensing strips for quantitative determination of total manganese in porewater samples

AbstractSimple and economical colorimetric strips for measuring manganese (Mn) in natural waters are described. For their construction, leucomalachite green (LMG) embedded in a Nafion® polymeric matrix was immobilized on a polyvinylchloride surface. Upon immersing the strips in the sample, any soluble manganese(II/III) present catalyzed the oxidation of the LMG base to malachite green by adding sodium periodate. The observed color change is related to the manganese concentration and can be quantified using a field device constructed using commercial red–green–blue sensors and an Arduino® board. A linear response from 0.1 to 0.6 μmol L−1 manganese (limit of detection: 0.1 μmol L−1) was observed. The signal for strips prepared on 7 d gave a relative standard deviation equal to 13%. The strips showed good agreement with results obtained by ICP‐MS in porewater collected on Spiekeroog Island (North Sea). Therefore, the method is a tool for rapid measurements of manganese in porewater samples offering new possibilities in understanding biogeochemistry for high temporal and spatial resolution manganese surveys and providing an analytical technique that provides field results comparable to laboratory systems.

Evaluation of Extractants for Determination of Micronutrients in Soils of South Gujarat, India

An experiment was conducted at Department of Soil Science and Agricultural Chemistry, Navsari Agricultural University during the year 2018-19. The methods of micronutrients determination were (i) extracted through diethylene triamine penta acetic acid (DTPA) (ii) extracted through ammonium bicarbonate- diethylene triamine penta acetic acid (AB-DTPA) (iii) extracted through Neubauer. The methods of micronutrients were evaluated through method validation parameters like linearity, sensitivity of instruments, precision and predictability. The available micronutrients determined from the sample soils were correlated with soil physico-chemical properties to know the relationship of these properties with available micronutrients. The linearity study of the series of micronutrients standard were measured through different methods of micronutrient determination. These measured values showed linear relationship with reference values. The coefficient of determination (R2) for all the methods was > 0.90. The precision was determined by relative standard deviation (RSD) (%) of different micronutrient methods which were in the range of 1.834 to 19.11 %. All the studied methods of copper, iron, zinc and manganese determination, AB-DTPA extractant method has highly significant and positive correlation with nutrient uptake by wheat on Microwave Plasma Atomic Emission Spectroscopy (MP-AES) instrument. Organic C and sand content of soil have positive correlation with micronutrients availability. While pH, EC, CEC, CaCO3, silt and clay content of soil have negative correlation with available micronutrients.

Determination of manganese(II) using adapalene as a novel chromogenic reagent

ABSTRACT This study was focused on testing and evaluating the adapalene drug as a novel and selective chromogenic reagent for estimating the manganese in biological (blood plasma), pharmaceutical (syrup) and drinking water samples. The limit of detection and quantification were 0.0448 and 0.1492 μg mL−1, respectively. The effective molar absorptivity (ε) was 2.0297 × 104 L.mol−1.cm−1. The method’s sensitivity was 4.2786 × 10−4 μg cm−2 without interference with the common ions. The results demonstrated that the stability constant of the [Mn(II) – ADP] complex was 3.7238 × 107. An excellent and perfect recovery percentage of manganese(II) was achieved in tested samples, which ranged from (98–100%), (99–105%), and (97–101%) in blood plasma, medicated syrup and drinking water, respectively. Moreover, the developed method was validated by the reference ICP-OES method. The results revealed perfect compatibility between the results obtained by the developed and ICP-OES method.

Analytical application of flower-shaped nickel nanomaterial for the preconcentration of manganese in domestic wastewater samples.

In this study, detection sensitivity of the conventional flame atomic absorption spectrophotometer (FAAS) for the determination of manganese (Mn2+) was enhanced by employing a preconcentration method from wastewater samples. Flower-shaped Ni(OH)2 nanomaterials were synthesized and used as sorbent material in preconcentration procedure. With the aim of attaining optimum experimental conditions, effective parameters of extraction method were optimized and these included pH of buffer solution, desorption solvent concentration and volume, mixing type and period, nanoflower amount, and sample volume. The detection limit of the optimized method was determined to be 2.2 μg L-1, and this correlated to about 41-fold enhancement in detection power relative to direct FAAS measurement. Domestic wastewater was used to test the feasibility of the proposed method to real samples by performing spike recovery experiments. The wastewater sample was spiked at four different concentrations of manganese, and the percent recoveries determined were in the range of 95-120%.

Simultaneous complexation and extraction of manganese in melissa tea sample by deep eutectic solvent based liquid phase microextraction

Manganese at trace levels cannot be detected by flame atomic absorption spectrophotometer (FAAS) without a preconcentration method. In the presented study, an accurate and sensitive analytical method for the determination of manganese at trace levels in melissa tea samples was established. Deep eutectic solvent based liquid phase microextraction (DES-LPME) was used to preconcentrate the analyte from aqueous medium. Several important parameters were individually optimized to achieve high signal to noise ratio for the analyte in FAAS system. Under the optimum experimental conditions, limit of detection (LOD), limit of quantitation (LOQ) and linear range (LR) for the developed DES-LPME-FAAS system were found as 1.7 µg/kg, 5.8 µg/kg and 6.5–202.8 µg/kg, respectively. Enhancement in detection power was calculated as 112.2 folds by dividing manganese LOD value in FAAS system to value obtained by DES-LPME-FAAS system. Three different melissa tea samples were analyzed by the proposed method to find their manganese content. Percent recovery results for the tea samples ranged between 80.4% and 122.6% with low standard deviation values.

Comparative analysis of methods for the determination of chromium, vanadium, copper, nickel, and manganese in steel and cast iron by flame atomic absorption spectrometry

A comparative analysis of the methods used for determination of a number of elements in steels and cast irons by atomic absorption spectroscopy with flame atomization have been carried out (vanadium by COST 12351-2003, GOST 22536.12-88, GOST 2604.7-84; chromium by GOST 12350-78, GOST 22536.7-88, GOST 2604.6-77; copper by GOST 22536.8-87, GOST 12355-78, GOST 2604.9-83, GOST 4943-2010; manganese by GOST 12348-78, GOST 22536.5-87, GOST 2604. 5-84; nickel by GOST 12352 - 81, GOST 22536.9-88, GOST 2604.8-77, GOST 4940-2010; in alloyed and unalloyed steels and alloyed and unalloyed cast irons). Analysis of the data obtained revealed the possibility of combining the considered Russian national standards into universal multi-element methods for the materials under study. The developed methods have been then certified in the analytical laboratory of the testing center of the Institute for certified reference materials (ICRM). The proposed methods provide an extension of the range of determined concentrations under optimal conditions of analysis. Comparison of the developed methods for the determination of vanadium, chromium, copper, manganese, nickel in steels and cast irons with international standards ASTM E350-18, ASTM E351-18, ASTM E352-18 have been carried out.

The method of direct determination of manganese in fresh parsley leaves and roots using capillary electrophoresis method.

This is the first work presenting a simple, rapid and sensitive method using capillary electrophoresis (CE) for the direct determination of manganese (II) in fresh parsley leaves and roots. The developed method has been optimized and validated. Optimum separation of Mn2+, by measuring at 214 nm, was obtained on a 30 cm × 75 μm capillary using a 50 mM phosphate running buffer (pH 3.0), capillary temperature 25°C, voltage 10 kV, and hydrodynamic injection. Good results were obtained for different aspects including stability of the solutions, linearity, and precision. Detection and quantification limits for Mn2+ were reached at the level of 0.97 and 2.94 μg/mL respectively. The sample preparation procedure is very simple and not time consuming. This method has been successfully used to the measuring concentration of Mn2+ in order to determine the content of this ion in parsley leaves and roots. The speed of obtaining the result of the analysis was only 3 minutes.

Determination of copper, magnesium, and manganese in aluminum alloys using laser-induced breakdown spectroscopy based on fiber laser ablation

Fiber lasers are characterized by high efficiency, good beam quality, and high reliability and are widely used in industries. In addition, the high repetition frequency of fiber lasers can increase the analytical efficiency greatly. In this paper, a nanosecond fiber laser was introduced to be the ablation source in laser-induced breakdown spectroscopy (LIBS) for determining copper, magnesium, and manganese in aluminum alloys. Because of the high repetition frequency of the fiber laser, the conventional delay-acquisition strategy was unavailable. Discrete wavelet transform (DWT) was used to mitigate the interference of the Bremsstrahlung background. Standard calibration and internal calibration methods were also compared for quantitative analyses. The results demonstrated that the combination of DWT and internal calibration effectively improved the analytical accuracy. After optimization, the R2s of the FL-LIBS system for Cu, Mg, and Mn were 0.9897, 0.9964, and 0.9979, respectively; the root mean squared error of cross validation was 0.0414, 0.0462, and 0.031 wt. %, respectively. This study provides a convenient method for the rapid elemental analysis of aluminum alloys.

Synthesized f-MWCNTs/CS/PB for determination of manganese (Mn2+) in drinking water

Synthesized f-MWCNTs/CS/PB for determination of manganese (Mn2+) in drinking water

A new, green, highly effective procedure for manganese determination using alizarin-3-methylamino-N,N-diacetic acid immobilised on a polymer matrix

ABSTRACT The determination of Mn(II) ion in real objects is an important task in the medicine, pharmacology, biology, chemistry, and engineering sciences. The used methods are usually expensive, hazardous, low effective and time-consuming. In this investigation, a new, green, highly effective, selective, cost-effective and time-saving analytical regent was introduced for Mn(II) determination. The analytical properties of alizarin-3-methylamino-N,N-diacetic acid (AMADAA) immobilised onto polyethylene polyamine-modified polyacrylonitrile (PPP) matrix, AMADAA/PPP, in the determination of Mn(II) ion was studied by the spectrophotometric, potentiodynamic titration, spectroscopic analyses, and X-ray fluorescence and, besides comparing the results, selectivity was checked. It was found that (i) high selectivity, high accuracy, low detection limits, good repeatability, easy regeneration, and high speed are accessible for the proposed analytical procedure, using AMADAA/PPP matrix; (ii) spectroscopic signals of AMADAA-immobilised PPP matrix and its complex with Mn(II) ion were at 500 and 580 nm, respectively; (iii) determination limit of the analytical method for Mn(II) ion was 0.02 µg/mL; (iv) the selectivity of the used reagent, AMADAA/PPP, was very high for Mn(II) ion in the presence of Ca(II), Mg(II), Cd(II), Zn(II) and Fe(II) ions.

Dynamic reversed-phase liquid-liquid microextraction for the determination of Cd, Cr, Mn, and Ni in vegetable oils by energy dispersive X-ray fluorescence spectrometry

Dynamic reversed-phase liquid-liquid microextraction (RP-LLME) is proposed to prepare vegetable oil samples for posterior determination of cadmium, chromium, manganese, and nickel by energy dispersive X-ray fluorescence (EDXRF) spectrometry. The microextraction procedure was based on a dynamic system in which the sample flowed through the acceptor phase in an extraction chamber. After extraction, the rich phase was deposited on filter paper and subjected to metal determination by EDXRF. The following parameters were optimized: type and concentration of the acceptor phase, sample flow rate, and extraction time. Nitric acid 0.1 mol L−1, a sample flow rate of 10 mL min−1, and an extraction time of 15 min were employed in the recommended procedure. Under these conditions, limits of quantification of 6, 7, 8, and 11 μg kg−1 were obtained for Cd, Cr, Mn, and Ni, respectively. The preconcentration factors obtained were 100 (Cd), 65 (Cr), 82 (Mn), and 74 (Ni). The developed method was applied to determine Cd, Cr, Mn, and Ni vegetable oil samples.

Determination of Iron and Manganese in Various Water Sources from Selected Areas in Balaghat District

Determination of Iron and Manganese in Various Water Sources from Selected Areas in Balaghat District

Evaluation of Mehlich-3 as a Multi-Element Extractant of Micronutrients and Sulfur in a Soil–Ryegrass System Amended with Varying Biochar Rates from Two Feedstocks

Mehlich-3 (M-3) is used as a universal nutrient extractant due to its ability to simultaneously extract multiple elements. This study aimed to assess M-3 for the simultaneous determination of plant-available zinc (Zn), copper (Cu), iron (Fe), manganese (Mn), boron (B), and sulfate (SO4-S) in a soil amended with switchgrass- (SGB) and poultry litter-derived biochars (PLB), which were used to vary soil pH values (5.7–7.6) and organic carbon (OC) content (2.0–5.5%) in the short-term. Soil and ryegrass (Lolium perenne) were sampled from a growth chamber experiment and analyzed for plant-available and tissue phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), micronutrients (B, Cu, Fe, Mn, and Zn), and sulfur contents. The commonly accepted extractants diethylenetriaminepentaacetic acid (DTPA), for micronutrients, and 0.008 M monocalcium phosphate (MCP), for SO4-S, were used for the evaluation. Relationships between M-3 and DTPA were not reliable for micronutrient availability, although highly significant relationships for Zn and Cu were found. However, M-3-extractable S was highly correlated with S contents in ryegrass tissues regardless of the treatments and provided a 1:1 relationship between MCP and M-3. This offers the potential to eliminate MCP by simply adding S determination after extraction with M-3. Although this research evaluated the d-index for an easier linear relationship between the traditional and proposed methods, more research using several soil samples is needed to establish models and find conversion equations for micronutrients and SO4-S between DTPA-sorbitol, MCP, and M-3.

Metal and Molecular Vapor Separation Analysis for Direct Determination of Mn and Cu by Atomic Absorption Detection, Free of Background Absorption

The metal and molecular vapor separation analysis (MMVSA) of solid samples with an atomic absorption detector (AA) was investigated for the direct determination of manganese and copper in biological materials. An open column made with a molybdenum tube (i.d. 1.22 mm) with three-ring supporters was developed. Pure argon as a carrier gas flowed at a flow rate of 4.0 mL min−1. An ultrasonic agitation method was used for suspending NIST standard reference material powders in water. Manganese and copper in the biological powders were completely separated from Al, Ca, Fe, K, Mg, Na, and Zn elements by MMVSA under optimal experimental conditions. Several NIST biological samples were directly analyzed with satisfactory results. It was found that manganese and copper in biological materials without interferences from matrix elements could be directly determined after only an ultrasonic agitation of the biological powders. The advantages of the slurry sampling of MMVSA are simplicity, low cost, a high speed of analysis, and rapid calibration.

Plastic sieve equipped two-syringe assisted magnetic colloidal gel for dispersive solid-phase extraction of manganese in tea samples

In this study, a simple and effective analytical method was described for the determination of manganese in a spectrometric system. For this purpose, a plastic sieve fitted between two syringes was used as a dispersive solid phase extraction tool. The extraction of manganese was performed by using a magnetic colloidal gel (MCG), which was formed by mixing cobalt magnetic nanoparticle (Co-MNP) and deep eutectic solvent. All experimental parameters of the method including Co-MNP amount in MCG, MCG volume, cycle number for pressurized mixing in the two-syringe system and eluent type/volume in the desorption step were carefully evaluated in order to find the best experimental conditions for efficient extraction/preconcentration of manganese. The detection limit was calculated as 4.0 ng/mL for manganese extracted by 150 µL of MCG from 8.0 mL of aqueous solution at pH 10 with 8 cycles of pressurized mixing. In order to validate the applicability and the accuracy of the developed system, the optimum conditions were applied to jasmine tea samples. The tea samples were analyzed using the standard addition method and the manganese the manganese content were found in the range of 133 – 245 ng/mL. The obtained results showed that the developed method is applicable, accurate and feasible for the determination of manganese at trace levels.

Sustainable Downscaled Catalytic Colorimetric Determination of Manganese in Freshwater Using Smartphone-Based Monitoring Oxidation of 3,3',5,5'-Tetramethylbenzidine by Periodate.

A sustainable downscaled procedure using smartphone-based colorimetric determination of manganese (Mn(II)) was developed. This novel Mn(II) determination procedure is proposed using a simple, available microwell-plate platform and a smartphone as a detector. This approach is based on the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by periodate using Mn(II) as a catalyst. The catalytic kinetics of Mn(II) under different conditions was investigated to determine the optimum condition where the different catalytic activities of various concentrations of Mn(II) evince. Under the optimum condition, the bluish-green product of oxidized TMB, proportioned to the concentration of Mn(II), was monitored using a smartphone camera, and the color signals were processed using ImageJ Software. The developed procedure showed great selectivity and sensitivity as linearity ranged from 1.8 × 10−6 to 4.6 × 10−5 M (0.1 to 2.5 μg/mL). The limits of detection and quantitation were 3.6 × 10−6 and 1.1 × 10−5 M (0.2 and 0.6 μg/mL), respectively. The determination of Mn(II) in freshwater samples was demonstrated to assess environmental water quality as an initial model to more easily promote water management according to the United Nations Sustainable Development Goals (UN-SDGs). The intensity of the red could be successfully applied to evaluate Mn(II) in canals and river water with no significant differences compared with the reference method of Inductively Coupled Plasma Optical Emission Spectrometry at a confidence level of 95%.

Validation of an Analytical Method for the Determination of Manganese and Lead in Human Hair and Nails Using Graphite Furnace Atomic Absorption Spectrometry

This article describes the validation of analytical methods for the determination of Manganese (Mn) and lead (Pb) by graphite furnace atomic absorption spectrometry (GFAAS) in human hair and nail samples. Method validation parameters such as linearity, repeatability, reproducibility, and precision were determined. In addition, the limit of detection (LOD), the limit of quantification (LOQ), and measurement uncertainty were calculated. The developed method was linear in the concentration ranges of 0.001–0.015 and 0.002–0.020 µg·L−1 of Mn and Pb, respectively. The determination coefficients obtained were greater than 0.995. The recoveries obtained after the addition of the standard concentration for the metals ranged from 84.80–107.98%, with a precision not exceeding 12.97% relative standard deviation. The calculated LOD and LOQ for Mn and Pb are within the ranges established by Commission Regulation (EU) No. 836/2011. The expanded uncertainty was estimated to be less than 9.93–6.59% for Mn and Pb. Matrix effects were also studied, finding a smooth effect in both matrices. The analysis of 30 samples of each type revealed the presence of Mn in 30 and Pb in 13 samples. Overall, the proposed validation method was considered optimal for the determination of Mn and Pb.

Electroanalytical overview: The determination of manganese

Manganese is an essential nutrient of the human body but also toxic at elevated levels with symptoms of neurotoxicity reported, therefore its analytical determination is required. Manganese (II) is ingested primarily through food and drinking water so its routine monitoring in such samples is essential. While laboratory based analytical instrumentation can be routinely used to measure manganese (II), there is a need to develop methods for manganese (II) determination that can be performed in-the-field utilizing simple and inexpensive instrumentation yet providing comparable sensitive analytical measurements. Electrochemistry can provide a solution with instrumentation readily portable and hand-held coupled with electrochemical sensing platforms that are sensitive and provide on-site rapid analytical measurements. Consequently, in this overview we explore the electroanalytical determination of manganese (II) reported throughout the literature and offer insights into future research opportunities within this important field.