Determination Of Bromide Ions Research Articles

The use of fuchsin basic for determination of bromide–ions in waters by the method of reflection colorimetry

Photometric technique has been developed for determination of bromide ions in waters; the technique is based on oxidation in an aqueous solution of bromide to bromine by chloramine T, concentration of bromine–derivative fuchsine basic on membrane filters and measurement of lightness of obtained colored concentrates in a thin layer by means of reflection colorimetry. The detection limit of bromide–ions constitutes 10 μg/dm3, the linearity of the calibration curve ranges from 10 to 1000 μg/dm3. The excess of chloramines T does not interfere with determination, which simplifies and reduces the analysis. The proposed technique is more sensitive, fast and simple in execution than existing standard techniques. It makes it possible to control the content of bromide–ions in waters both at the level and lower than MAC and may be used in field conditions at the site of sampling

Reduction of measurement uncertainty by experimental design in high-order (double, triple, and quadruple) isotope dilution mass spectrometry: application to GC-MS measurement of bromide

Since its introduction a century ago, isotope dilution analysis has played a central role in developments of analytical chemistry. This method has witnessed many elaborations and developments over the years. To date, we have single, double, and even triple isotope dilution methods. In this manuscript, we summarize the conceptual aspects of isotope dilution methods and introduce the quadruple dilution and the concept of exact matching triple and quadruple dilutions. The comparison of isotope dilution methods is performed by determination of bromide ions in groundwater using novel ethyl-derivatization chemistry in conjunction with GC/MS. We show that the benefits of higher-order isotope dilution methods are countered with a greater need for careful experimental design of the isotopic blends. Just as for ID(2)MS, ID(3)MS and ID(4)MS perform best when the isotope ratio of one sample/spike blend is matched with that of a standard/spike blend (exact matching).

Determination of bromide ions in seawater using flow system with chemiluminescence detection

A simple flow-based procedure with chemiluminescence (CL) detection is proposed for bromide ion determination in seawater. The procedure was based on the oxidation of bromide to bromine by chloramine-T followed by the reaction of bromine with luminol resulting in CL emission. Since no significant reaction within chloramine-T and luminol was observed, the detection was carried out without bromine extraction from the oxidant medium. The proposed flow system had a sampling rate of 40 determinations per hour, reagents consumption of 100 μg luminol and 60 μg chloramine-T per determination, a limit of detection of 0.5 mg l −1 bromide ions, a linear concentration range ( r = 0.999 and n = 7) between 0 and 100 mg l −1, and a coefficient of variance better than 2.5% (for 10 measurements of a 10 mg l −1 Br − solution) were achieved. The analytical system was applied for the determination of bromide in seawater and estuarine-water samples, obtaining an analyte recovery ranging from 94 to 102% and comparing the results with a reference spectrophotometric method no significant difference was observed in 95% confidence level.

Liquid Chromatographic Determination of Bromide Ion in Cereals, Fruit, Vegetables, and Blood with a Silver Electrode in an Electrochemical Detector System

A method is presented for rapid determination of bromide ion in commodities and blood by paired-ion liquid chromatography with electrochemical detection. The method involves extraction of samples with water and filtration. Blood is passed through a Sep-Pak C18 minicolumn. Recoveries are usually close to 100%, with satisfactory precision. The detection limit is 1 mg/kg. The method needs little labor and uses no noxious solvents or reagents.

Determination of Bromide ions in Commercial Salts by Ion Chromatography

Determination of Bromide ions in Commercial Salts by Ion Chromatography

Determination of Bromide Ions in Food by Unsuppressed Ion Chromatography with Ultraviolet Detection after Microwave Digestion in a Sealed PTFE Vessel

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Bromide Ions in Food by Unsuppressed Ion Chromatography with Ultraviolet Detection after Microwave Digestion in a Sealed PTFE VesselMakoto Miyahara and Yukio SaitoCite this: J. Agric. Food Chem. 1994, 42, 5, 1126–1131Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 1994https://doi.org/10.1021/jf00041a016RIGHTS & PERMISSIONSArticle Views175Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (1 MB) Get e-Alerts Get e-Alerts

Determination of bromide using flow injection and chemiluminescence detection

A method is described for the determination of bromide ion in the range 1–100 µg ml–1(correlation coefficient 0.9996) with a detection limit of 3.75 pg and a coefficient of variation of ⩽1%. The optimum parameters were studied and were found to be the following: HNO3, 0.25 M; luminol, 0.01 mM; H2O2, 10 mM; KBrO3, 100 mM; and flow-rate, 3 ml min–1. The interference from several cations was overcome by using batch and continuous exchange with a strong cation-exchange resin. Up to 100 µg ml–1 of chloride ion and 1 µg ml–1 of iodide ion did not interfere with the determination of 10 µg ml–1 of bromide; 113 samples can be injected per hour.

Trace analysis of bromide ion in water by head space gas chromatography.

We investigated an analysis of trace amounts of bromide ion in water by gas chromatography. The recommended procedure is as follows ; a sample (containing more than 0.3 μg of bromide ion) was evaporated to dryness. The remaining bromide reacted with citric acid, potassium permanganate and manganse dioxide in sulfuric acid to form pentabromoacetone, which then turned into bromoform for hydrolysis in haloform reaction. The bromoform was measured by head space gas chromatography (ECD). By this method, bromide ion of 0.3-5.0 μg was determined. The coefficient of variation was 4.3% for 2.0 μg of bromide ion. It had no effect on the determination of bromide ion in the presence of coexisting substances such as chloride. The bromide contained in environmental water samples (sea, river, lake, ground, tap, and rain water) was determined successfully by the proposed method.

Bromimetric titrimetry involving the determination of bromide ions and their oxidation products

This paper describes some improvements in bromimetric titrimetry which are based on the determination of bromide and its oxidation products formed in the reaction instead of residual bromine. These modifications are particularly applicable to compounds capable of undergoing substitution or oxidation reactions. Substances which only undergo addition reactions do not affect the determination. The determination of bromide is based on oxidation with chloramine T to bromine in the presence of acetanilide, which acts as a bromine scavenger; the residual chloramine T is then determined. The bromine oxidation products of certain organic and inorganic compounds formed on reaction with excess bromine can be determined iodimetrically after the destruction of unreacted bromine with acetanilide. The methods have been tested for the determination of (i) bromide in pharmaceuticals, (ii) a variety of organic compounds through bromide formation (e.g., hydrazine, thiourea, allylthiourea, cystine, homocystine, methionine, phenol and aniline), (iii) certain substances through their oxidation product with bromine (e.g., cyanide, thiocyanate, thallium, 4-aminophenol, hydroquinone, 4-anisidine and thiosemicarbazide) and (iv) mixtures of thiocyanate and cyanide (in polluted water), hydroquinone, thiocyanate and metol (in photographic developers) and phenacetin and paracetamol (in drugs).

Determination of bromide ion in sea water by solvent extraction and ion chromatography

Determination of bromide ion in sea water by solvent extraction and ion chromatography

Gas-Liquid Chromatographic Determination of Bromide Ion in Lettuce: Interlaboratory Studies

The gas-liquid chromatographic method for the determination of bromide ion, as originally described for grain by Heuser and Scudamore, was adapted for use on lettuce, and later on products of other vegetable or of animal origin. After optimization of the ashing and derivatization conditions, 2 interlaboratory studies were carried out in The Netherlands. In the first, a preparatory study, 6 laboratories investigated freeze-dried lettuce; in the second definitive study, 8 laboratories investigated both freeze-dried and fresh lettuce. Four lots of lettuce with bromide contents ranging from about 5 to about 200 mg/kg were investigated. Average bromide contents (mg/kg) and between-laboratory coefficients of variation were 5.6 (11.0%), 13.3 (18.4%), 29.9 (8.3%), and 209 (12.8%). The results obtained are normal for the type of work and the conditions of the study. The method will be recommended for regulatory use in The Netherlands and in international organizations.

Analysis of Bromide Ion in Wine by Ion Selective Electrode

The use of the bromide ion selective electrode for the determination of bromide ion in wine has been found to be rapid and reliable. The method has been used for still wines and carbonated wines and is applicable to all wines regardless of their country of origin. The method consists of treating a 50 ml aliquot of wine with 2 ml each of 3.75M H3PO4, saturated KNO3, and 1M CuSO4. After 10 min the electrodes are immersed in the samples and a millivolt reading is obtained. One hundred mul 500 ppm bromide ion standard is added and the millivolt reading is taken. Bromide ion concentration in the wine equals (Cdelta x 1)/((antilog deltaE/S)-1) where Cdelta equals 1, deltaE equals the change in potential expressed in millivolts, and S equals the electrode slope.