The Quantitative Determination of Arsenic by the Gutzeit Method.

Sanger, Charles Robert

doi:10.1021/ja01948a018

Cited by 9 publications

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“…We were able to show that a field method based on the Gutzeit reaction (Eqs. 1 and 2 ) [ 30 ] was capable of accurately determining concentration of iAs in rice in the field with the aid of a field kit [ 31 ]. …”

Section: Introductionmentioning

confidence: 99%

A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed

et al. 2017

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Inorganic arsenic (iAs) in 13 store-bought edible seaweed samples and 34 dried kelp (Laminaria digitata) samples was determined by a newly developed, field-deployable method (FDM) with the aid of a field test kit for arsenic in water. Results from the FDM were compared to results from speciation analysis achieved by using high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry (HPLC-ICP-MS). The FDM consisted of a simple extraction method using diluted HNO3 to quantitatively extract iAs without decomposing the organoarsenicals to iAs followed by the selective volatilisation of iAs as arsine (AsH3) and subsequent chemo-trapping on a filter paper soaked in mercury bromide (HgBr2) solution. Method optimization with a sub-set of samples showed 80–94% iAs recovery with the FDM with no matrix effect from organo-arsenic species in the form of dimethylarsinic acid (DMA) on the iAs concentration. The method displayed good reproducibility with an average error of ±19% and validation by HPLC-ICP-MS showed that the results from the FDM were comparable (slope = 1.03, R2 = 0.70) to those from speciation analysis with no bias. The FDM can be conducted within an hour and the observed limit of quantification was around 0.05 mg kg−1 (dry weight). This method is well suited for on-site monitoring of iAs in seaweed before it is harvested and can thus be recommended for use as a screening method for iAs in seaweed. Graphical abstractScreening seaweed for their inorganic arsenic concentration within one hour without bias has been made possible in the field by using a field deployable arsenic kit. Its accuracy and precision was compared to HPLC-ICPMS. Electronic supplementary materialThe online version of this article (doi:10.1007/s00604-017-2151-1) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed

et al. 2017

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“…Bralatei et al[57] developed recently a field deployable method (FDM) for determination of arsenate based on the Gutzeit[58] reaction: 2H 3 AsO 4 + 2H 3 O + + 2NaBH 4 → 2AsH 3 + 2B(OH) 3 + 4H 2 O + 2Na + (1) AsH 3 + HgBr 2 → H 2 As _ HgBr + HBr…”

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confidence: 99%

Analytical methodologies for arsenic speciation in macroalgae: A critical review

Reis

Duarte

2018

TrAC Trends in Analytical Chemistry

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“…Field methods, based on the mercuric-bromide-stain [3], consist of three different major parts, which are carried out stepwise.…”

Section: Resultsmentioning

confidence: 99%

Design and Development of Low Cost, Simple, Rapid and Safe, Modified Field Kits for the Visual Detection and Determination of Arsenic in Drinking Water Samples

Cherukuri

Anjaneyulu

2005

IJERPH

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Arsenic is naturally found in surface and ground waters and the inorganic forms of arsenic are the most toxic forms. The adverse health effects of arsenic may involve the respiratory, gastrointestinal, cardiovascular, nervous, and haematopoietic systems. Arsenic contamination in drinking water is a global problem widely seen in Bangladesh and West Bengal of the Indian sub continent. As there is a great demand for field test kits due to the anticipated reduction of the US EPA arsenic standard from 50ppb to 10ppb a field kit which offers rapid, simple and safe method for precise estimation of arsenic at 10ppb in drinking water samples is developed. Field methods, based on the mercuric-bromide-stain, consist of three different major parts, which are carried out stepwise. The first part of the procedure is to remove serious interference caused by hydrogen sulphide. In commercially available kits either the sulphide is oxidized to sulphate and the excess oxidizing reagent removed prior to the hydride generation step or, the hydrogen sulphide is filtered out by passing the gas stream through a filter impregnated with lead acetate during the hydride generation step. The present method employs cupric chloride in combination with ferric chloride or Fenton’s reagent for the removal of hydrogen sulphide, which is rapid, simple and more efficient. Other interferences at this step of the analyses are normally not expected for drinking water analysis. In the second step, the generation of the arsine gas involves the classical way of using zinc metal and hydrochloric acid, which produce the ‘nascent’ hydrogen, which is the actual reducing agent. Hydrochloric acid can be replaced by sulfamic acid, which is solid and avoids a major disadvantage of having to handle a corrosive liquid in the field. The arsine gas produces a yellowish spot on the reagent paper. Depending on the arsenic content, either, Yellow – H (HgBr)2 As (10–50ppb), Brown – (HgBr)3 As (50–100ppb) or Black – Hg3 As2 (>100ppb) are formed which can be precisely estimated by visual comparison with standard color chart. The results obtained by field kits agree well with the data obtained through I.C.P.AES methods. The most important characteristic for field measurement is that analytical results can be obtained on the site where the sample is taken with high precision and can be conveniently utilized for monitoring arsenic rapidly in a highly contaminated large geographical area.

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The Quantitative Determination of Arsenic by the Gutzeit Method.

Cited by 9 publications

References 0 publications

A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed

A field deployable method for a rapid screening analysis of inorganic arsenic in seaweed

Analytical methodologies for arsenic speciation in macroalgae: A critical review

Design and Development of Low Cost, Simple, Rapid and Safe, Modified Field Kits for the Visual Detection and Determination of Arsenic in Drinking Water Samples

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