Development of Measurement Technologies for Low‐Cost, Reliable, Rapid, On‐Site Determination of Arsenic Compounds in Water

Tyson, Julian F.

doi:10.1002/9780470371046.ch7

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…The need for test methods that facilitate extensive and continuous As monitoring by local people was soon understood when the problem became known; the use of laboratory-based tests had to be excluded because of their costs and the logistics involved in sampling, transport and communicating results. Many studies have been published over the last 15 years either describing new field kits or comparing existing ones ( [64] and references therein). The ideal test should be affordable, robust, mobile, safe for the user, environmentally friendly, and easy to operate.…”

Section: Cheap Simple and Reliable Analytical Methodsmentioning

confidence: 99%

Food for Thought: A Critical Overview of Current Practical and Conceptual Challenges in Trace Element Analysis in Natural Waters

Filella

2013

Water

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Abstract:The practical and conceptual challenges faced by the analysis of trace elements present in natural waters are not merely, as is often thought, an endless race towards lower detection limits or to the development of techniques allowing the determination of any possible chemical species formed by all chemical elements. Rather, as discussed in this paper, they include the development of (i) robust, cheap, and reliable methods that could also be used by laypeople (the experience gained in the development of field kits for As is discussed as an example from which similar developments for other elements may be drawn); (ii) more environmentally-friendly methods (the current guiding criteria probably being too simplistic); and (iii) methods making it possible to follow diel concentration changes and sharp concentration variations caused by the probable increase of heavy rainfall events. This paper also claims that neither the measurement of total concentrations (reliable methods are lacking for many elements of the periodic table of trace elements, as illustrated through the cases of Bi, Te, and Sb), nor chemical speciation analysis, are as mature as often thought. In particular, chemical speciation studies demand the development of a better, comprehensive conceptual framework. A trial is carried out to lay the basis of such a framework.

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Section: Cheap Simple and Reliable Analytical Methodsmentioning

confidence: 99%

Food for Thought: A Critical Overview of Current Practical and Conceptual Challenges in Trace Element Analysis in Natural Waters

Filella

2013

Water

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“…The time associated with generating arsine gas has been analyzed for a variety of FTKs. Through increasing the time span of the reaction samples of 15 μg/L, those previously analyzed incorrectly were properly registered above a semi-quantitative concentration of 10 μg/L for both the EZ and Hach FTKs [45], [46]. Although the FTK has focused on promoting short reaction times to increase sales, it is apparent that lengthening this reaction will provide a more quantitative result.…”

Section: Generation Of Arsine Gasmentioning

confidence: 97%

Refining field portable technology: quantification of arsenic field test kits

Battaglia¹

2021

Preprint

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This thesis investigates issues related to the detection of arsenic from water sources and the analysis performed to quantify its presence. Through the literature it is shown that colourimetric means of analysis are essential, but current techniques suffer quantitatively, generally relying on a technicians’ ability to visually discern colour. An increased level of control, over the Gutzeit method, would serve to drastically improve the existing means of analysis. With reliance being placed on simple field portable technologies, considerable room has been left for misclassifications. Methodology and means of using these commercial products must therefore be tuned, if they are to be globally accepted as a means of quantification. This thesis compared both benchmark and colourimetric technologies, to redefine in-field analysis. Here the goals were to improve both the classification of arsenic concentrations in water and alleviate the need for technical proficiency. A framework was built under ideal conditions, moving away from the qualitative state of existing colourimetric analyses. A combination of cameras and imaging apparati were put to use, in the acquisition of colourimetric indicator images. MATLAB algorithms were applied to quantitatively discern samples with assembled calibration curves.

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“…The status of test kits based on the Gutzeit reaction has been reviewed by Tyson. 12 The US Environmental Protection Agency's Environmental Technology Verification (ETV) Program 13 has, for several years, been evaluating arsenic test kits according to a rigorous and extensive set of standard protocols. The ETV program has, to date, evaluated eight test kits based on the Gutzeit reaction submitted by the manufacturers.…”

Section: Introductionmentioning

confidence: 99%

Improving the accuracy and precision of an arsenic field test kit: increased reaction time and digital image analysis

Kearns

Tyson

2012

Anal. Methods

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Development of Measurement Technologies for Low‐Cost, Reliable, Rapid, On‐Site Determination of Arsenic Compounds in Water

Cited by 4 publications

References 57 publications

Food for Thought: A Critical Overview of Current Practical and Conceptual Challenges in Trace Element Analysis in Natural Waters

Food for Thought: A Critical Overview of Current Practical and Conceptual Challenges in Trace Element Analysis in Natural Waters

Refining field portable technology: quantification of arsenic field test kits

Improving the accuracy and precision of an arsenic field test kit: increased reaction time and digital image analysis

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