Related Experiment Video
Updated: Apr 28, 2026
Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
Published on: September 1, 2017
Visual detection of arsenic using hydride generation followed by reaction with silver
Yoshito Wakui1, Toshishige M Suzuki
1Research Center for Compact Chemical System, National Institute of Advanced Industrial Science and Technology (AIST).
Abstract:
In this study, a simple and effective method for the detection of trace amounts of arsenic in water samples was developed. Arsenic hydride generated by the reduction of a water sample was passed through a sensing filter retaining silver bis(2-ethylhexyl)dithiocarbamate complex. The original yellow color of the filter immediately turned reddish violet. The difference of color was observed by a reflection spectrophotometer. Sensing filters made of glass fiber gave the highest sensitivity. Addition of low volatile amines effectively stabilized the performance of the sensing filter. Common anions including phosphate ion did not interfere with the arsenic detection. Visual detection of 10 μg dm(-3) was achieved in φ10 mm filter area using 60 cm(3) of sample solution.
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