Publication: A simple cyanide test kit for water and fruit juices
41
Issued Date
2010-11-01
Resource Type
ISSN
17599679
17599660
17599660
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2-s2.0-78650358472
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Mahidol University
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SCOPUS
Bibliographic Citation
Analytical Methods. Vol.2, No.11 (2010), 1698-1701
Suggested Citation
Manita Untang, Juwadee Shiowatana, Atitaya Siripinyanond A simple cyanide test kit for water and fruit juices. Analytical Methods. Vol.2, No.11 (2010), 1698-1701. doi:10.1039/c0ay00458h Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/28880
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Title
A simple cyanide test kit for water and fruit juices
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Abstract
A sensitive, selective, rapid, and user-friendly field test kit was developed for the determination of cyanide. The method was based on a reaction to generate hydrogen cyanide from the solution containing cyanide by reaction with sulfuric acid in a specially designed reaction bottle. The gaseous hydrogen cyanide diffused and was collected on a paper strip impregnated with p-nitrobenzaldehyde and o-dinitrobenzene in sodium hydroxide. Hydrogen cyanide reacted with p-nitrobenzaldehyde to form an intermediate p-cyanobenzadehyde cyanohydrin, which reacted with o-dinitrobenzene to give a purple compound, the dianion of o-nitrophenyl hydroxylamine. The intensity of the purple color depended on the concentration of cyanide in the test solution. The developed field test kit could be used for the detection of cyanide as low as 0.01 mg l-1 within 10 min. The cyanide field test kit was applied to determine cyanide concentrations in natural water and commercial fruit juices with good accuracy as validated by using the APHA/AWWA/WEF standard method 4500-CN-. © 2010 The Royal Society of Chemistry.