Colorimetric test paper for cyanide ion determination in real-time

Xiao-xiao OU, Yong-lei JIN, Xiao-qiao CHEN, Cheng Bin GONG, Xue-bing MA, Yu-song WANG, Cheuk Fai Stephen CHOW, Qian TANG

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33 Citations (Scopus)


A colorimetric cyanide ion (CN⁻) sensor 4-[(1E)-2-(2-hydroxyphenyl)ethenyl]-1-allylpyridinium bromide (2-HPEAPB) was synthesized via condensation and N-alkylation reactions using 4-methylpyridine and salicylaldehyde as the starting materials. 2-HPEAPB displayed good selectivity, fast response, and high sensitivity toward CN⁻ over other competing anions in acetonitrile–water (95 : 5, v/v) with a limit of detection of 8.0 × 10⁻⁶ mol L⁻¹ by the naked eye. The sensing mechanism and the influence of pH and temperature on sensing properties were investigated. Colorimetric test paper for CN⁻ was prepared by absorption of 2-HPEAPB to a chromatography paper, which could be used to detect CN⁻ directly and quickly. Analytical application of measuring CN⁻ concentration in an electroplating wastewater in real-time was conducted successfully. Copyright © 2015 Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)5239-5244
JournalAnalytical Methods
Issue number12
Early online dateMay 2015
Publication statusPublished - 2015


Ou, X.-x., Jin, Y.-l., Chen, X.-q., Gong, C.-b., Ma, X.-b., Wang, Y.-s. et al. (2015). Colorimetric test paper for cyanide ion determination in real-time. Analytical Methods, 7(12), 5239-5244.


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