Hydride generation-smartphone RGB readout and visual colorimetric dual-mode system for the detection of inorganic arsenic in water samples and honeys

Chenxi Jiang; Shuang Ye; Jing Xiao; Chao Tan; Huimin Yu; Xiaoli Xiong; Ke Huang; Yujia Deng; Zhirong Zou

doi:10.1016/j.fochx.2023.100634

Hydride generation-smartphone RGB readout and visual colorimetric dual-mode system for the detection of inorganic arsenic in water samples and honeys

Food Chem X. 2023 Mar 11:18:100634. doi: 10.1016/j.fochx.2023.100634. eCollection 2023 Jun 30.

Authors

Chenxi Jiang¹, Shuang Ye¹, Jing Xiao¹, Chao Tan², Huimin Yu¹, Xiaoli Xiong¹, Ke Huang¹, Yujia Deng³, Zhirong Zou^{1

2}

Affiliations

¹ College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China.
² Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin, Sichuan 644000, China.
³ College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637000, China.

Abstract

A miniaturized/portable dual-mode colorimetric analytical system was established for inorganic arsenic determination in honey and drinking water samples. Hydride generation (HG) was utilized as a sampling technique for this colorimetric system, because of its high generation efficiency and efficient matrix separation. AsH₃ was generated via HG and then reacted with HAuCl₄, gold nanoparticles (Au NPs) were formed on the paper sheet, leading the paper color changed from light yellow to dark blue, it could be readout by naked-eye (visual colorimetric mode) and a smartphone (RGB readout mode) simultaneously. The accuracy and potential application for field analysis were further confirmed by the analysis of two water samples, four honey samples and two certified reference water samples (BWB2440-2016 and GBW08650), good recoveries (90-116%) were obtained for those samples and their spiked samples.

Keywords: Gold nanoparticles; Hydride generation; Inorganic arsenic; Smartphone RGB readout; Visual colorimetric.