Visual quantification of Hg on a microfluidic paper-based analytical device using distance-based detection technique

被引：30
作者：
Cai, Longfei [1 ]
Fang, Yanling [1 ]
Mo, Yuanhui [1 ]
Huang, Yongshi [1 ]
Xu, Chunxiu [1 ]
Zhang, Zhen [1 ]
Wang, Maoxian [2 ]
机构：
[1] Hanshan Normal Univ, Sch Chem & Environm Engn, Chaozhou 521041, Peoples R China
[2] Hanshan Normal Univ, Sch Life Sci & Food Technol, Chaozhou 521041, Peoples R China
来源：
AIP ADVANCES | 2017年 / 7卷 / 08期
关键词：
FLUORESCENT-PROBE; SPECTROPHOTOMETRIC DETERMINATION; COLORIMETRIC DETECTION; HG(II); SPECTROMETRY; MERCURY(II); SAMPLES; METALS; SYSTEM; CHIPS;
D O I：
10.1063/1.4999784
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We presented a distance-based detection method for visual quantification of mercury ions on a microfluidic paper-based analytical device (mu PAD). Dithizone in NaOH solution was used as chromogenic reagent and deposited onto paper channel delimited by hydrophobic wax barrier. Reactions happened between mercury ions and dithizone to form an insoluble colored complex, producing colored precipitate on the paper channel. The length of colored precipitate could be readily measured using the printed ruler along each device. The length of precipitate increase linearly with the mercury concentrations, mercury in sample solution could be quantified by measuring the length of the colored precipitate. Being free of any electronic instruments, this method has the advantages of portability, ease of use, low cost and disposability. This presented methodwas used to detect mercury ions in a synthetic sample, demonstrating its potential in on-site and real time analysis. (C) 2017Author(s).
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页数：8
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