期刊
ANALYTICAL METHODS
卷 11, 期 42, 页码 5431-5438出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ay01580a
关键词
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资金
- Irish Research Council [GOIPG/2016/301]
- Institute of Technology Carlow President's Research Fellowship Programme fund
- Irish Research Council (IRC) [GOIPG/2016/301] Funding Source: Irish Research Council (IRC)
This work describes a novel system for arsenic detection in water using leucomalachite green dye in a microfluidic platform. A simplified leucomalachite green method was integrated into a microfluidic detection system. In acidic medium arsenic is reacted with potassium iodate to liberate iodine, which in turn oxidises leucomalachite green to malachite green forming a green colour associated with an absorbance band in the visible region (lambda(max) = 617 nm). A 1 : 1 v/v sample to reagent ratio was used for the analysis. Syringe pumps were used to introduce and transport reagents and samples into a PMMA microfluidic detection chip. The optical detection system consisted of a LED light source with a photodiode detector. The modified method can determine arsenic over the linear range of 0.3-2 mg L-1 with a limit of detection of 0.32 mg L-1. The average % RSD and recovery were 21.1% and 93.7%, respectively. The sample run time was optimised to 25 minutes. A range of environmental water samples were analysed using the modified method.
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