期刊
JOURNAL OF SEPARATION SCIENCE
卷 41, 期 5, 页码 1156-1163出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700992
关键词
dispersive liquid-liquid microextraction; gold nanoparticles; pesticides; surface plasmon resonance; ziram
资金
- Shahid Chamran University of Ahvaz [1394]
We have developed a reliable, fast, and highly sensitive analytical method utilizing dispersive liquid-liquid microextraction and gold nanoparticles probes for ziram (zinc bis(dimethyldithiocarbamate)) determination. The method is based on the in situ formation of gold nanoparticles in carbon tetrachloride as an organic phase. It was found that the trace levels of ziram influenced the formation of gold nanoparticles, leading to absorbance change of a sedimented phase. The results of the colorimetric ziram determination were in the concentration range of 0.12-2.52 ng/mL with a limit of detection of 0.06 ng/mL. The formation of the stable and dispersed gold nanoparticles in the organic phase provides a good precision for dispersive liquid-liquid microextraction method, resulting in the relative standard deviation of 3.8 and 1.2% for 0.56 and 1.58 ng/mL of ziram, respectively. This method has been successfully used for the ziram determination in samples of well and river water, soil, potato, carrot, wheat, and paddy soil.
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