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Simultaneous detection of zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate in cabbage leaves by capillary electrophoresis with inductively coupled plasma mass spectrometry
Author(s) -
Chen Jinfa,
Fu Fengfu,
Wu Siying,
Wang Jing,
Wang Zongwen
Publication year - 2017
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201700455
Subject(s) - zinc , detection limit , chemistry , chromatography , inductively coupled plasma mass spectrometry , mass spectrometry , capillary electrophoresis , inductively coupled plasma , extraction (chemistry) , analytical chemistry (journal) , plasma , physics , organic chemistry , quantum mechanics
We report a simple and highly sensitive method for the simultaneous detection of trace zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate by capillary electrophoresis with inductively coupled plasma mass spectrometry. Zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate were chelated with trans ‐1,2‐diaminocyclohexane‐ N,N,N′,N′ ‐tetraacetic acid to form a macromolecule complex. Then, these two compounds were separated by α‐cyclodextrin‐modified capillary electrophoresis within 12 min at a separation voltage of 15 kV and measured by inductively coupled plasma mass spectrometry. The developed method is sensitive with detection limit of 1.9 and 3.0 ng Zn/mL for zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate, respectively. By means of ultrasound‐assisted extraction methods, zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate spiked into cabbage leaves were successfully extracted and determined with a relative standard deviation ( n = 5) ≤ 6% and a recovery of 95–107%.