Journal
JOURNAL OF SEPARATION SCIENCE
Volume 40, Issue 18, Pages 3725-3733Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700599
Keywords
dispersive solid-phase extraction; graphene; organochlorine pesticides; zinc
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Funding
- Henan Province Key Laboratory of New Opto-Electronic Functional Materials [aynu201710, AYNU-KP-B06]
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In this work, reduced graphene oxide coated with ZnO nanocomposites was used as an efficient sorbent of dispersive solid-phase extraction and successfully applied for the extraction of organochlorine pesticides from apple juice followed by gas chromatography with mass spectrometry. Several experimental parameters affecting the extraction efficiencies, including the amount of adsorbent, extraction time, and the pH of the sample solution, as well as the type and volume of eluent solvent, were investigated and optimized. Under the optimal experimental conditions, good linearity existed in the range of 1.0-200.0 ng/mL for all the analytes with the correlation coefficients (R-2) ranging from 0.9964 to 0.9994. The limits of detection of the method for the compounds were 0.011-0.053 ng/mL. Good reproducibilities were acquired with relative standard deviations below 8.7% for both intraday and interday precision. The recoveries of the method were in the range of 78.1-105.8% with relative standard deviations of 3.3-6.9%.
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