• 文献标题:   Dispersive solid-phase extraction for the determination of trace organochlorine pesticides in apple juices using reduced graphene oxide coated with ZnO nanocomposites as sorbent
  • 文献类型:   Article
  • 作  者:   SUN T, SUN HF, ZHAO F
  • 作者关键词:   dispersive solidphase extraction, graphene, organochlorine pesticide, zinc
  • 出版物名称:   JOURNAL OF SEPARATION SCIENCE
  • ISSN:   1615-9306 EI 1615-9314
  • 通讯作者地址:   Anyang Normal Univ
  • 被引频次:   5
  • DOI:   10.1002/jssc.201700599
  • 出版年:   2017

▎ 摘  要

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%.