Adsorption and Purification of Pesticides in Vegetables with Graphitized Carbon Black and Determination with Gas Chromatography-Mass Spectrometry

作者：Song Shu-Ling^*; Li Chong-Jiu; Ma Xiao-Dong; Rao Zhu; Wei Qian

来源：Chinese Journal of Analytical Chemistry, 2008, 36(11): 1526-1530.

• Vegetables
• pesticides
• graphitized carbon black
• gas chromatography-mass spectrometry

The adsorption behavior of graphitized carbon black ( GCB ) on the pesticides in vegetables was studied. The result shows that GCB has a strong adsorption for pesticides with hexagonal structure and pigment, especial for chlorophyll. The isotherm plots of GCB and active carbon show that adsorption ability of pigment is greatly different because of their different surface property. The different eluting solvents, the break volume and the eluting order were investigated. Based on the result, a multiresidue determination method of pesticides in vegetable was developed: the extract was purified by GCB, eluted by the mixture of acetone and ethyl acetate ( 1:1, v/v), and analyzed by gas chromatography mass spectrometry with selective ion storage technology. The limits of detection of all pesticides were in the range of 0. 002 - 0. 10 mg/kg.

• 出版日期2008-11
• 单位国家地质实验测试中心; 中国农业大学