关键词: 苹果, 基质固相分散萃取, 气相色谱, 农药多残留分析, 有机磷, 有机氯, 拟除虫菊酯

Abstract: Abstract: 【Objective】To study the multi-residue analytical methods of organophsphorous, organochlorine and pyrethroid pesticides in apples by matrix solid-phase dispersion and gas chromatography(MSPD-GC). 【Method】The MSPD-GC methods for the simultaneous determination of 35 pesticides in apples was established through the experimentation of chromatographic instrumentation working condition, choice test of materials for MSPD extraction, the ratio of solid-phase material to sample, the elution tests, and the recovery trials at different fortification levels. 【Result】The MSPD-GC method for simultaneously analysis of 35 pesticide residues in apples was optimized and established in this study, The method has shown good recovery (78.6%-104.68%) for various levels of spiked samples, the coefficient variations(CV) were ≤4.15% for all pesticides studied. The limit of detection(LOD) of all pesticide residues were lower than their maximal residues limit(MRL). 【Conclusion】 The proposed method is easier to perform, faster, higher recoveries and sensitivity, consumes less sample and organic solvents. It can meet the demands of practical use for the simultaneous determination of multi-residue pesticides in apples.

Key words: apple, matrix solid-phase dispersion extraction, gas chromatograph, multi-residue of pesticides analysis