title: [Determination of alachlor residue in agricultural products].
abstract: A method of the determination of alachlor residue in agricultural products was developed. Four different kinds of objects, corn, peanut, spinach, and orange were selected as representatives of main agricultural products. The sample was extracted with acetone-water (8:2, v/v). The extract was partitioned with dichloromethane, cleaned up by gel permeation chromatography (GPC) and solid phase extraction (SPE) in order to completely separate colorants from alachlor in the sample. The eluate was evaporated under vacuum to nearly dry and diluted with acetone to a definite volume. The solution was determined and identified by gas chromatography-mass spectrometry (GC-MS) using external standard method. The recoveries were 86.0%-98.2%, and relative standard deviations were 5.1%-6.7% with spiked at 0.010-0.200 mg/kg of alachlor in blank samples. The limit of quantification of this method was 0.010 mg/kg.
authors.affiliation: Jilin Entry-Exit Inspection & Quarantine Bureau, Changchun 130062, China. wangmt@jlciq.gov.cn
authors.forename: Mingtai
authors.initials: M
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Mou
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhou
authors.forename: Liguo
authors.initials: L
authors.lastname: Song
authors.forename: Dachuan
authors.initials: D
authors.lastname: Han
mesh_terms: D000081:Acetamides / Q000032:analysis* / Q000737:chemistry; D010367:Arachis / Q000737:chemistry; D002850:Chromatography, Gel; D032084:Citrus sinensis / Q000737:chemistry; D018556:Crops, Agricultural / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000032:analysis* / Q000737:chemistry; D052616:Solid Phase Extraction; D018724:Spinacia oleracea / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry
chemical_list: D000081:Acetamides; D006540:Herbicides; C000188:alachlor