GC Determination of Residual Amounts of 22 Polychlorobiphenyl′s in Vegetables
摘 要
用丙酮及正己烷(1+1)混合溶剂在ASE 200型微波提取仪中提取蔬菜样品,所得提取液经无水硫酸钠脱水后蒸缩至近干,用正己烷熔解残渣,所得溶液通过弗罗里硅柱纯化.用正己烷淋洗弗罗里硅层析柱,收集合并淋出液,蒸缩后定容为2.0 mL,供气相色谱测定.所测定的22种多氯联苯的质量浓度与各自对应的峰面积在一定范围内呈线性关系,由各线性回归方程求得的相关系数均在0.999以上.以大白菜样品作基体,加入22种多氯联苯单体的混合标准溶液作方法的回收试验,测得回收率在84.0%~99.0%之间.在一种浓度的混合标准溶液水平上进行6次测定,求得相对标准偏差在0.90%~2.69%之间.
Abstract
Vegetable sample was extracted with a mixture of acetone and n-hexane (1+1) in the ASE 200 Microwave Extractor.The extract was dehydrated with anhydrous Na2SO4 and evaporated to near dryness.The residue was dissolved in n-hexane and purified by passing through Florisil column.The column was eluted with n-hexane,and the eluates collected were combined and evaporated to a volume of 2.0 mL which were used for GC analysis.Linear relationships between values of peak area and mass concentration of monomers of the 22 polychlorobiphenyl′s (PCBP′s) were obtained in definite ranges,with correlation coefficients over 0.999 as shown by their linear regression equations.Tests for recovery were made by adding mixed standard solutions of the 22 PCBP monomers to a same matrix sample of Chinese cabbage,values of average recovery found were in the range of 84.0% to 99.0%.Values of RSD′s (n=6) found at one concentration level of the mixed standard solution were in the range of 0.90%-2.69%.
中图分类号 O657.7
所属栏目 工作简报
基金项目 广西青年基金项目(桂科青0728011)课题;食品药品及公共安全检测技术服务平台建设(08-05-01D)
收稿日期 2009/6/22
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备注劳燕文(1967-),女,广西灵山人,工程师,主要研究方向为有机生化分析研究.
引用该论文: LAO Yan-wen,YANG Yi-lin. GC Determination of Residual Amounts of 22 Polychlorobiphenyl′s in Vegetables[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(11): 1253~1255
劳燕文,杨益林. 气相色谱法测定蔬菜中22种多氯联苯残留量[J]. 理化检验-化学分册, 2010, 46(11): 1253~1255
被引情况:
【1】范磊,黄素华,田霆,何日安,周华俏,黄可尊, "气相色谱-串联质谱法测定水中多氯联苯",理化检验-化学分册 49, 1479-1482(2013)
【2】李刚,程柯森,丁波涛, "超声萃取分离-气相色谱-质谱法测定土壤中的3种酰胺类化合物含量",理化检验-化学分册 52, 687-690(2016)
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参考文献
【1】胡华,王政华.多氯联苯类污染物对人类健康的影响[J].长沙民政职业技术学院学报,2007,14(1):121-126.
【2】赵高峰.电子垃圾中多氯联苯的环境转移和潜在的健康风险[D].武汉:中国科学院水生生物研究所,2006:18.
【3】刘芡.食品中多氯联苯的污染及其控制[J].职业与健康,2007,23(13):1145-1147.
【4】GB/T 5009.190-2003海产品中多氯联苯的测定[S].
【2】赵高峰.电子垃圾中多氯联苯的环境转移和潜在的健康风险[D].武汉:中国科学院水生生物研究所,2006:18.
【3】刘芡.食品中多氯联苯的污染及其控制[J].职业与健康,2007,23(13):1145-1147.
【4】GB/T 5009.190-2003海产品中多氯联苯的测定[S].
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