Head-Space GC Determination of Residual Amounts of Benzene, Toluene, Ethylbenzene, m-Xylene and n-Hexane in Characteristic Agricultural Products
摘 要
采用顶空-气相色谱法测定特色农产品中苯、甲苯、乙苯、间二甲苯和正己烷的残留量。选择顶空进样器的平衡温度和时间分别为130 ℃和50 min,用DB-624色谱柱分离,火焰离子化检测器检测。5种化合物的质量浓度均在30 mg·L-1以内与其峰面积呈线性关系,方法的检出限(3S/N)在0.3~0.6 mg·L-1之间。在3个浓度水平上做回收试验,回收率在88.1%~103%之间,相对标准偏差(n=6)在0.38%~2.8%之间。
Abstract
Head-space GC was applied to the determination of residual amounts of benzene, toluene, ethylbenzene, m-xylene and n-hexane in characteristic agricultural products. The equilibrium temperature and time of head space sampler were set at 130 ℃ and 50 min, respectively. The analytes were separated on DB-624 column and detected by FID. Linear relationships between values of peak area and mass concentration of the 5 compounds were kept in the same range within 30 mg·L-1. Detection limits (3S/N) found were ranged from 0.3 to 0.6 mg·L-1. Tests for recovery were performed by addition of mixed standard of the 5 compounds at 3 concentration levels for 6 parallel determinations, results of recovery found were in the range of 88.1%-103% with RSD′s in the range of 0.38%-2.8%.
中图分类号 O657.7
所属栏目 工作简报
基金项目 伊犁师范学院有机重点学科开放课题(2013ylsyy004)
收稿日期 2013/7/22
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联系人作者李紫薇(yili92@163.com)
备注李紫薇(1970-),女,山东梁山人,副教授,研究方向为食品分析、天然产物有效成分的研究。
引用该论文: LI Zi-wei,LIU Jun,OUYANG Yan,ZHU Ning. Head-Space GC Determination of Residual Amounts of Benzene, Toluene, Ethylbenzene, m-Xylene and n-Hexane in Characteristic Agricultural Products[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2013, 49(12): 1454~1457
李紫薇,刘俊,欧阳艳,朱宁. 顶空-气相色谱法测定特色农产品中苯、甲苯、乙苯、间二甲苯和正己烷的残留量[J]. 理化检验-化学分册, 2013, 49(12): 1454~1457
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参考文献
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【7】刘俊,贾丽君,田延河,等.自动顶空气相色谱法同时测定食品包装材料中残留氯乙烯、1,1-二氯乙烷和1,2-二氯乙烷单体[J].中国卫生检验, 2011,21(12):2821-2823.
【2】胡慧廉,丁乃立,吴莲珍,等.顶空气相色谱法测定三氯蔗糖中有机溶剂残留量[J].食品研究与开发, 2007,28(11):127-129.
【3】石允生,刘业亮.顶空气相色谱法测定食用植物油中残留溶剂的研究[J].中国卫生检验, 2005,15(5):548-549.
【4】郭建琴,李庭俊,潘芙蓉,等.植物油类残留溶剂测定方法试验及实测样品结果分析[J].河南预防医学杂志, 1999,10(5):299-230.
【5】李欣欣,梁学凯,冯国栋,等.水中苯系物的测定方法[J].现代仪器, 2007,13(1):14-18.
【6】熊中强,于艳军,李宁涛,等.食品包装材料中的挥发性与迁出性有机残留的检测-顶空气相色谱法[J].中国卫生检验杂志, 2009,19(6):1237-1241.
【7】刘俊,贾丽君,田延河,等.自动顶空气相色谱法同时测定食品包装材料中残留氯乙烯、1,1-二氯乙烷和1,2-二氯乙烷单体[J].中国卫生检验, 2011,21(12):2821-2823.
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