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Determination of benzene in soft drinks by static headspace and gas chromatography-mass spectrometry
Author(s): Chen Zhi-feng, Sun Li, Chu Xiao-gang, Li Jun, Yong Wei, Dai Han-hui
Pages: 1033-
1035
Year: 2006
Issue:
9
Journal: CHINESE JOURNAL OF HEALTH LABORATORY TECHNOLOGY
Keyword: 顶空; 苯; 软饮料; GC-MS;
Abstract: 目的:建立顶空气相色谱质谱联用法测定软饮料中的微量苯.方法:采用静态顶空技术提取饮料样品中的微量苯,顶空温度为80℃,平衡时间为30 min,DB-5ms毛细管气相色谱柱分离苯与其他干扰物,采用质谱选择离子监测方式进行检测,保留时间定性,外标法定量,并依据选择离子丰度比进行确证.结果:苯在0.5~50.0μg/L范围内线性相关系数为0.996,回收率在85.2%~112.5%之间,相对标准偏差小于6%,测定低限为0.1μg/L.结论:该方法简单、准确、灵敏度高,适合于软饮料中微量苯的测定.
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