摘要
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30min，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。
Objective：A new method was established for determination of benzene in soft drinks by static headspace and gas chromatography -mass spectrometry. Methods：The beadspace temperature was 80℃ and the equilibrium time was 30 min. DB - 5ms column was chosen to separate benzene from disturbance substances. The selective ion monitor method was used to improve detection sensitivity. Results：The linear range of the determination was 0. 5 - 50. 0 μg/L with the quantitative limit of 0. 1μg/ L. The recovery range was 85.2% - 112. 5% and the RSD was less than 6%. Conclusion：The method with simplicity, precision and high sensitivity befits to determine μg/L - grade benzene in soft drinks.
出处
《中国卫生检验杂志》
CAS
2006年第9期1033-1035,共3页
Chinese Journal of Health Laboratory Technology
