SN/T 5308-2021 食品级润滑油中苯、甲苯、氯苯、对二甲苯和邻二甲苯的测定 顶空气相色谱—质谱联用法
本文件规定了食品级润滑油中苯、甲苯、氯苯、对二甲苯和邻二甲苯的顶空进样 - 气相色谱 -质谱测定方法。
本文件适用于食品级润滑油中含量不低于 0.1 mg/kg 的苯、甲苯、氯苯、对二甲苯和邻二甲苯的测定。
色谱柱：VOCOL 色谱柱，毛细管柱 60 m×0.32 mm ×1.8 μm。
浩瀚色谱（山东）应用技术开发有限公司，建立了顶空进样-气相色谱-质谱联用法(HS-GC/MS)同时测定食品级润滑油中苯、甲苯、氯苯、对二甲苯、邻二甲苯、α-甲基苯乙烯含量的分析方法。样品用正己烷溶解后,选择顶空平衡温度和时间分别为105℃和15 min,选择VOCAL色谱柱作为分离柱,采用GC/MS选择离子扫描模式进行分析,外标法定量。食品级润滑油中6种苯系挥发物的添加回收率在83.49%~106.09%之间,相对标准偏差(RSD)为1.11%~9.73%,样品中目标化合物检出限为0.01~0.05 mg/kg,方法的线性范围为0.010~10.00 mg/L,能够满足食品级润滑油中微量挥发性有机物的定量检测。
SN/T 5308-2021 Determination of benzene, toluene, chlorobenzene, p-xylene, and o-xylene in food grade lubricating oils by headspace gas chromatography-mass spectrometry
This document specifies the headspace injection gas chromatography-mass spectrometry method for the determination of benzene, toluene, chlorobenzene, p-xylene, and o-xylene in food grade lubricating oils.
This document is applicable to the determination of benzene, toluene, chlorobenzene, p-xylene, and o-xylene in food grade lubricants with a content not less than 0.1 mg/kg.
Chromatographic column: VOCOL chromatographic column, capillary column 60 m x 0.32 mm x 1.8 μ M.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a headspace injection gas chromatography-mass spectrometry (HS-GC/MS) method for simultaneous determination of benzene, toluene, chlorobenzene, p-xylene, o-xylene in food grade lubricating oil α- Analysis method for methylstyrene content. After dissolving the sample in n-hexane, the headspace equilibrium temperature and time were selected to be 105 ℃ and 15 min, respectively. VOCAL chromatography column was selected as the separation column, and GC/MS was used to select ion scanning mode for analysis. The external standard method was used for quantification. The recovery rates of six benzene volatile compounds added to food grade lubricating oil ranged from 83.49% to 106.09%, with a relative standard deviation (RSD) of 1.11% to 9.73%. The detection limit of target compounds in the sample was 0.01 to 0.05 mg/kg, and the linear range of the method was 0.010 to 10.00 mg/L. This method can meet the quantitative detection of trace volatile organic compounds in food grade lubricating oil.
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