SN/T 5308-2021 食品級潤滑油中苯、甲苯、氯苯、對二甲苯和鄰二甲苯的測定 頂空氣相色譜—質(zhì)譜聯(lián)用法
本文件規(guī)定了食品級潤滑油中苯、甲苯、氯苯、對二甲苯和鄰二甲苯的頂空進樣 - 氣相色譜 -質(zhì)譜測定方法。
本文件適用于食品級潤滑油中含量不低于 0.1 mg/kg 的苯、甲苯、氯苯、對二甲苯和鄰二甲苯的測定。
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色譜柱：VOCOL 色譜柱，毛細管柱 60 m×0.32 mm ×1.8 μm。

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浩瀚色譜（山東）應(yīng)用技術(shù)開發(fā)有限公司，建立了頂空進樣-氣相色譜-質(zhì)譜聯(lián)用法(HS-GC/MS)同時測定食品級潤滑油中苯、甲苯、氯苯、對二甲苯、鄰二甲苯、α-甲基苯乙烯含量的分析方法。樣品用正己烷溶解后,選擇頂空平衡溫度和時間分別為105℃和15 min,選擇VOCAL色譜柱作為分離柱,采用GC/MS選擇離子掃描模式進行分析,外標(biāo)法定量。食品級潤滑油中6種苯系揮發(fā)物的添加回收率在83.49%~106.09%之間,相對標(biāo)準(zhǔn)偏差(RSD)為1.11%~9.73%,樣品中目標(biāo)化合物檢出限為0.01~0.05 mg/kg,方法的線性范圍為0.010~10.00 mg/L,能夠滿足食品級潤滑油中微量揮發(fā)性有機物的定量檢測。

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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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