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海水悬浮颗粒物质中烷烃的毛细管气相色谱法测定
叶新荣1, 朱桂海1
国家海洋局第二海洋研究所
摘要:
本文报道应用玻璃毛细管气相色谱法测定海水悬浮颗粒物质中正构烷烃和异构烷烃组分的分析方法,该方法分辨率高和灵敏度高,测试的精密度和准确度较好,适用于海洋生物地球化学研究。
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DETERMINATION OF ALKANES IN SUSPENDED PARTICULATE MATTER BY CAPILLARY GAS CHROMAT0GRAPHY
Abstract:
The suspended particulate was obtained from sea water by filtration on glass filters. Total particulate lipids were extracted in a Soxhlet apparatus using 5:2 mixture of dichlor-methane and methanol. Internal standard was added to each extract in order to evaluate the effciency of the following analytical steps. The extract was saponified by 2mol/L CH3OH-KOH, unsaponifiable fraction was extracted by dichlormethane-n-hexane 1:1. The extracts were separated by adsorption chromatography on a column filled with SiO2. Eluted alkanes fraction were determinated by MPPS chemical bond glass capillary column gas chromatography. The method of internal standard was used in quantitative analysis. Datawere corrected for losses during laboratory work-up, using recovery of the internal standard. Therefore analytical results was satisfactory.
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