کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1208717 1493739 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Utility of 5 Å molecular sieves to measure carbon isotope ratios in lipid biomarkers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Utility of 5 Å molecular sieves to measure carbon isotope ratios in lipid biomarkers
چکیده انگلیسی

A procedure using 5 Å zeolite sorption to separate cyclic/branched organic compounds from the linear ones was developed and carbon isotopic fractionation effects were investigated in different families of compounds, e.g. within the hydrocarbon and alcohol compounds. The 5 Å sieve has a pore size such that only linear components can be incorporated into the pores whereas the cyclic/branched compounds are remaining free in the organic solution. The sorbed compounds were released from the molecular sieve with HF and solvent extracted with hexane. The method enables the isolation of linear saturated classes, such as n-alkanes and n-fatty alcohols from branched/cyclic compounds without isotopic fractionation for compound-specific isotope analysis (CSIA) of δ13C. However, alkene hydrocarbons, sterols and some aromatics were completely or partly degraded with the molecular sieve.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1165, Issues 1–2, 21 September 2007, Pages 172–181
نویسندگان
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