کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1198688 1493505 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gas chromatography with tandem differential mobility spectrometry of fatty acid alkyl esters and the selective detection of methyl linolenate in biodiesels by dual-stage ion filtering
ترجمه فارسی عنوان
کروماتوگرافی گاز با اسپکترومتر تحرک دیفرانسیل دو طرفه اسید اسیدهای چرب اسید و شناسایی انتخابی متیل لینولنات در بیودیزل های با فیلتر یون های دو مرحله ای
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Alkyl esters of fatty acids (FAAEs) with carbon numbers from 8 to 20 formed protonated monomers and proton bound dimers through atmospheric pressure chemical ionization reactions and these gas ions were characterized for their field dependent mobility coefficients using differential mobility spectrometry (DMS). Separation of ion peaks with a vapor modifier was achieved for ions with masses of 317-1033 Da though the differences in these coefficients and the resolution of ion peaks decreased proportionally with increased ion mass. Differences in dispersion curves were sufficient to isolate ions from specific FAAEs in the effluent of a gas chromatograph by dual stage ion filtering using a tandem DMS detector. Methyl linolenate was isolated from nearby eluting methyl oleate, methyl stearate and methyl linoleate within analysis times of 10 s without measureable complications from charge suppression in the ion source or leakage in filtering of ions with close proximity of dispersion behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1421, 20 November 2015, Pages 162-170
نویسندگان
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