Free and Total Glycerin in Biodiesel: Accurate Quantitation by Easy Ambient Sonic-Spray Ionization Mass Spectrometry

被引：22
作者：
Fernandes, Anna Maria A. P. [1 ]
Tega, David U. [2 ]
Jara, Jose L. P. [1 ]
Cunha, Ildenize B. S. [1 ]
de Sa, Gilberto F. [3 ]
Daroda, Romeu J. [4 ]
Eberlin, Marcos N. [1 ]
Alberici, Rosana M. [1 ]
机构：
[1] Univ Estadual Campinas, Univ Campinas, Inst Chem, ThoMSon Mass Spectrometry Lab, BR-13083970 Campinas, SP, Brazil
[2] Univ Estadual Campinas, Univ Campinas, Inst Chem, Analit Ctr, BR-13083970 Campinas, SP, Brazil
[3] Univ Fed Pernambuco, Dept Fundamental Chem, BR-50590470 Recife, PE, Brazil
[4] Natl Inst Metrol Qual & Technol INMETRO, BR-25250020 Duque De Caxias, RJ, Brazil
来源：
ENERGY & FUELS | 2012年 / 26卷 / 05期
基金：
巴西圣保罗研究基金会;
关键词：
QUALITY-CONTROL; ANIMAL FATS; OILS; TYPIFICATION; PLASMA; MS;
D O I：
10.1021/ef300399m
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Quantitation of free and total glycerin content in biodiesel is performed via a simple and direct ambient desorption/ionization mass spectrometric technique. Easy ambient sonic-spray ionization mass spectrometry (EASI-MS) is applied to either the crude or derivatized sample spiked with an internal standard allowing for immediate quantitation of free and total glycerin, a major quality parameter for biodiesel. The linear range obtained by EASI-MS for free glycerin was from 0.005 to 0.100% (m/m), and that for bound glycerin (mono-, di-, and triacylglycerides) was from 0.01 to 0.50% (m/m). These values are in concordance with those required by major regulatory agencies for biodiesel quality control, which are, for free glycerin, a 0.02% (m/m) maximum and, for total glycerin, a 0.25% (m/m) maximum. The simple and fast EASI(+)-MS protocol seems to offer a proper substitute or alternative for the more demanding and time-consuming gas chromatography with flame ionization detection (GC-FID) standard methodology.
引用
收藏
页码：3042 / 3047
页数：6
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