Please use this identifier to cite or link to this item:
http://repositorio.unicamp.br/jspui/handle/REPOSIP/67140
Type: | Artigo de periódico |
Title: | Free and Total Glycerin in Biodiesel: Accurate Quantitation by Easy Ambient Sonic-Spray Ionization Mass Spectrometry |
Author: | Fernandes, AMAP Tega, DU Jara, JLP Cunha, IBS de Sa, GF Daroda, RJ Eberlin, MN Alberici, RM |
Abstract: | 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. |
Country: | EUA |
Editor: | Amer Chemical Soc |
Citation: | Energy & Fuels. Amer Chemical Soc, v. 26, n. 5, n. 3042, n. 3047, 2012. |
Rights: | fechado |
Identifier DOI: | 10.1021/ef300399m |
Date Issue: | 2012 |
Appears in Collections: | Unicamp - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
WOS000304073000058.pdf | 1.73 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.