Quantitative analysis of biodiesel in blends of biodiesel and conventional diesel by comprehensive two-dimensional gas chromatography and multivariate curve resolution

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• 作者：Noroska Gabriela Salazar Mogollon ; Fabiana Alves de Lima Ribeiro ; Monica Mamian Lopez ; Le ; ro Wang Hantao ; Ronei Jesus Poppi ; Fabio Augusto
• 关键词：Biodiesel ; Blends of biodiesel and conventional diesel ; Comprehensive two-dimensional gas chromatography ; Multivariate curve resolution ; Multiway principal component analysis
• 刊名：Analytica Chimica Acta
• 出版年：2013
• 出版时间：24 September, 2013
• 年：2013
• 卷：796
• 期：Complete
• 页码：130-136
• 全文大小：1563 K

文摘

In this paper, a method to determine the composition of blends of biodiesel with mineral diesel (BXX) by multivariate curve resolution with Alternating Least Squares (MRC-ALS) combined to comprehensive two-dimensional gas chromatography with Flame Ionization Detection (GC ¡Á GC-FID) is presented. Chromatographic profiles of BXX blends produced with biodiesels from different sources were used as input data. An initial evaluation carried out after multiway principal component analysis (MPCA) was used to reveal regions of the chromatograms were the signal was likely to be dependent on the concentration of biodiesel, regardless its vegetable source. After this preliminary step MCR-ALS modeling was carried out only using relevant parts of the chromatograms. The resulting procedure was able to predict accurately the concentration of biodiesel in the BXX samples regardless of its origin.