Determination of biodiesel adulteration with raw vegetable oil from ATR-FTIR data using chemometric tools

Journal of the Brazilian Chemical Society

Soares, Itânia P¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brazil¹  Fortes, Isabel C. P¹  Santos, Cláudio G. dos¹  Embrapa Agroenergia, Brasília, Brazil¹  Universidade Federal de Ouro Preto, Ouro Preto, Brazil¹  Pereira, Rita de Cássia. C¹  Rezende, Thais F¹ 

关键词: biodiesel adulteration;    multivariate calibration;    ATR-FTIR;   

DOI  :  10.1590/S0103-50532011000700005

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Three different biodiesel sources (cotton, castor and palm) were adulterated with raw soybean oil at concentrations ranging from 1-40% (m/m). These samples were analyzed by infrared spectrometry (MIR) and their spectra were studied at three different spectral ranges: full spectrum (4000-665 cm-1), and the spectral ranges of 1800-1700 cm-1 and 1800-1000 cm-1. To determine the source of biodiesel used in the adulterated system, the data were analyzed by PCA (principal components analysis) spectral analysis tool and the best segregation of the sources was obtained at the range of 4000-665 cm-1. The explained variance was of 99% for the first three components. To quantify the raw soybean oil partial least squares (PLS) tool was applied. The best results were obtained for the spectral range of 1800-1000 cm-1, with values of RMSEP (root mean square error of prediction) varying from 1.10 to 1.47% (m/m).

【 授权许可】

Unknown