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Using near-infrared overtone regions to determine biodiesel content and adulteration of diesel/biodiesel blends with vegetable oils.
Anal Chim Acta. 2012 Feb 24; 716:101-7.AC

Abstract

This work evaluates the use of near-infrared (NIR) overtone regions to determine biodiesel content, as well potential adulteration with vegetable oil, in diesel/biodiesel blends. For this purpose, NIR spectra (12,000-6300 cm(-1)) were obtained using three different optical path lengths: 10 mm, 20 mm and 50 mm. Two strategies of regression with variable selection were evaluated: partial least squares (PLS) with significant regression coefficients selected by Jack-Knife algorithm (PLS/JK) and multiple linear regression (MLR) with wavenumber selection by successive projections algorithm (MLR/SPA). For comparison, the results obtained by using PLS full-spectrum models are also presented. In addition, the performance of models using NIR (1.0 mm optical path length, 9000-4000 cm(-1)) and MIR (UATR - universal attenuated total reflectance, 4000-650 cm(-1)) spectral regions was also investigated. The results demonstrated the potential of overtone regions with MLR/SPA regression strategy to determine biodiesel content in diesel/biodiesel blends, considering the possible presence of raw oil as a contaminant. This strategy is simple, fast and uses a fewer number of spectral variables. Considering this, the overtone regions can be useful to develop low cost instruments for quality control of diesel/biodiesel blends, considering the lower cost of optical components for this spectral region.

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Authors+Show Affiliations

de Vasconcelos FV
Departamento de Química, Universidade Federal da Paraíba, João Pessoa, Brazil.
de Souza PF
No affiliation info available
Pimentel MF
No affiliation info available
Pontes MJ
No affiliation info available
Pereira CF
No affiliation info available

MeSH

AlgorithmsBiofuelsLeast-Squares AnalysisLinear ModelsPlant OilsSpectroscopy, Near-Infrared

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22284883

Citation

de Vasconcelos, Fernanda Vera Cruz, et al. "Using Near-infrared Overtone Regions to Determine Biodiesel Content and Adulteration of Diesel/biodiesel Blends With Vegetable Oils." Analytica Chimica Acta, vol. 716, 2012, pp. 101-7.
de Vasconcelos FV, de Souza PF, Pimentel MF, et al. Using near-infrared overtone regions to determine biodiesel content and adulteration of diesel/biodiesel blends with vegetable oils. Anal Chim Acta. 2012;716:101-7.
de Vasconcelos, F. V., de Souza, P. F., Pimentel, M. F., Pontes, M. J., & Pereira, C. F. (2012). Using near-infrared overtone regions to determine biodiesel content and adulteration of diesel/biodiesel blends with vegetable oils. Analytica Chimica Acta, 716, 101-7. https://doi.org/10.1016/j.aca.2011.12.027
de Vasconcelos FV, et al. Using Near-infrared Overtone Regions to Determine Biodiesel Content and Adulteration of Diesel/biodiesel Blends With Vegetable Oils. Anal Chim Acta. 2012 Feb 24;716:101-7. PubMed PMID: 22284883.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Using near-infrared overtone regions to determine biodiesel content and adulteration of diesel/biodiesel blends with vegetable oils. AU - de Vasconcelos,Fernanda Vera Cruz, AU - de Souza,Paulo Fernandes Barbosa,Jr AU - Pimentel,Maria Fernanda, AU - Pontes,Márcio José Coelho, AU - Pereira,Claudete Fernandes, Y1 - 2011/12/21/ PY - 2011/10/18/received PY - 2011/12/10/revised PY - 2011/12/13/accepted PY - 2012/1/31/entrez PY - 2012/1/31/pubmed PY - 2012/5/15/medline SP - 101 EP - 7 JF - Analytica chimica acta JO - Anal Chim Acta VL - 716 N2 - This work evaluates the use of near-infrared (NIR) overtone regions to determine biodiesel content, as well potential adulteration with vegetable oil, in diesel/biodiesel blends. For this purpose, NIR spectra (12,000-6300 cm(-1)) were obtained using three different optical path lengths: 10 mm, 20 mm and 50 mm. Two strategies of regression with variable selection were evaluated: partial least squares (PLS) with significant regression coefficients selected by Jack-Knife algorithm (PLS/JK) and multiple linear regression (MLR) with wavenumber selection by successive projections algorithm (MLR/SPA). For comparison, the results obtained by using PLS full-spectrum models are also presented. In addition, the performance of models using NIR (1.0 mm optical path length, 9000-4000 cm(-1)) and MIR (UATR - universal attenuated total reflectance, 4000-650 cm(-1)) spectral regions was also investigated. The results demonstrated the potential of overtone regions with MLR/SPA regression strategy to determine biodiesel content in diesel/biodiesel blends, considering the possible presence of raw oil as a contaminant. This strategy is simple, fast and uses a fewer number of spectral variables. Considering this, the overtone regions can be useful to develop low cost instruments for quality control of diesel/biodiesel blends, considering the lower cost of optical components for this spectral region. SN - 1873-4324 UR - https://www.unboundmedicine.com/medline/citation/22284883/Using_near_infrared_overtone_regions_to_determine_biodiesel_content_and_adulteration_of_diesel/biodiesel_blends_with_vegetable_oils_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0003-2670(11)01692-8 DB - PRIME DP - Unbound Medicine ER -