NIR news - Abstract of Predicting methanol and water content in biodiesel by near infrared spectroscopy

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NIR news
Volume 19 Issue 3, Pages 7–9 (2008)
doi: 10.1255/nirn.1071

Predicting methanol and water content in biodiesel by near infrared spectroscopy

Pedro Felizardo,^a Patrícia Baptista,^a José C. Menezes^b and M. Joana Neiva Correia^a
^aCentre for Chemical Processes, IST, Technical University of Lisbon, Av. Rovisco Pais, 1049–001, Lisbon, Portugal
^bIBB, Centre for Biological and Chemical Engineering, IST, Technical University of Lisbon, Av. Rovisco Pais, 1049–001, Lisbon, Portugal

ABSTRACT:

Conventional analyses of biodiesels are very expensive and time-consuming and near infrared (NIR) spectroscopy in combination with multivariate data analysis appears potentially to be a cheaper and faster alternative. This articleanalyses the effect of applying several commonly used pre-processing techniques prior to the application of PLS and PCR, on the quality of the calibration models developed to relate the NIR spectrum of biodiesel and its content of methanol and water.

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