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Application of a Portable Handheld Infrared Spectrometer for Quantitation of trans Fat in Edible Oils
Author(s) -
Birkel Emily,
RodriguezSaona Luis
Publication year - 2011
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-011-1814-z
Subject(s) - fourier transform infrared spectroscopy , partial least squares regression , chemometrics , calibration , mobile device , spectrometer , near infrared spectroscopy , fourier transform , multivariate statistics , analytical chemistry (journal) , chemistry , mathematics , chromatography , computer science , statistics , engineering , chemical engineering , mathematical analysis , physics , quantum mechanics , operating system
Trans fat poses serious health risks to consumers. In order to meet the FDA labeling requirements for trans fatty acids, development of fast, accurate, easy‐to‐use analytical methods for oils, fats and related products is desirable. Fourier transform infrared spectroscopy (FTIR) is a well‐established analytical technique for quantifying trans fats, and the development of handheld FTIR units over the past decade presents new application opportunities. Our objective was to evaluate the performance of a handheld FTIR sensor for measuring trans fat content between 0.1 and 20% trans (w/w) in edible saturated and unsaturated oils. Calibration models were built by measuring height of the band at 966 cm −1 and by partial least squares regression (PLSR) using benchtop FTIR as a reference method. Predictive accuracy of the models was validated with an independent test set of commercial edible oils. Calibration models developed using PLSR and linear regression of band heights gave correlation coefficients R 2 > 0.98. Multivariate analysis for the handheld unit gave standard error of prediction (SEP) of approximately 1%, comparable to values obtained with benchtop systems. This study demonstrates that handheld FTIR spectroscopy coupled with chemometrics is a suitable method for quantitation of trans fat content.

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