The aim of our research was not only to qualitatively identify camellia oil, soya bean oil, rapeseed oil and corn oil, but also to quantitatively detect the soya bean oil in adulterated camellia oil. In this study, a FTIR method was investigated for discriminating camellia oil, soya bean oil, corn oil and rapeseed oil by comparison of two characteristic peaks height (1 122 cm-1, 1 096 cm-1) among those four edible oils. And it could identify pure camellia oil and camellia oil adulterated with soya bean oil(≥30%, w/w). In conjunction with PCA algorithm, a discrimination model was also developed for qualitative detecting camellia oils and other edible oils based on analyzing the FTIR fingerprint spectra in the range of 1 464～722 cm-1. After that, for quantitative determination of soya bean oil in adulterated camellia oil, a PLSR model with the detection limit of 1% (w/w) was provided. And it obtained RMSECV value of 0.032 0 for calibration sets and RMSEP value of 0.029 7 for validation sets. R2 of both sets could reach 0.99. In conclusion, with the characteristic of convenience, sensitivity, and accuracy, the FTIR spectroscopic methods established above has the capability for rapid verification of camellia oil adulteration in the edible oil market.
HAN Jianxun
,
SUN Ruixue
,
CHEN Ying
,
SUN Chongde
,
WEN Zhigang
. Discrimination of soya bean oil in adulterated camellia oil by FTIR spectroscopy combined with chemometrics[J]. Food and Fermentation Industries, 2019
, 45(18)
: 222
-227
.
DOI: 10.13995/j.cnki.11-1802/ts.020347
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