The invention provides a method for rapidly detecting the content of
aflatoxin in
brown rice based on an
attenuated total reflection Fourier transform infrared spectrum technique. The method comprises the following steps: preparing a sample: collecting
brown rice samples with different
aspergillus flavus invaded degrees, crushing the
brown rice samples so as to obtain sample
powder, and refrigerating for detecting; detecting by spectrum: scanning a spectrum
signal of a sample by adopting a
Fourier transform infrared spectroscopy, picking partial screened samples, and determining the level of
aflatoxin B1, B2, G1 and G2 and the total quantity thereof in the brown rice sample
powder; carrying out data preprocessing: preprocessing the original spectrum information of the sample
powder to eliminate interference; quantitatively predicting and analyzing: establishing a relevant
relational model of the real content level of
aflatoxin in the brown rice samples and the prediction level according to the correspondence of the level of the
aflatoxin B1, B2, G1 and G2 and the total quantity thereof in the brown rice samples and the corresponding spectrum adsorption value based on a
partial least squares regression (PLSR) method; and determining rapidly: outputting the
aflatoxin B1, B2, G1 and G2 and the total quantity level thereof based on the spectrum information of the to-be-detected brown rice by utilizing the established model.