Identification of the Age of Aged Vinegar Based on Two-dimensional Correlation Near Infrared Spectroscopy
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(1.College of Agricultural Engineering, Shanxi Agricultural University, Taigu 030801, Shanxi ;2.College of Food Science And Engineering, Shanxi Agricultural University, Taigu 030801, Shanxi)

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    Abstract:

    Two-dimensional correlation NIR spectroscopy was combined with discriminant analysis (DA) method for the identification of aged vinegar samples of different vinegar ages. A total of 100 aged vinegar samples of five different vinegar ages were selected, and the 1D NIR spectra of all samples were collected at room temperature. The two-dimensional correlation synchronous spectra and asynchronous spectra of each sample in the wavelength range of 1 001-1 830 nm were constructed with the age of vinegar as the external disturbance factor, and the spectral characteristics of the two-dimensional correlation spectra of the samples were analyzed. Based on the diagonal data (autocorrelation spectrum) of the two-dimensional correlation synchronous spectra, a discriminant analysis model was established for the old aged vinegar samples with different vinegar ages, and the identification accuracy of the model calibration set was 97.3% and that of the prediction set was 96%. The results showed that the proposed method could provide more spectral feature information with vinegar age, and provide a classification model with higher accuracy for the rapid identification of aged vinegar.

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  • Received:
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  • Online: September 01,2023
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