Qualitative and Quantitative Analyses of Potassium Sorbate in Milk Powder using Terahertz Spectra

Using the terahertz time-domain spectroscopy system (THz-TDS), the potassium sorbate content in milk powder has been investigated. Firstly, the THz time-domain spectra of the samples were transformed into frequency spectra by Fourier transform, and then, through a set of simplified formulas of the o...

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Bibliographic Details
Published in:Journal of applied spectroscopy 2020-09, Vol.87 (4), p.764-772
Main Authors: Lian, F. Y., Fu, M. X., Xu, D. G.
Format: Article
Language:English
Subjects:
Absorption spectra
Analysis
Analytical Chemistry
Atomic/Molecular Structure and Spectra
Fourier transforms
Frequency spectrum
Least squares
Milk
Model accuracy
Neural networks
Physics
Physics and Astronomy
Potassium
Potassium sorbate
Preservatives
Qualitative analysis
Quantitative analysis
Refractivity
Regression analysis
Spectrum analysis
Support vector machines
Terahertz frequencies
Tetracycline
Tetracyclines
Time domain analysis
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Summary:Using the terahertz time-domain spectroscopy system (THz-TDS), the potassium sorbate content in milk powder has been investigated. Firstly, the THz time-domain spectra of the samples were transformed into frequency spectra by Fourier transform, and then, through a set of simplified formulas of the optical parameters, the THz absorption spectra and refractive index spectra were obtained. Based on the characteristic absorption peak of potassium sorbate, a quantitative analysis model of potassium sorbate in milk powder was constructed using ordinary least squares (OLS) linear regression. In the case of low content (
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-020-01067-2