Fillet freshness detection method based on portable near-infrared spectrometer

Abstract

The invention belongs to the technical field of measurement, and discloses a fillet freshness detection method based on a portable near-infrared spectrometer and the spectrometer. The portable near-infrared spectrometer is used for spectrum acquisition, total volatile basic nitrogen (TVB-N) is measured by virtue of a Kjeldahl determination method. A mathematical model between the spectral data andthe measured TVB-N content is built through a chemometrics method,variable selection is carried out by using a three-step combination strategy, a TVB-N value is predicted through the established model, and the freshness of the fillets is evaluated according to the TVB-N value. The defects of large volume, complicated operation, inconvenient carrying and the like of a laboratory near-infrared spectrometer are solved, the detection can be carried out anytime and anywhere, and the operation is simple and convenient. In addition, a three-step combination strategy is used for variable selection, and data show that the method can obtain a result superior to that of a single algorithm and two-step combination.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a method for detecting the freshness of fish fillets based on a portable near-infrared spectrometer and a spectrometer. Background technique [0002] At present, as a fast and non-destructive analysis tool, near-infrared spectroscopy has been widely used in traditional Chinese medicine, petroleum, textiles, agricultural products and other fields. Near-infrared spectrometer is the main tool for near-infrared spectrum analysis. Traditional laboratory near-infrared spectrometers have the disadvantages of large volume, cumbersome operation, and inconvenient portability. It is not conducive to detection anytime and anywhere, which limits the development of near-infrared spectroscopy technology. In addition, in the application of variable selection methods, the newly developed variable selection algorithms are rarely used, especially the joint use of these algorithms, w...

AI Technical Summary

Problems solved by technology

Near-infrared spectrometer is the main tool for near-infrared spectrum analysis. Traditional laboratory near-infrared spectrometers have the disadvantages of large volume, cumbersome operation, and inconvenient portability. It is not conducive to detection anytime and anywhere, which limits the development of near-infrared spectroscopy technology.

In addition, in the application of variable selection methods, the newly developed variable selection algorithms are less used, especially the joint use of these algorithms, which makes the obtained results not ideal

[0003] Through the above analysis, the problems and defects of the prior art are: (1) the laboratory near-infrared spectrometer has a large volume, cumbersome operation, and is not easy to carry

[0004](2) The traditional fish fillet freshness detection method needs to destroy the sample during the operation, and the operation is cumbersome

[0005] The difficulties in solving the above problems and defects are as follows: (1) To measure the content of volatile base nitrogen (Total volatile base nitrogen, TVB-N) by traditional chemical method (Kjeldahl method), it is necessary to re-explore the experimental parameters

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