Near-infrared detection method for lysine content in muscle freeze-dried powder of Yunnan native chickens

Abstract

The invention relates to a near-infrared detection method for lysine content in muscle freeze-dried powder of Yunnan native chickens, and belongs to the technical field of poultry body composition detection. The method particularly comprises the following steps: 1) preparing leg muscle or pectoral muscle fresh samples of the Yunnan native chickens into freeze-dried powder, putting into a polyethylene self-sealing bag with the thickness being 6 filaments; 2) scanning a near-infrared spectrum of the samples, wherein the wavenumber range of spectrum scanning is 3996 to 10002 cm<-1> and the resolution is 8 cm<-1>,taking the single layer of the 6-filament self-sealing bag to be placed in front of a probe to remove background effects while scanning the spectral background, scanning each sample for 3 times, and taking the average value of the scanning as spectral data of the samples, wherein each spectrum has 1558 absorbance values; 3) after preprocessing the absorbance of the samples with SNV, then performing preprocessing by a Gap-segment-order derivative method; 4) substituting preprocessed absorbance data in the wavenumber range of 4050 to 9949 cm<-1> into a model formula, thus obtaining the lysine content of the samples. The near-infrared detection method for the lysine content in the muscle freeze-dried powder of the Yunnan native chickens has the advantages of high forecastingspeed, non-destructive samples, suitability for large-scale sample detection and the like.

Description

technical field [0001] The technical field of chemical composition analysis of livestock and poultry products of the present invention, in particular, relates to a near-infrared detection method for lysine content in Yunnan local chicken muscle freeze-dried powder. Background technique [0002] Lysine is a basic amino acid, which is an essential amino acid for both poultry and human body. It is the first limiting amino acid for human body and the second limiting amino acid for poultry. Its main function is for protein synthesis. In the "ideal amino acid" model of poultry, all amino acid requirements are referenced to lysine, so once the information on lysine requirements is wrong, everything else will be wrong, so lysine has always been an important ingredient in animal nutrition. research hotspots in the field. [0003] Yunnan Province is located in the southwestern border of China, near the Tropic of Cancer. The terrain is high in the north and low in the south, with a la...

AI Technical Summary

Problems solved by technology

In the current research on the near-infrared analysis of chicken, it is basically the research on the breast muscle. Few scholars have done research on the mixed samples of the leg and breast muscle. In the production and consumption of chicken, the leg muscle is also a very important part of chicken. , so there is still a lack of research on leg muscles

However, there is no relevant report on the quantitative detection model of chicken near-infrared lysine

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