食品科学 ›› 2021, Vol. 42 ›› Issue (24): 276-282.doi: 10.7506/spkx1002-6630-20210104-025

• 安全检测 • 上一篇    

基于多元统计分析的牛排掺假定量判别及差异分析

张颖颖,王守伟,康超娣,张明悦,李莹莹   

  1. (北京食品科学研究院,中国肉类食品综合研究中心,北京 100068)
  • 发布日期:2021-12-30
  • 基金资助:
    国家自然科学基金青年科学基金项目(31801639)

Quantitative Discrimination and Differential Analysis of Steak Adulteration Based on Multivariate Statistical Analysis

ZHANG Yingying, WANG Shouwei, KANG Chaodi, ZHANG Mingyue, LI Yingying   

  1. (Beijing Academy of Food Sciences, China Meat Research Center, Beijing 100068, China)
  • Published:2021-12-30

摘要: 结合市场对食品中不同成分的定量分析的需求,模拟不同比例混合样品,利用高分辨质谱进行数据采集及分析,分别考察主成分分析、偏最小二乘判别分析和正交偏最小二乘判别分析(orthogonal partial least squares-discrimination analysis,OPLS-DA)统计方法对不同混合比例的样品数据进行分析。相比之下,OPLS-DA模型具有更好的判别效果。通过进行S-Plot分析,分别筛选出25?条猪源多肽及牛源多肽,经线性拟合分析,其中牛源的10?条多肽和猪源的6?条多肽的线性相关系数R2大于0.99,并开展了真实性样品的验证实验,证明筛选的多肽可用于预计样品中的成分含量。这项研究建立了一种量化牛排的方法,并为筛选差异显著性的定量多肽提供新思路。

关键词: 多元统计分析;正交偏最小二乘判别分析;差异多肽;定量分析

Abstract: In this study, considering the current market demand for quantitative analysis of adulterated samples, beef samples adulterated with different proportions of pork were analyzed by high-resolution mass spectrometry (HRMS), and the acquired data were evaluated by principal component analysis (PCA), partial least squares-discrimination analysis (PLS-DA), and orthogonal partial least squares-discrimination analysis (OPLS-DA). The results showed that the OPLS-DA model exhibited a better discriminative ability compared with the other methods. By sorting the S-plot values, 25 porcine-derived peptides and 25 bovine-derived peptides were selected. The linear correlation coefficients (R2) for 10 bovine-derived peptides and 6 porcine-derived peptides were above 0.99. Confirmatory experiments showed that the selected peptides could be used to predict the contents of adulterants in real samples. This study has established a method for quantifying the adulteration of beef steak and provided a new idea for screening of significantly differential peptides useful for the quantification of adulteration of meat products.

Key words: multivariate statistical analysis; orthogonal partial least squares-discrimination analysis; significantly differential peptides; quantitative analysis

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