Czech J. Food Sci., 2025, 43(1):59-70 | DOI: 10.17221/159/2024-CJFS
Study on the geographical origin and characteristic differential components of Qianbei Ma lamb based on rapid evaporative ionization mass spectrometryOriginal Paper
- 1 Zunyi Product Quality Inspection and Testing Institute, Zunyi, China
- 2 College of Pharmacy, Zunyi Medical University, Zunyi, China
A rapid evaporative ionization mass spectrometry (REIMS) method combined with intelligent knife (iKnife) method was developed to explore the geographical origin and characteristic differential components of Qianbei Ma lamb. The REIMS conditions were initially refined, with the cauterization duration of 3 seconds, and the auxiliary solvent flow rate set to 100 μL·min–1 to prevent duplication. A database model was created from raw data through the proposed principal component analysis-linear discriminate analysis (PCA-LDA) in Live ID software, successfully applied to identify samples from 5 provinces in China and the real-time reliable identification rate with confidence higher than 99%. The obtained data by REIMS were used to establish the multivariate statistical models which using orthogonal projection to latent structures discriminant analysis (OPLS-DA), provided strong the discrimination power between composition and content changes of 16 specific ions such as m/z 726.3952 and m/z 744.4050, etc., including fatty alcohols, fatty acids and phosphatidylserines in mutton of different origin and the model displayed validation [R2(Y) = 0.968, Q2 = 0.924].
Keywords: REIMS; real-time discrimination; Qianbei Ma lamb; different origins; multivariate statistical analysis; chemometrics
Received: August 10, 2024; Revised: January 18, 2025; Accepted: January 28, 2025; Prepublished online: February 25, 2025; Published: February 28, 2025 Show citation
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