Assuring food safety and traceability of polished rice from different production regions in China and Southeast Asia using chemometric models. (May 2019)

• Record Type: Journal Article
• Authors: Liu, Zhi; Zhang, Weixing; Zhang, Yongzhi; Chen, Tianjin; Shao, Shengzhi; Zhou, Li; Yuan, Yuwei; Xie, Tongzhou; Rogers, Karyne M.
• Is Part Of: Food control. Volume 99(2019)
• Page Start: 1
• Page End: 10
• Publication Date: 2019-05
• Subjects: Polished rice -- Stable isotopes -- Multielement -- Origin -- Traceability -- Chemometrics; Food -- Quality -- Periodicals; Food -- Analysis -- Periodicals; Food handling -- Periodicals; Food industry and trade -- Quality control -- Periodicals; Aliments -- Industrie et commerce -- Qualité -- Contrôle -- Périodiques; Aliments -- Qualité -- Périodiques; Aliments -- Analyse -- Périodiques; Hygiène alimentaire -- Périodiques; Food -- Analysis; Food handling; Food -- Quality; Periodicals; Electronic journals; 664.07
• DOI: 10.1016/j.foodcont.2018.12.011
• Languages: English
• ISSNs: 0956-7135

Abstract

Abstract: A novel strategy combining elemental analysis-isotopic ratio mass spectrometry (EA-IRMS) and inductively plasma coupled mass spectrometry (ICP-MS) analysis with chemometric data-processing was applied to differentiate polished rice from different growing regions in China with rice imported from Southeast Asia (Thailand and Malaysia). Seven stable isotope ratios (i.e. δ 13 C, δ 15 N, δ 2 H, δ 18 O, 87/86 Sr, 207/206 Pb and 208/207 Pb) and 25 multielemental concentrations (Na, Ca, Fe, Zn, Rb, Ag, and Cd, etc.) were assayed and used to establish principal component analysis (PCA) and step-wise linear discriminant analysis (LDA) modeling to determine the rice's geographical origin. The prediction accuracies were cross-validated, and "blind sample" tests were all higher than 90.0% for rice samples from different production areas in China and 85.0% for rice imported from Southeast Asia, respectively. The high level of geographical traceability when combining stable isotope and multielement fingerprints with chemometric data-processing provides a promising tool to assure the origin of Chinese polished rice. This authentication method protects premium rice brands, combats commercial fraud, and quickly locates the origin of contaminated Cd rice to add verifiable food safety measures for consumers. Highlights: Isotopes and trace elements were used to determine traceability of Chinese rice. Chemometric approaches significantly enhanced the classification capacity. Rice samples from different geographical origins were accurately discriminated. Incidences of rice contaminated with heavy metals found in supermarkets in China.