Research progress in traceability of agricultural products using stable isotope

With the enhancement of consumers' demands for the quality and safety of agricultural products, the traceability research of agricultural products keeps a good development trend. Stable isotope techniques are widely used in the research of agricultural products, including geographical origin traceability, authenticity identification and so on. In terms of geographical origin traceability, beef, mutton, milk, wine, honey, aquatic products, tea and grain have been investigated widely. It is difficult and important to narrow the scope of traceability area. The combination of stable isotope ratio with multi-element, amino acid and fatty acid content is the best way to narrow the traceability area. In terms of the authenticity of agricultural products, the variety and complexity of adulteration make it difficult for consumers to distinguish the true products. The fractionation of stable isotopes in agricultural products processing has been developed and gradually deepened. In this paper, the progress of the research on stable isotopes in the origin traceability, authenticity and fractionation process of agricultural products from 2015 to 2020 was reviewed. And the combination of stable isotope with other technologies for the geographical traceability of agricultural products was described. Furthermore, its deficiencies were summarized and prospected. (authors)