WANG Bing1 LEE Xin-qing1 YANG Fang1,2
(1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
2.Graduate University of the Chinese Academy of Sciences, Beijing 100049,China)
Abstract: The quality and traceability of agricultural products have become a hot issue all over the world. The multi-element and isotope tracing technique has been shown to be a valuable tool to discriminate agricultural products according to their original regions. By studying the multi-element and isotopic compositions as well as the corresponding relationship between the origin of agricultural products and soil, rocks, rainwater and surface water in the original regions, someone can determine the geographical origin and geochemical characteristics of agricultural products. At present, the technical methods, which are used to trace the geographical origin of agricultural products, have some deficiencies, such as isotope fractionation effect, more human disturbance and single method, and the accuracy is not sufficient, and thus can not reflect the actual geochemical characteristics of the original environment. Multi-element and strontium isotope tracing is a promising method. In this paper, on the basis of the recognition of the principle about the multi-element and strontium isotope tracing technique, the authors highlighted the current status and problems concerning the multi-element and other isotopes tracing technique, the superiority of origin traceability in the agriculture using multi-element and strontium isotope tracing technique and its prospects of application in agricultural products, looking forward to promoting research on and application of the multi-element and strontium isotope tracing techniques in the agricultural origin traceability field, which will be beneficial to the establishment and improvement of the traceability system for the agricultural products in the future.
Key words: strontium isotope; trace element; agricultural product; geographical origin; geochemistry
EARTH AND ENVIRONMENT Vol. 40, No.3, Tot No.289, 2012, Page 391-396