To evaluate the utility of Sr/Sr ratio for determining the geographical provenance of vegetables, we compared Sr/Sr ratios and Sr concentrations in five vegetable species grown in Japan and China, and we also examined the relationships between Sr/Sr ratios in vegetables, the soil-exchangeable pool, irrigation water, and fertilizer from 20 Japanese agricultural areas. The vegetable Sr/Sr ratios in Japan were similar for all species within a given agricultural area, but tended to be low in northeast Japan and high in southwest Japan. The median Sr/Sr ratio in Japanese vegetables was similar to that in fertilizer, suggesting that in addition to rock-derived Sr, vegetables contain Sr derived from fertilizers. In most cases, the Sr/Sr ratios for the Japanese and Chinese vegetables differed by approximately 0.710. Linear discriminant analysis using both Sr/Sr and the Sr concentration allowed more accurate discrimination between vegetables from the two countries.
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| http://dx.doi.org/10.1016/j.foodchem.2017.06.027 | DOI Listing |
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