Geographical origin of polished rice based on multiple element and stable isotope analyses
Geographical origin of polished rice based on multiple element and stable isotope analyses
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DOI：
10.1016/j.foodchem.2007.12.063
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发表时间：
2008-07-15
期刊：
影响因子：
8.8
通讯作者：
Korenaga, Takashi
中科院分区：
文献类型：
--
作者：
Suzuki, Yaeko;Chikaraishi, Yoshito;Korenaga, Takashi
我们测定了精米的碳、氮含量（C和N含量）和稳定的碳、氮、氧同位素组成（δ C-13、δ N-15和δ O-18），以建立一种判别其地理来源的简单方法。作为第一次尝试，我们对来自澳大利亚（n = 1）、日本（n = 12）和美国（n = 1）等14个不同栽培地区的Koshihikari水稻进行了研究。所有水稻样品的C、N含量和同位素组成与一般植物材料一致，分别为37.2 ~ 40.0% （C含量）、0.8 ~ 1.4% （N含量）、-27.1 ~ -25.4% （δ C-13）、+0.4 ~ +9.0% （δ N-15）和+18.8 ~ +22.9% （δ O-18）。然而，根据元素和同位素组成的五角形雷达图可以清楚地区分出它的耕地。因此，比较C和N含量以及δ C-13、δ N-15和δ O-18值，可能有助于快速和常规地鉴别精米的地理来源。(C) 2008 Elsevier Ltd版权所有。
We determined carbon and nitrogen contents (C and N contents) and stable carbon, nitrogen, and oxygen isotopic compositions (delta C-13, delta N-15, and delta O-18) of polished rice in order to develop a simple method to discriminate its geographical origin. As a first attempt, we examined a single cultivar, Koshihikari rice, from 14 different cultivation areas including Australia (n = 1), Japan (n = 12), and USA (n = 1). For all rice samples, C and N contents and the isotopic compositions are consistent with those of general plant materials, being 37.2-40.0% (C content), 0.8-1.4% (N content), -27.1 to -25.4% (delta C-13), +0.4 to +9.0% (delta N-15), and +18.8 to +22.9% (delta O-18). However, its cultivated area is clearly distinguished by a pentagonal radar plot based on the elemental and isotopic compositions. Thus, the comparison of C and N contents and delta C-13, delta N-15, and delta O-18 values would potentially be useful for rapid and routine discrimination of geographical origin of the polished rice. (C) 2008 Elsevier Ltd. All rights reserved.