宁夏富硒大米的矿物元素判别及品质评价

Mineral element discrimination of Selenium-enriched rice in Ningxia and its quality evaluation

目的:考察宁夏富硒大米与普通大米间的元素差异,并分析评价其理化品质。方法:以宁夏当地25份不同品牌大米样品为研究对象,采用电感耦合等离子体质谱仪(ICP-MS)测定两种大米样品的26种矿物元素,并对这些元素进行多元统计分析。结果:通过含量差异分析可对富硒大米品质进行判别,同时发现富硒大米富含Ca、Sn、K、Mg 4种元素。对其他品质指标进行分析,发现富硒大米不完善粒低、黄粒米低、垩白低,整精米率高、直链淀粉高、食味值高、新鲜度评分值高,硬度、弹性及胶着度适宜,适口性优良,外观品质和食用品质都较高。结论:宁夏富硒大米具有较高的营养价值和食味品质,可以通过元素含量差异判别富硒大米。

Objective:The element content and physical and chemical quality were analyzed from the nutritional quality of Selenium(Se)-enriched rice in Ningxia.Methods:25 rice samples from different brands in Ningxia were selected as the research object,and 26 mineral elements in which were determined by inductively coupled plasma mass spectrometry(ICP-MS),and multivariate statistical analysis of these elements was conducted.Results:Through the analysis of the difference of element content between Se-enriched rice and ordinary rice,the quality of Se-enriched rice was distinguished.Moreover,it was found that Se-enriched rice was rich in four kinds of elements such as Ca,Sn,K and Mg.Other quality indexes of Se-enriched rice were analyzed.It was found that Se-enriched rice was imperfect,with low grain,low yellow grain,low chalkiness,high head rice rate,high amylose,high taste value,high freshness score,suitable hardness,elasticity and adhesion,good palatability,and high appearance quality and edible quality.Conclusion:Se-enriched rice can be distinguished by the difference of element content,and the Se-enriched rice in Ningxia has high nutritional value and eating quality.