大米中矿质元素含量测定及分析

王广西; 胡燕; 罗琼; 蔡荣智; 李丹; 陈诚; 翟娟

doi:10.11889/j.0253-3219.2017.hjs.40.080501

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大米中矿质元素含量测定及分析

核物理、交叉学科研究 | 更新时间：2021-05-19

- 大米中矿质元素含量测定及分析
- Determination and analysis of mineral elements content in rice samples
- 核技术 2017年40卷第8期文章编号：080501
- 作者机构：
  
  成都理工大学核技术与自动化工程学院成都 610059
- 作者简介：
  
  [ "王广西, 男, 1979年出生, 2012年于成都理工大学获博士学位, 副教授, 从事核技术应用研究", "WANG Guangxi, male, born in 1979, graduated from Chengdu University of Technology with a doctoral degree in 2012, associate professor, focusing on nuclear technology and application" ]
- 基金信息：
  
  国家自然科学基金(41574128);四川省科技计划项目(2016JY0208);四川省教育厅自然科学重点项目(15ZA0070);四川省教育厅自然科学项目(15ZB0075)
- DOI：10.11889/j.0253-3219.2017.hjs.40.080501
  中图分类号： TL99
- 收稿日期：2017-03-09，
  
  修回日期：2017-04-07，
  
  纸质出版日期：2017-08-10
- 稿件说明：
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王广西, 胡燕, 罗琼, 等. 大米中矿质元素含量测定及分析[J]. 核技术, 2017,40(8):080501

Guangxi WANG, Yan HU, Qiong LUO, et al. Determination and analysis of mineral elements content in rice samples[J]. Nuclear techniques, 2017, 40(8): 080501
王广西, 胡燕, 罗琼, 等. 大米中矿质元素含量测定及分析[J]. 核技术, 2017,40(8):080501 DOI： 10.11889/j.0253-3219.2017.hjs.40.080501.

Guangxi WANG, Yan HU, Qiong LUO, et al. Determination and analysis of mineral elements content in rice samples[J]. Nuclear techniques, 2017, 40(8): 080501 DOI： 10.11889/j.0253-3219.2017.hjs.40.080501.

摘要

采用粉末压片制样，用波长色散X射线荧光光谱法对湖北、四川和黑龙江产地大米中Mn、Fe、Cu、Zn、Mg、P、S、K、Ca 9种元素含量进行测定，并用主成分和聚类分析对结果进行分析。讨论了各目标元素测量条件，运用经验系数法和散射射线作内标对基体效应进行校正，通过测量国家生物标准物质建立了工作曲线。分析结果表明，该方法检出限较低、精密度较好、准确度较高，不同产地大米样品中目标元素含量差异显著。前4个主成分的累计方差贡献率为89.3%，30份大米样品分布在三个区域，分别来自三个产地。聚类分析在阈值为9时，将大米样品分成三类，与主成分分析结果一致。因此矿质元素可作为大米产地溯源的指标。

Abstract

Background

Mineral elements play an important role in the human body and mainly derive from food. The rice is staple food of most people in our country. Therefore

it is important to determine accurately the content of mineral elements in rice.

Purpose

This study aims to establish an accurate analysis method for the rice measurement and distinguish the rice from different places.

Methods

Wavelength dispersive X-ray fluorescence (WDXRF) spectrometry was applied to the measurement of Mn

Ca 9 elements in rice (produced in Hubei

Sichuan and Heilongjiang) with pressed powder pellets. Principal component and cluster analysis analyzed determination results. The measuring conditions of target elements were investigated. The matrix effect was corrected by empirical coefficient method and scattered radiation as internal standard and working curve was established with national biological standard reference materials.

Results

The detection limit of this method was low

and its precision and accuracy were high. There were diverse contents of target elements from different places. Four principal components could account for 89.3% of total variance. 30 samples could be divided to three regions which came from three different places. Cluster analysis showed the samples could be clustered into three groups at the threshold of 9 levels. The results were consistent with the result of principal component analysis.

Conclusion

This method can accurately determine the content of mineral elements in rice and the mineral elements can be used as a traceability of producing area.

关键词

Keywords

references

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