专论与研究

能量色散X射线荧光光谱法测定大米中镉元素的不确定度评定

展开
  • 江苏天瑞仪器股份有限公司,江苏 昆山 215300

网络出版日期: 2018-03-20

Evaluation of Uncertainty in the Determination of Cadmium in Rice by Energy Dispersive X-ray Fluorescence Spectrometry

Expand

Online published: 2018-03-20

摘要

分析了能量色散X荧光光谱法测定大米中镉含量不确定度的各分量,分析了测量不确定度的来源。测量不确定度主要来源于标准物质和工作曲线拟合。对不确定度分量进行评定,经计算得出合成标准不确定度和扩展不确定度。当大米中镉元素的含量为0.268 mg/kg 时,扩展不确定度为0.029 mg/kg(k=2)。

本文引用格式

李强,欧飞,吴敏,黄万燕 . 能量色散X射线荧光光谱法测定大米中镉元素的不确定度评定[J]. 中国稻米, 2018 , 24(2) : 64 -66 . DOI: 10.3969/j.issn.1006-8082.2018.02.015

Abstract

The sources affecting uncertainty in determination of cadmium in rice by energy dispersive X-ray fluorescence spectrometry were analyzed and evaluated. The measurement uncertainty is mainly derived from the standard material and the work curve regression. The uncertainty components were evaluated and the combined standard uncertainty and expanded uncertainty were calculated. The expanded uncertainty was 0.029 mg/kg(k=2) when the cadmium content in rice sample was 0.268 mg/kg.

参考文献

[1] 崔玉静,黄益宗. 镉对人类健康的危害及其影响因子的研究进展[J]. 卫生研究,2006,35(5):656-658. [2] Simmons R W, Pongsakul P, Saiyasitpanich D, et al. Elevated levels of cadmium and zinc in paddy soils and elevated levels of cadmium in rice grain downstream of a zinc mineralized area in Thailand: Implications for public health[J]. Environ Geochem Health, 2005, 27(5): 501-511. [3] Gawalko E J, Nowicki T W, Babb J, et al. Comparison of closed-vessel and focused open-vessel microwave dissolution for determination of cadmium, copper, lead, and selenium in wheat, wheat products, corn bran, and rice flour by transverse heated graphite furnace atomic absorption spectrometry[J]. J AOAC Int, 1997, 80(2): 379-387. [4] 邵劲松,高芹. 微波消解石墨炉原子吸收法测定大米中铅镉[J]. 粮食与食品工业,2005,12(2):42-44. [5] 李刚,刘玉华. 新化学蒸气发生体系原子荧光光谱法测定粮食样品中痕量镉[J]. 岩矿测试,2006,25(1):27-31. [6] Wen X D, Wu P, Chen L, et al. Determination of cadmium in rice and water by tungsten coil electrothermal vaporization-atomic fluorescence spectrometry and tungsten coil electrothermal atomic absorption spectrometry after cloud point extraction[J]. Analytica Chimica Acta, 2009, 650(1): 33-38. [6] 王春霖,张平,齐剑英,等. 微波消解-ICP-MS测定水稻中的微量重金属元素[J]. 化学与化工,2008,11(2):11-14. [7] 王啊娟,付湘晋,赵喜玲,等. 电感耦合等离子体质谱法(ICP-MS)研究发芽对糙米重金属元素(镉、铅、砷)含量影响[J]. 粮食与油脂,2013,26(3):21-23. [8] 张辉,余正东,吴敏,等. ED-XRF法快速测定大米中镉元素的实用性分析[J]. 食品工业,2015,36(12):259-262. [9] LS/T 6115-2016. 粮油检测 稻谷中镉含量快速测定 X射线荧光光谱法[S]. [10] 国家质量技术监督局计量司. 测量不确定度评定与表示指南[M]. 北京:中国计量出版社,2003. [11] JJF1059-1999. 测量不确定度评定与表示[S]. [12] 吉昂,卓尚军,李国会. 能量色散X荧光光谱仪[M]. 北京:科学出版社,2001.
文章导航

/

浙ICP备05004719号-16
公安备案号:33010302003356
版权所有 © 《中国稻米》编辑部
地址:浙江省杭州市富阳区水稻所路28号 邮编:311400 电话:0571-63370271, 63370368 E-mail:zgdm@163.com
本系统由北京玛格泰克科技发展有限公司设计开发