ICP-MS测定陶瓷片密封水嘴浸泡液中镉含量的不确定度分析
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摘要
利用ICP-MS法测定陶瓷片密封水嘴浸泡液中镉含量,依据JJF 1059. 1—2012《测量不确定度评定与表示》的要求,建立数学模型,对其不确定度来源进行分析计算,计算合成标准不确定度与扩展不确定度。通过分析计算表明:当浸泡液中镉含量为7. 622μg/L、取置信概率为95%时,其相对不确定度为3. 2%;标准曲线的拟合对不确定的影响最大,标准浓液的配置对不确定度的影响最小。
Cadmium in immersion solution of ceramic cartridge faucets was measured by ICP-MS. Established the mathematical model,according to JJF 1059. 1—2012 " Evaluation and Expression of Uncertainty in Measurement". Analyzed and assessed the sources of uncertainty affecting factors,calculated the combined uncertainty and expanded uncertainty. The result showed that: when the Cadmium in immersion solution is 7. 622 μg/L and the confidence probability is 95%,the relative uncertainty is 3. 2%; the greatest affecting factor is the standard curve fitting and the least affecting factor is the preparing of standard solution.
Cadmium in immersion solution of ceramic cartridge faucets was measured by ICP-MS. Established the mathematical model,according to JJF 1059. 1—2012 " Evaluation and Expression of Uncertainty in Measurement". Analyzed and assessed the sources of uncertainty affecting factors,calculated the combined uncertainty and expanded uncertainty. The result showed that: when the Cadmium in immersion solution is 7. 622 μg/L and the confidence probability is 95%,the relative uncertainty is 3. 2%; the greatest affecting factor is the standard curve fitting and the least affecting factor is the preparing of standard solution.
引文
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[2]中华人民共和国国家质量监督检验检疫总局. GB18145—2014陶瓷片密封水嘴[S]. 2014.
[3]中华人民共和国国家质量监督检验检疫总局. JJF1059. 1—2012测量不确定度评定与表示[S]. 2012.
[4]中华人民共和国卫生部. GB/T 5750. 6-2006生活饮用水标准检验方法金属指标[S]. 2006.
[5]樊继鹏,汪洋,魏晓培,等. ICP-MS法测定饮用水中铅砷镉的不确定度评定的研究[J].包装与食品机械,2016,34(3):70-72.
[6]谢翠美,李鸿超,彭家杰. ICP-MS法测定水质中砷的不确定度评定[J].广东化工,2017,44(8):222-223.
[7]薛蕾,林婧,隋志伟,等.大肠杆菌定量检测用标准物质的研制[J].计量学报,2015,36(6):652-656.
[8]王钊,史乃捷,穆克然木·阿布利孜.化肥标准物质中钾含量准确值方法研究[J].计量学报,2018,39(3):425-430.
[9]陈金凤,刘中洁,吴德淮. ICP-OES法测定燃香类产品中Cr元素的不确定评定[J].化工进展,2016,35(2):116-120.
[10]姚雅萱,任玲玲,高思田,等.拉曼光谱仪相对强度标准物质量值表达及不确定度评定[J].计量学报,2017,38(3):376-379.