辽宁石油化工大学学报2012，Vol.32Issue(4)：8-12,5.DOI:10.3696/j.issn.1672-6952.2012.04.003
MPT-AES法测定牛奶中钙镁质量浓度的不确定度评定
Evaluation of Uncertainty in the Determination of Calcium and Magnesium in Milk by MPT-AES
蔚永清 1张金生 1李丽华 1赵文涛 1张小燕 1杨杰 1杨宏娟1
作者信息
- 1. 辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001
- 折叠
摘要
Abstract
The measurement uncertainty was estimated for the determination of calcium and magnesium in milk using microwave plasma torch atomic emission spectrometry (MPT - AES) and the uncertainty parameters were discussed and compared in detail. The results show that the "whole method" performance parameters, such as precision and recovery, and sampling are the three main contributors to uncertainty. In addition, the content of calibration solution is the main contributor to measurement uncertainty in the determination of magnesium. When coverage factor k=2 and confidence level approximately 95% , the expanded uncertainties were determined as 18. 6 and 3. 2 mg/L for Ca and Mg, respectively.关键词
微波等离子体原子发射光谱法/测量不确定度/牛奶/钙/镁Key words
Microwave plasma torch -atomic emission spectrometry/ Measurement uncertainty/ Milk/ Calcium/ Magnesium分类
能源科技引用本文复制引用
蔚永清,张金生,李丽华,赵文涛,张小燕,杨杰,杨宏娟..MPT-AES法测定牛奶中钙镁质量浓度的不确定度评定[J].辽宁石油化工大学学报,2012,32(4):8-12,5.
