Evaluation Of The Proficiency Testing Results Using River Water-Based Reference Materials For Heavy Metal Analysis
ANALYTICAL SCIENCE AND TECHNOLOGY(2010)
Abstract
In this study, river water-based reference materials (RMs), NIER-I08RW and NIER-I09, for trace metal analysis were prepared and certified for Pb, Cd, Cr and Cu with evaluation of uncertainties. The RMs were confirmed to be homogeneous enough to be used as proficiency testing materials since within-bottle homogenieties of the RMs were lower than 0.3 times of targeted standard deviation of proficiency testing. The RMs were distributed to environmental testing laboratories for the proficiency testing and the variation of Z scores of the proficiency testing results were compared for different assigned values. The relative bias, B relative, deviations between reference values and consensus values, were lower than +/- 1 except for cadmium of NIER-I08RW. The results showed both values were in a good agreement and only 2.9% of Z scores changed by using a different assigned values such as consensus and reference values.
MoreTranslated text
Key words
river water-based reference material, proficiency testing, environmental testing, heavy metal
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined