Certification of the rubidium concentration in water materials for the international measurement evaluation programme (IMEP) using isotope dilution inductively coupled plasma mass spectrometry

被引:14
作者
Ornemark, U
Taylor, PDP
DeBievre, P
机构
关键词
rubidium; isotope dilution; inductively coupled plasma mass spectrometry; traceability; water;
D O I
10.1039/a607674b
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This paper describes the certification of rubidium in synthetic and natural water samples for Round 6 of the Institute for Reference Materials and Measurements International Measurement Evaluation Programme (IMEP). The analytical procedure is based on isotope dilution ICP-MS as the primary method of measurement. Ion exchange chromatography was used to eliminate the isobaric interference on Rb-87 from Sr-87. By using the adopted procedure, SI-traceable values with expanded uncertainties (U = 2u(c)) of less than or equal to 2% were obtained for rubidium at nmol kg(-1) (low mu g kg(-1)) levels. Results from 42 field laboratories participating in IMEP-6 are evaluated against the certified values.
引用
收藏
页码:567 / 572
页数:6
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