Suppression of Matrix Effects in ICP‐MS by High Power Operation of ICP: Application to Precise Determination of Rb, Sr, Y, Cs, Ba, REE, Pb, Th and U at ng g<sup>‐1</sup> Levels in Milligram Silicate Samples
書誌事項
- 公開日
- 1997-12
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1111/j.1751-908x.1997.tb00678.x
- 公開者
- Wiley
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説明
<jats:p>We found that the suppression of signals for <jats:sup>88</jats:sup>Sr, <jats:sup>140</jats:sup>Ce and <jats:sup>238</jats:sup>U in rock solution caused by rock matrix in ICP‐MS (matrix effects) was reduced at high power operation (1.7 kW) of the ICP. To make the signal suppression by the matrix negligible, minimum dilution factors (DF) of the rock solution for Sr, Ce and U were 600, 400 and 113 at 1.1, 1.4 and 1.7 kW, respectively. Based on these findings, a rapid and precise determination method for Rb, Sr, Y, Cs, Ba, REE, Pb, Th and U using FI (flow injection)‐ICP‐MS was developed. The amount of the sample solution required for FI‐ICP‐MS was 0.2 ml, so that 1.8 mg sample was sufficient for analysis with a detection limit of several ng g<jats:sup>‐1</jats:sup>. Using this method, we determined the trace element concentrations in the USGS rock reference materials, DTS‐1, PCC‐1, BCR‐1 and AGV‐1, and the GSJ rock reference materials, JP‐1, JB‐1, ‐2, ‐3, JA‐1, ‐2 and ‐3. The reproducibilities (RSD %) in replicate analyses (n=5) of BCR‐1, AGV‐1, JB‐1, ‐2, ‐3, JA‐1, ‐2, and ‐3 were < 6 %, and typically 2.5%. The difference between the average concentrations of this study for BCR‐1 and those of the reference values were < 2%. Therefore, it was concluded that the method can give reliable data for trace elements in silicate rocks.</jats:p>
収録刊行物
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- Geostandards Newsletter
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Geostandards Newsletter 21 (2), 307-319, 1997-12
Wiley
