Instrument response functions, mass bias and matrix effects in isotope ratio measurements and semi-quantitative analysis by single and multi-collector ICP-MS

2003 ◽  
Vol 18 (3) ◽  
pp. 219-229 ◽  
Author(s):  
Christopher P. Ingle ◽  
Barry L. Sharp ◽  
Matthew S. A. Horstwood ◽  
Randall R. Parrish ◽  
D. John Lewis
Keyword(s):  
Quantitative Analysis ◽  
Isotope Ratio ◽  
Matrix Effects ◽  
Response Functions ◽  
Mass Bias ◽  
Icp Ms ◽  
Instrument Response ◽  
Isotope Ratio Measurements

scholarly journals Gd Matrix Effects on Eu Isotope Fractionation in Geological Rocks Using MC-ICP-MS: Optimizing Europium Isotope Ratio Measurements in Geological Samples

2021 ◽  
Author(s):  
Seung-Gu Lee ◽  
Tsuyoshi Tanaka
Keyword(s):  
Isotope Ratio ◽  
Isotope Fractionation ◽  
Matrix Effects ◽  
Internal Standard ◽  
Geological Samples ◽  
Chemical Reagent ◽  
True Value ◽  
Icp Ms ◽  
Silicate Rocks ◽  
Isotope Ratio Measurements

<p></p><p>Eu has only two isotopes (151Eu and 153 Eu). Eu and Gd are one of the rare earth elements that are very difficult to completely separate from each other. Eu isotope ratio can be determined by MC-ICP-MS using internal Sm or Gd spikes to correct for mass discrimination. NIST3117a ultrapure chemical reagent shows almost no Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement if a trace amount of Gd impurity remains in the purified Eu fraction. In this report, we tried to determine optimizing conditions for precise and accurate Europium isotope ratio measurements in geological samples using MC-ICP-MS. The pure Eu fraction with almost no Gd matrix separated from geological samples and NIST3117a ultrapure chemical reagent show almost same degree of Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement using if 154 Gd interference relative to 154 Sm as internal standard is more than ca. 0.1%. Particularly, highly fractionated granite and high silica volcanic rock with extremely low Eu concentration compared to Gd require high – purity Eu separation with a high recovery rate to obtain the true value of the Eu isotope fractionation in the geological rocks. <br></p><br><p></p>

Precise Mo isotope ratio measurements of low-Mo (ng g−1) geological samples using MC-ICP-MS

2016 ◽  
Vol 31 (6) ◽  
pp. 1287-1297 ◽  
Author(s):  
Jie Liu ◽  
Hanjie Wen ◽  
Yuxu Zhang ◽  
Haifeng Fan ◽  
Chuanwei Zhu
Keyword(s):  
Bias Correction ◽  
Isotope Ratio ◽  
Geological Samples ◽  
Mass Bias ◽  
Geological Processes ◽  
Icp Ms ◽  
Wide Range ◽  
Isotope Ratio Measurements

The double-spike (DS) mass bias correction approach was the method of choice for geological samples with <0.5 μg g−1 Mo; both the double-spike and the sample-standard bracketing (SSB) approaches could be applied for samples with >0.5 μg g−1 Mo. This method provided a wide range of applications for most Mo reservoirs in geological processes.

scholarly journals Gd Matrix Effects on Eu Isotope Fractionation in Geological Rocks Using MC-ICP-MS: Optimizing Europium Isotope Ratio Measurements in Geological Samples

2021 ◽  
Author(s):  
Seung-Gu Lee ◽  
Tsuyoshi Tanaka
Keyword(s):  
Isotope Ratio ◽  
Isotope Fractionation ◽  
Matrix Effects ◽  
Internal Standard ◽  
Geological Samples ◽  
Chemical Reagent ◽  
True Value ◽  
Icp Ms ◽  
Silicate Rocks ◽  
Isotope Ratio Measurements

<p></p><p>Eu has only two isotopes (151Eu and 153 Eu). Eu and Gd are one of the rare earth elements that are very difficult to completely separate from each other. Eu isotope ratio can be determined by MC-ICP-MS using internal Sm or Gd spikes to correct for mass discrimination. NIST3117a ultrapure chemical reagent shows almost no Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement if a trace amount of Gd impurity remains in the purified Eu fraction. In this report, we tried to determine optimizing conditions for precise and accurate Europium isotope ratio measurements in geological samples using MC-ICP-MS. The pure Eu fraction with almost no Gd matrix separated from geological samples and NIST3117a ultrapure chemical reagent show almost same degree of Eu isotope fractionation regardless of the kind of normalization isotope pair. However, Eu isotope ratio in the silicate rocks was effected by Gd matrix during MC-ICP-MS measurement using if 154 Gd interference relative to 154 Sm as internal standard is more than ca. 0.1%. Particularly, highly fractionated granite and high silica volcanic rock with extremely low Eu concentration compared to Gd require high – purity Eu separation with a high recovery rate to obtain the true value of the Eu isotope fractionation in the geological rocks. <br></p><br><p></p>

Use of Zr for mass bias correction in strontium isotope ratio determinations using MC-ICP-MS

2008 ◽  
Vol 23 (9) ◽  
pp. 1269 ◽  
Author(s):  
Lu Yang ◽  
Charlotte Peter ◽  
Ulrich Panne ◽  
Ralph E. Sturgeon
Keyword(s):  
Bias Correction ◽  
Isotope Ratio ◽  
Strontium Isotope ◽  
Mass Bias ◽  
Strontium Isotope Ratio ◽  
Icp Ms

scholarly journals Copper Isotope Ratio Measurements of Cu-Dominated Minerals Without Column Chromatography Using MC-ICP-MS

2020 ◽  
Vol 8 ◽  
Author(s):  
Yan Zhang ◽  
Zhian Bao ◽  
Nan Lv ◽  
Kaiyun Chen ◽  
Chunlei Zong ◽  
...  
Keyword(s):  
Column Chromatography ◽  
Isotope Ratio ◽  
Copper Isotope ◽  
Icp Ms ◽  
Isotope Ratio Measurements
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