Citation: WU Shi-Tou, WANG Ya-Ping, XU Chun-Xue. Laser Ablation-Inductively Coupled Plasma-Mass Spectrometer: A Quantification Strategy Based on Two Reference Materials and Bulk Normalization as 100% (wt)[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(7): 965-972. doi: 10.11895/j.issn.0253-3820.170081 shu

Laser Ablation-Inductively Coupled Plasma-Mass Spectrometer: A Quantification Strategy Based on Two Reference Materials and Bulk Normalization as 100% (wt)

1.
Geowissenschaftliches Zentrum, Göttingen Universität, Göttingen 37077, Germany;
2.
National Research Center of Geoanalysis, Beijing 100037, China

Received Date: 11 February 2017
Revised Date: 12 May 2017

Quantitative calibration strategy as an essential issue in laser ablation ICP-MS plays an important role for the guarantee of analytical accuracy. In this study, uncertainties of reference values in current available glass certified reference materials (NIST, MPI-DING and USGS) as well as the matrix effect among them were systematically evaluated. The results illustrated that NIST610 was better than other reference materials from aspect of reference value uncertainty. The matrix effect among NIST, MPI-DING and USGS reference materials was insignificant under our experimental conditions. A quantification strategy based on two reference materials (NIST610 and StHs6/80-G) and normalization to 100% (w/w) was proposed to avoid the insufficiency of single reference material strategy, which suffered the very low content and large uncertainty for some elements. The comparision of ML3B-G results obtained from three quantification strategies (single reference material NIST610, single reference material StHs6/80-G and two refterence materials) illustrated that the proposed strategy improved the analytical accuracy. Three reference materials (BCR-2G, CGSG-2 and KL-2G) were quantified with the proposed strategy, and almost all data matched well with reference value, meanwhile the data reported here could supplement the reference value database.
- Laser ablation inductively coupled plasma-mass spectrometer,
- Quantification strategy,
- Reference value uncertainty,
- Matrix effect,
- Micro-analysis
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1.
沈阳化工大学材料科学与工程学院沈阳 110142