Citation: WU Shi-Tou, HUANG Chao, XIE Lie-Wen, YANG Yue-Heng, YANG Jin-Hui. Iolite Based Bulk Normalization as 100% m/m Quantification Strategy for Reduction of Laser Ablation-Inductively Coupled Plasma Mass Spectrometry Transient Signal[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(10): 1628-1636. doi: 10.11895/j.issn.0253-3820.181291 shu

Iolite Based Bulk Normalization as 100% m/m Quantification Strategy for Reduction of Laser Ablation-Inductively Coupled Plasma Mass Spectrometry Transient Signal

WU Shi-Tou ^1,2,3, ,
HUANG Chao ^1,2 ,
XIE Lie-Wen ^1,2 ,
YANG Yue-Heng ^1,2 ,
YANG Jin-Hui ^1,2

1.
State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2.
Institute of Earth Science, Chineses Academy of Sciences, Beijing 100029, China;
3.
Faculty of Geology and Geophysics, Göttingen University, Göttingen 37077, Germany

Received Date: 3 May 2018
Revised Date: 25 July 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 41525012) and the China Scholarship Council (No. 201306410007)

As the advantages of powerful data-handling capacity, excellent signal visualization and open source of calculation codes, Iolite package draw more attention in laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) community in recent years. In this study, the application of Iolite package was investigated for LA-ICP-MS elemental quantification, and a quantification code for bulk normalized as 100% (m/m) strategy was compiled. We found that the spline interpolation was better than linear interpolation for the correction of time-dependent instrument drift. BCR-2G as monitor material was used to evaluate the proposed code and the results revealed that the code was practical and reliable. The analytical results are affected by the used calibration materials. TiO₂, MgO, K₂O and rare earth elements in BCR-2G were slightly off (5%-10%) when NIST SRM 610 as the calibrator, while Cr and Mo were higher (10%-30%) than the recommended values when StHs6/80-G as the calibrator. Those phenomenon were attributed to the matrix effect or the inaccurate values of corresponding calibrators. Three main sources for the LA-ICP-MS combined uncertainty were recognized, which included the uncertainty of recommended values of analytes in calibration material, the uncertainty of measured intensity ratios in samples and the error in bulk normalized as 100% (m/m) strategy. 50 elements in CGSG glass reference materials were quantified based on the proposed Iolite code. Major elements (except MnO, CaO and P₂O₅) matched with the preliminary values in 5% and trace elements (except Cr, Ni, Zn, Ga, Mo and Sb) were agreement with the preliminary values in 10%. The dataset reported in this study was useful for the certification of CGSG reference materials. Overall, the proposed Iolite code broadened the application of Iolite package in the reduction of LA-ICP-MS transient signal.
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