The Use of D2 Collision Gas in Isotope Dilution for the Analysis of Se with Octopole Reaction Cell Inductively Coupled Plasma‐Mass Spectrometry

Bulletin of the Korean Chemical Society

Lee‐¹  Won Kim¹ 

[1] Department of Chemistry Education Korea National University of Education Chung Buk 28173 Korea

关键词: Se;    Isotope Dilution Method;    Octopole Reaction Cell Inductively Coupled Plasma‐;    Mass Spectrometry;    Collision/Reaction Gas;    Deuterium;   

DOI  :  10.1002/bkcs.11312

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

D2 was used as a collision/reaction cell gas in Ar inductively coupled plasma‐mass spectrometry for the analysis of selenium with an isotope dilution method. In conventional H2 collision gas, 80[BrH] was generated by the reaction of collision gas with Br in matrix. The use of D2 could generate 81[BrD] instead of 80[BrH], making it possible for the use of m/z 80, which has the highest abundance among Se isotopes. Two collision gases, H2 and D2, were compared with each other for the isotope spikes of 76Se, 77Se, and 78Se. For an inorganic selenium standard, both gases showed good results of 99% accuracy and below 1% Relative Standard Deviation (RSD). However, for complex‐matrix samples, the results were different. For NIST SRM 1567b (wheat flour), which had a relatively simple matrix, accuracy and precision were similar for both gases. For KRISS CRM 108‐04‐001(oyster) and NIST SRM 2976 (mussel), which had a relatively high level of Br matrix, deuterium gas showed better accuracy and precision. For H2, 77Se showed the highest accuracy (98.4% recovery) but low precision (3.24% RSD). For deuterium, all three spikes showed good results, 98% average recovery and less than 1% RSD. The use of D2 collision gas demonstrates that it is effective for the accurate determination of Se, even for a complex matrix.

【 授权许可】

Unknown