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The Use of D 2 Collision Gas in Isotope Dilution for the Analysis of Se with Octopole Reaction Cell Inductively Coupled Plasma‐Mass Spectrometry
Author(s) -
Kim LeeWon,
Pak YongNam
Publication year - 2017
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11312
Subject(s) - isotope dilution , chemistry , deuterium , inductively coupled plasma mass spectrometry , matrix (chemical analysis) , analytical chemistry (journal) , isotope , mass spectrometry , dilution , inductively coupled plasma , nist , radiochemistry , chromatography , plasma , atomic physics , physics , nuclear physics , natural language processing , computer science , thermodynamics
D 2 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 H 2 collision gas, 80 [BrH] was generated by the reaction of collision gas with Br in matrix. The use of D 2 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, H 2 and D 2 , were compared with each other for the isotope spikes of 76 Se, 77 Se, and 78 Se. 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 H 2 , 77 Se 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 D 2 collision gas demonstrates that it is effective for the accurate determination of Se, even for a complex matrix.