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On‐line HfF 5 − /WF 5 − separation in an O 2 ‐filled radiofrequency quadrupole gas cell
Author(s) -
Zhao X.L.,
Eliades J.,
Litherland A. E.,
Kieser W. E.,
Cornett J.,
Charles C. R. J.
Publication year - 2013
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.6748
Subject(s) - isobar , chemistry , quadrupole , separator (oil production) , mass spectrometry , analytical chemistry (journal) , ion , accelerator mass spectrometry , quadrupole mass analyzer , nuclear physics , atomic physics , physics , chromatography , nucleon , organic chemistry , thermodynamics
RATIONALE An experimental Isobar Separator for Accelerator Mass Spectrometry (ISAMS) instrument has been used to demonstrate an on‐line separation of HfF 5 − from its isobar WF 5 − . This is necessary, in addition to sample preparation chemistry, for measuring 182 Hf at natural levels by Accelerator Mass Spectrometry (AMS). METHODS The device utilizes a radiofrequency quadrupole (RFQ) controlled gas cell, wherein anion‐gas reactions at eV energies attenuate the interfering isobars of the analyte molecular anions, leaving HfF 5 − for AMS analysis. The RFQ also helps to control the multiple scattering resulting from the ion‐gas collisions. RESULTS O 2 gas was used in the HfF 5 − /WF 5 − separation and WF 5 − was attenuated by nearly 3 orders of magnitude while maintaining ~75% transmission of HfF 5 − . It is expected that the transmission and attenuation can be increased by further research. CONCLUSIONS This result advances the possibility of detecting natural 182 Hf when AMS is supplemented with an isobar separator in the injection system. Copyright © 2013 John Wiley & Sons, Ltd.