Relative Measurements of Lithium Isotope Ratio by Surface Ionization Ion Source II. Lithium Carbonate and Lithium Nitrate Prepared from Laboratory Standard Lithium Sulfate(Merck)

SETSUO TANIGUCHI; OSAMU TOYAMA; TERUO HAYAKAWA

doi:10.5702/massspec1953.10.100

SETSUO TANIGUCHI, OSAMU TOYAMA, TERUO HAYAKAWA

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JOURNAL FREE ACCESS

1962 Volume 10 Issue 21 Pages 100-107

DOI https://doi.org/10.5702/massspec1953.10.100

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Published: October 25, 1962 Received: July 20, 1962 Available on J-STAGE: June 28, 2010 Accepted: - Advance online publication: - Revised: -
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Date of correction: June 28, 2010 Reason for correction: - Correction: ABSTRACT Details: Wrong : Relative measurements of the lithium isotope ratio for lithium carbonate and lithium nitrate prepared from laboratory standard lithium sulfate(Merck)have been made by using a surface ionization ion source of the triple filament type. For lithium carbonate, the isotope ratios by the measured point method varied systematically with time and the measurable isotope fractionation was observed. The isotope fractionation was discussed from the viewpoint of the isotope effect in the evaporation of lithium oxide which might be formed at the sample filament surface from lithium carbonate. The isotope ratio(7Li/6Li)for this sample moterial by the ion current integration method was measured to be12.38±0.01. For lithium nitrate, the isotope ratio of 12.38±0.03obtained by the measured point method well agrees with the isotope ratio12.39±0.01measured by the ion current integration method. In the course of sample preparation from laboratory standard lithium sulfate, the measurable isotope fractionation did not take place.
Right : Relative measurements of the lithium isotope ratio for lithium carbonate and lithium nitrate prepared from laboratory standard lithium sulfate (Merck) have been made by using a surface ionization ion source of the triple filament type. For lithium carbonate, the isotope ratios by the measured point method varied systematically with time and the measurable isotope fractionation was observed. The isotope fractionation was discussed from the viewpoint of the isotope effect in the evaporation of lithium oxide which might be formed at the sample filament surface from lithium carbonate. The isotope ratio(⁷Li/⁶Li)for this sample moterial by the ion current integration method was measured to be 12.38 ±0.01. For lithium nitrate, the isotope ratio of 12.38 ±0.03 obtained by the measured point method well agrees with the isotope ratio 12.39 ±0.01 measured by the ion current integration method. In the course of sample preparation from laboratory standard lithium sulfate, the measurable isotope fractionation did not take place.

Date of correction: June 28, 2010 Reason for correction: - Correction: AFFILIATION Details: Wrong :
1) Department of Chemistry, College of General Education and Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture, Mozu-umomachi, Sakai

Right :
1) Department of Chemistry, College of General Education and Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture

Date of correction: June 28, 2010 Reason for correction: - Correction: CITATION Details: Wrong : E
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Right : S. Taniguchi, O. Toyama and T. Hayakawa, Mass Spectroscopy, 10, 91(1962).
A. E. Cameron, J. A. C. S. 77, 2731(1955).
G. H. Palmer, “Advance in Mass Spectrometry(Ed.,J.D.Waldron)”, Pergamon Press, London (1959) ,pp 89.
A. A. Smales and R. K. Webster, Analytica Chimica Acta, 18,587(1958).

Abstract

Relative measurements of the lithium isotope ratio for lithium carbonate and lithium nitrate prepared from laboratory standard lithium sulfate (Merck) have been made by using a surface ionization ion source of the triple filament type. For lithium carbonate, the isotope ratios by the measured point method varied systematically with time and the measurable isotope fractionation was observed. The isotope fractionation was discussed from the viewpoint of the isotope effect in the evaporation of lithium oxide which might be formed at the sample filament surface from lithium carbonate. The isotope ratio(⁷Li/⁶Li)for this sample moterial by the ion current integration method was measured to be 12.38 ±0.01. For lithium nitrate, the isotope ratio of 12.38 ±0.03 obtained by the measured point method well agrees with the isotope ratio 12.39 ±0.01 measured by the ion current integration method. In the course of sample preparation from laboratory standard lithium sulfate, the measurable isotope fractionation did not take place.

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