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Determination of 15N/14N and 13C/12C in Solid and Aqueous Cyanides

Analytical Chemistry

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Abstract

The stable isotopic compositions of nitrogen and carbon in cyanide compounds can be determined by combusting aliquots in sealed tubes to form N2 gas and CO2 gas and analyzing the gases by mass spectrometry. Free cyanide (CN-aq + HCNaq) in simple solutions can also be analyzed by first precipitating the cyanide as copper(II) ferrocyanide and then combusting the precipitate. Reproducibility is ??0.5??? or better for both ??15N and ??13C. If empirical corrections are made on the basis of carbon yields, the reproducibility of ??13C can be improved to ??0.2???. The analytical methods described herein are sufficiently accurate and precise to apply stable isotope techniques to problems of cyanide degradation in natural waters and industrial process solutions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Determination of 15N/14N and 13C/12C in Solid and Aqueous Cyanides
Series title:
Analytical Chemistry
Volume
68
Issue:
8
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Analytical Chemistry
First page:
1429
Last page:
1431
Number of Pages:
3