Elimination of Dissolved Sulfide Interference in the Flow-Injection Determination of Sigma-CO2 by Addition of Molybdate

Authors

Rigel L. Lustwerk, Old Dominion University
David J. Burdige, Old Dominion UniversityFollow

Document Type

Article

Publication Date

1995

DOI

10.4319/lo.1995.40.5.1011

Publication Title

Limnology and Oceanography

Volume

40

Issue

5

Pages

1011-1012

Abstract

A previously described flow injection method for the analysis of ΣCO₂ included the addition of ZnCl₂ to some samples before analysis in order to precipitate dissolved sulfide (which interferes with the method) as ZnS. However, the use of Zn²⁺ in samples with high concentrations of dissolved sulfide causes the coprecipitation of ZnCO₃, and in our experience with this technique, ZnCO₃ also precipitates even in the absence of dissolved sulfide. The addition of molybdate effectively complexes dissolved sulfide without interfering with the determination of ΣCO2 by this technique.

Original Publication Citation

Lustwerk, R.L., & Burdige, D.J. (1995). Elimination of dissolved sulfide interference in the flow-injection determination of ΣCO₂ by addition of molybdate. Limnology and Oceanography, 40(5), 1011-1012. doi: 10.4319/lo.1995.40.5.1011

Repository Citation

Lustwerk, Rigel L. and Burdige, David J., "Elimination of Dissolved Sulfide Interference in the Flow-Injection Determination of Sigma-CO2 by Addition of Molybdate" (1995). OES Faculty Publications. 79.
https://digitalcommons.odu.edu/oeas_fac_pubs/79