Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559474 | Talanta | 2011 | 7 Pages |
Abstract
Analytical methods have been developed to determine sulfur species concentrations in natural geothermal waters using Reagent-Free⢠Ion Chromatography (RFâ¢-IC), titrations and spectrophotometry. The sulfur species include SO42â, S2O32â, and âS2â with additional determination of SO32â and SxO62â that remains somewhat semiquantitative. The observed workable limits of detections were â¤0.5 μM depending on sample matrix and the analytical detection limits were 0.1 μM. Due to changes in sulfur species concentrations upon storage, on-site analyses of natural water samples were preferred. Alternatively, the samples may be stabilized on resin for later elution and analysis in the laboratory. The analytical method further allowed simultaneous determination of other anions including Fâ, Clâ, dissolved inorganic carbon (DIC) and NO3â without sample preservation or stabilization. The power of the newly developed methods relies in routine analysis of sulfur speciation of importance in natural waters using techniques and facilities available in most laboratories doing water sample analysis. The new methods were successfully applied for the determination of sulfur species concentrations in samples of natural and synthetic waters.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Hanna Kaasalainen, Andri Stefánsson,