LOW PARTS-PER-BILLION DETERMINATION OF SULFIDE BY COULOMETRIC ARGENTOMETRY

Citation
Dt. Pierce et al., LOW PARTS-PER-BILLION DETERMINATION OF SULFIDE BY COULOMETRIC ARGENTOMETRY, Environmental science & technology, 32(11), 1998, pp. 1734-1737
Citations number
14
Categorie Soggetti
Environmental Sciences","Engineering, Environmental
ISSN journal
0013936X
Volume
32
Issue
11
Year of publication
1998
Pages
1734 - 1737
Database
ISI
SICI code
0013-936X(1998)32:11<1734:LPDOSB>2.0.ZU;2-1
Abstract
Present methods for the determination of sulfide in wastewater are hin dered by poor detection limits and extensive sample pretreatment A les s problematic method has been developed with a method detection limit of 2.5 mu g L-1. With this technique, sparged hydrogen sulfide is prec ipitated in an acetate-supporting electrolyte by electrogenerated silv er ions. Analysis of base-preserved samples was performed with no pret reatment other than volumetric dilution. Metals, halides, and nitrogen -base salts were studied as possible interferences to the method. Dire ct comparisons with the standard methylene blue method were made for b oth municipal and industrial wastewaters. The present method was found to be far less inhibited by sample turbidity.