Low Parts per Billion Determination of Sulfide by Coulometric Argentometry

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• 作者：David T. Pierce ; Michelle S. Applebee ; Craig Lacher ; and Jerry Bessie
• 刊名：Environmental Science & Technology
• 出版年：1998
• 出版时间：June 1, 1998
• 年：1998
• 卷：32
• 期：11
• 页码：1734 - 1737
• 全文大小：56K
• 年卷期：v.32,no.11(June 1, 1998)
• ISSN：1520-5851

文摘

Present methods for the determination of sulfide inwastewater are hindered by poor detection limits andextensive sample pretreatment. A less problematicmethod has been developed with a method detection limitof 2.5 g L^-1. With this technique,sparged hydrogensulfide is precipitated in an acetate-supportingelectrolyteby electrogenerated silver ions. Analysis of base-preserved samples was performed with no pretreatmentother than volumetric dilution. Metals, halides, andnitrogen-base salts were studied as possible interferencesto the method. Direct comparisons with the standardmethylene blue method were made for both municipal andindustrial wastewaters. The present method was foundto be far less inhibited by sample turbidity.