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http://dx.doi.org/10.5012/bkcs.2003.24.9.1261

Kinetic Spectrophotometric Determination of Trace Amounts of Sulfide  

Barzegar, Mohsen (Department of Food Science and Technology, Tarbiat Modarres University)
Jabbari, Ali (Department of Chemistry, K. N. Toosi University)
Esmaeili, Majid (Department of Chemistry, Razi University)
Publication Information
Bulletin of the Korean Chemical Society / v.24, no.9, 2003 , pp. 1261-1264 More about this Journal
Abstract
A method for the determination of trace amount of sulfide based on the addition reaction of sulfide with methyl green at pH 7.5 and $25{\circ}C$ is described. The reaction is monitored spectrophotometrically by measuring the decrease in absorbance of the dyestuff at 637 nm by the initial rate and fixed time method. The calibration graph is linear in the range 30-1200 ppb. The theoretical limit of detection was 0.014 ppm. Seven replicate analysis of a sample solution containing 0.70 ppm sulfide gave a relative standard deviation of 1.5%. The interfering effects of various ions on sulfide determination have been reported and procedures for removal of interference have been described. The proposed method was applied successfully to the determination of sulfide in tap and wastewater samples.
Keywords
Sulfide; Kinetic spectrophotometric; Methyl green; Slope method; Fixed time method;
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