2-(2-thiazolylazo)-4-methyl-5-(sulfomethylamino)benzoic acid as a reagent for the spectrophotometric determination of cobalt

Add time:08/03/2019    Source:sciencedirect.com

SummarySome 2-(2-thiazolylazo)-5-(sulfomethylamino)benzoic acid derivatives are synthesized. Among them, 2-(2-thiazolylazo)-4-methyl-5-(sulfomethylamino)benzoic acid (TAMSMB) is very sensitive (ε = 1.13 × 105 l mol-1 cm-1 at λmax 655 nm) and selective for the spectrophotometric determination of cobalt. The interference of copper and nickel can be eliminated by addition of EDTA after the cobalt(III)—TAMSMB complex has been formed. Cobalt is determined in nickel salts and glass.

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