Spectrophotometric determination of osmium with 2-mercaptobenzothiazole

  title={Spectrophotometric determination of osmium with 2-mercaptobenzothiazole},
  author={B. Bera and M. M. Chakrabartty},
  journal={Microchemical Journal},
Abstract A new spectrophotometric method for osmium is described which is based on the extraction of the blue precipitate formed by the reaction with 2-Mercaptobenzothiazole at pH ~ 4, and measurement of absorbance at 590–600 mμ. The color system obeys Beer's law from 2 to 10 μg/ml of osmium, the optimum range being from 5 to 8 μg/ml. The sensitivity of the color reaction and the molor absorptivity of the cationic diligand complex are 0.019 μg/cm2 and 1 × 104, respectively. Small amounts of… Expand
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