Keshavan, B. and Nagaraja, P. (1985) A rapid method for the spectrophotometric determination of palladium(II) and osmium(VIII). Microchemical journal, 31 (1). pp. 124-129. ISSN 0026-265X
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Propionyl promazine phosphate is proposed as a new reagent for the rapid spectrophotometric determination of microgram amounts of Pd(II) and Os(VII). PPP instantaneously forms an orange-red 1:1 complex with Pd(II) in sodium acetate-hydrochloric acid buffer of pH 0.8 to 4.0 at room temperature. The reagent also forms an orange-red radical cation with Os(VIII) in 0.5 to 2.0 M hydrochloric acid. The Pd-PPP complex exhibits an absorption maximum at 490-500 nm with molar absorptivity of 7.1 � 103 liter mol-1 cm-1. The Os-PPP radical cation has an absorption maximum at 505-515 nm with molar absorptivity of 2.21 � 104 liters mol-1 cm-1. The Sandell sensitivity is 0.022 μg/cm2 (Pd) and 0.008 μg/ cm2 (Os). Beer's law is valid over the concentration range 0.2 to 21 ppm (Pd) and 0.2 to 4.2 ppm (Os). The proposed method offers the advantages of simplicity, rapidity, and without the need for heating or extraction. The reagent is used for the determination of Pd in the synthetic mixtures corresponding to Pd alloys used in jewelery and Os in osmiridium alloy.
| Item Type: | Article |
|---|---|
| Subjects: | C Chemical Science > Chemistry |
| Divisions: | Department of > Chemistry |
| Depositing User: | Dhruva Kumar |
| Date Deposited: | 20 May 2021 10:04 |
| Last Modified: | 20 May 2021 10:04 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/13661 |
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