Sanke Gowda, H. and Thimmaiah, K. N. (1978) Spectrophotometric determination of cerium(IV), arsenic(III), and nitrite with promazine hydrochloride. Microchemical journal, 23 (3). pp. 291-296. ISSN 0026-265X
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Promazine hydrochloride is proposed as a new reagent for the spectrophotometric determination of cerium(IV), arsenic(III), and nitrite. The reagent forms a red-colored radical with cerium(IV) instantaneously in 0.5-2 M sulfuric acid or 0.5-2.5 M phosphoric acid solution. The red radical exhibits maximum absorbance at 505 nm. An 11-fold molar excess of the reagent is necessary for the full development of the color intensity. Beer's law is valid over the concentration range 0.5-15 ppm in sulfuric acid and 0.5-21 ppm in phosphoric acid. The sensitivities of the reaction in sulfuric and phosphoric acid media are 0.022 and 0.019 μg/cm2, respectively. The effects of acidity, time, order of addition of reagents, temperature, reagent concentration, and diverse ions are reported. The proposed method offers the advantages of good sensitivity, simplicity, rapidity, selectivity, and a wider range of determination without the need for extraction. Arsenic(III) and nitrite are indirectly determined.
| Item Type: | Article |
|---|---|
| Subjects: | C Chemical Science > Chemistry |
| Divisions: | Department of > Chemistry |
| Depositing User: | Dhruva Kumar |
| Date Deposited: | 27 May 2021 05:35 |
| Last Modified: | 04 Jul 2022 07:43 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/13957 |
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