Spectrophotometric determination of gold(III) in forensic and pharmaceutical samples and results complemented with ICP AES and EDXRF analysis

Vani, N. and Kiran Kumar, M. and Nagendrappa, G. (2017) Spectrophotometric determination of gold(III) in forensic and pharmaceutical samples and results complemented with ICP AES and EDXRF analysis. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 173. 407 - 417. ISSN 1873-3557

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Official URL: https://doi.org/10.1016/j.saa.2016.09.045

Abstract

Spectrophotometric method with three systems were developed here for the determination of gold(III) using o-dianisidine, aniline sulphate and catechol. Gold(III),in the system 1 it oxidizes o-dianisidine, in the system 2 it oxidizes catechol followed by its coupling with o-dianisidine, in the system 3 it oxidizes catechol followed by its coupling with aniline sulphate forming dye products with respective λmax 446nm, 540nm, and 505nm. All the three systems were optimized and analytical parameters were calculated. The molar absorptivity values were 9.27×104, 1.97×104 and 1.62×104 respectively for the systems 1, 2 and 3 with the corresponding Sandell sensitivity values (μgcm−2), 0.0021, 0.0096 and 0.011. The optimized systems were used for the determination of gold present in some forensic jewellery and pharmaceutical samples and the results obtained were compared with the results of all samples determined by Inductively Coupled Plasma – Atomic Emission Spectrometric method and a few of them were also complemented by Energy Dispersive X–Ray Fluorescent spectral analysis.

Item Type: Article
Uncontrolled Keywords: Spectrophotometry, Systems1–3, Gold(III), o-dianisidine, Aniline sulphate, Catechol, Oxidation, ICP-AES, EDXRF, Jewellery, Pharmaceuticals
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: MUL SWAPNA user
Date Deposited: 25 Jun 2019 09:43
Last Modified: 28 Jun 2019 05:55
URI: http://eprints.uni-mysore.ac.in/id/eprint/3820

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