Determination of Arsenic, Chromium and Lead in titanium dioxide pigments by ICP- OES with Concomitant Metals Analyser

Beena Sunilkumar; S. B. Singh

doi:10.32628/IJSRST196664

Authors

Beena Sunilkumar Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Government of India Begumpet, Hyderabad, Telangana, India
S. B. Singh Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Government of India Begumpet, Hyderabad, Telangana, India

DOI:

https://doi.org//10.32628/IJSRST196664

Keywords:

Titanium pigment, CMA-ICP OES, Arsenic, Chromium, Lead

Abstract

A simple method has been developed for the determination of trace toxic elements like arsenic, lead and chromium in titanium dioxide pigment samples by ICP OES attached with a Concomitant Metals Analyser. Open mineral acid decomposition was used for sample dissolution employing a mixture of nitric and hydrofluoric acids. The continuous online generation of hydrides into the plasma was achieved through a concomitant metals analyser. The recovery of arsenic, lead and chromium and the matrix effects of titanium on these elements have been studied with spiking experiments. The proposed method has been successfully applied to the determination of arsenic and other elements in titanium pigment samples. The continuous hydride generating system, Concomitant Metals Analyser (CMA) improved the sensitivity of analysis nearly five times in pigment samples. The precision of the measurements was found to be less than 10% RSD.

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