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Preliminary Study of Cosmetic Coloured Contact Lenses Chemical Elements Analysis using Energy Dispersive X-Ray Spectroscopy

Syazwan Hafiz Mohd, Wan Elhami Wan Omar and Ai-Hong Chen

Pertanika Journal of Tropical Agricultural Science, Volume 25, Issue S, March 2017

Keywords: Colour additives, cosmetic coloured contact lens, elemental analysis, energy dispersive x-ray analysis

Published on: 05 Dec 2017

This paper examines the chemical elements used as colour additives in cosmetic coloured contact lenses (Cos-CCL) using Field Emission Scanning Electron Microscope equipped with Energy Dispersive X-ray Spectroscopy (FESEM-EDX) analysis. The samples comprised two different Cos-CCL brands and colours (sample A1-black iris colour & B1-gray iris colour) with their respective clear contact lens counterparts as controls (sample A2 & B2). The parameters of Cos-CCL were observed carefully so that they resembled their respective controls. All the samples were analysed for chemical element characterisation by using EDX spectroscopy surface mapping analysis on both front and back surfaces. EDX spectroscopy point analysis was done on cross-section surface of Cos-CCL when colour additive pattern could not be detected by FESEM on either surface. FESEM-EDX spectroscopy analysis has revealed iron element in the colour additives of the A1 sample and aluminium elements in the B2 sample. These two elements were not present in the respective control samples. It can be concluded that iron and aluminium elements are exclusively attributed to the colour additive in Cos-CCL samples. It is important for manufacturers of Cos-CCL to disclose information of their products and create greater awareness on the risks facing users.

ISSN 1511-3701

e-ISSN 2231-8542

Article ID

JST-S0157-2016

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