Availability and chemical composition of traditional eye cosmetics ('kohls') used in the United Arab Emirates of Dubai,Sharjah,Ajman,Umm Al-Quwain,Ras Al-Khaimah,and Fujairah

摘要

This study was undertaken in order to determine the availability and chemical composition of potentially lead-toxic traditional eye cosmetics ("kohls") in six of the seven emirates of the United Arab Emirates (UAE).Thus of especial interest was the percentage of the purchased samples that contained the toxic element lead.A total of 53 observably different kohl samples were found to be available overall in the six emirates:Dubai,Sharjah,Ajman,Umm Al-Quwain,Ras Al-Khaimah,and Fujairah.It was found that 19 of these samples had been previously analyzed by us in studies covering Oman,Abu Dhabi (city),and Egypt (Cairo).The techniques of X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) were used to analyze the remaining 34 samples.Overall,for the 53 kohl samples,it was found that 20 (38%) contained a lead compound (galena,PbS) as the main component.The other main components were found to be one of the following:amorphous carbon,calcite/aragonite (CaCO_3),goethite (FeO(OH)),hematite (Fe_2O_3),sassolite (H_3BO_3),talc (Mg_3Si_4O_(10)(OH)_2),or zincite (ZnO).