Cosmetic products for children and adults – determination of As, Ni, Pb AND Zn contents

Resumen

The objective of this work was to determine the concentration of potentially toxic elements in different cosmetic products, using simple and accessible digestion methodologies, and spectroscopic techniques. A total of twelve products were selected, purchased and analyzed, which include blush (BL), eye shadow (SH), face powder (PO) and powdered paint for children (PP). The samples were dried (at 100ºC), crushed and homogenized. Two methodologies were used for digestion. The contents of Ni, Pb and Zn were quantified by atomic absorption spectrometry flame (FAAS), and the contents of As by atomic absorption spectrometry with electrothermal atomization in a graphite oven (GFAAS). In general, the samples showed contents below the detection limit (LOD) for Ni, Pb, As and Zn. However, some PP samples showed Zn contents between 2 ± 1 and 442 ± 32 mg L-1. This result is probably due to the use of some natural or inorganic pigments, and suggests the following actions: (1) regular monitoring of potentially toxic elements in PP products; (2) new studies on Zn levels in cosmetic products for children; and (3) the creation of legislation to regulate the composition of PP products.