Development and Validation of a Method for the Analysis of Zinc Oxide in Cosmetic Matrices by Flame Atomic Absorption Spectroscopy

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Sample</td><td class="align_center">Average found concentration (% w/w ± SD)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Lipstick 1</td><td class="align_center">3.5341 ± 0.0137</td></tr><tr><td class="align_left">Lipstick 2</td><td class="align_center">3.5994 ± 0.0058</td></tr><tr><td class="align_left">Lipstick 3</td><td class="align_center">3.541 ± 0.0001</td></tr><tr><td class="align_left" colspan="2"><hr/></td></tr><tr><td class="align_left">Foundation 1</td><td class="align_center">8.7116 ± 0.0311</td></tr><tr><td class="align_left">Foundation 2</td><td class="align_center">8.8452 ± 0.0062</td></tr><tr><td class="align_left">Foundation 3</td><td class="align_center">8.8172 ± 0.0241</td></tr><tr><td class="align_left" colspan="2"><hr/></td></tr><tr><td class="align_left">Emulsion 1</td><td class="align_center">3.8630 ± 0.0030</td></tr><tr><td class="align_left">Emulsion 2</td><td class="align_center">3.7872 ± 0.0001</td></tr><tr><td class="align_left">Emulsion 3</td><td class="align_center">3.7656 ± 0.0192</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>ZnO content in samples of lipstick, foundation, and emulsion products.</div>

Journal of Analytical Methods in Chemistry

tab3

Table 3

Table 3: Development and Validation of a Method for the Analysis of Zinc Oxide in Cosmetic Matrices by Flame Atomic Absorption Spectroscopy 