A Rapid Extraction Method for Atomic Absorption Spectroscopy Analysis of Zinc Oxide in Cosmetics and Skin Care Products

摘要

Zinc oxide levels in cosmetic formulations are commonly analyzed by atomic absorption (AA) spectroscopy using the fusion method for sample digestion, a labor-intensive and time-consuming process that causes lengthy delays in product manufacturing. In this report, we describe an aqua regia digestion method that is an efficient and accurate method for preparing samples for AA analysis of zinc oxide content in cosmetics and skin care products that may also be automated for additional laboratory efficiency.