Cosmetics - Analytical methods - Measurement of traces of heavy metals in cosmetic finished products using ICP/MS technique (ISO 21392:2021, corrected version 2021-12)

This technical document establishes a standardized analytical procedure for the quantification of trace heavy metals within finished cosmetic products. The method relies on Inductively Coupled Plasma Mass Spectrometry (ICP-MS) as the primary detection technique, offering high sensitivity and precision for multi-element analysis. It specifies the necessary sample preparation steps, including digestion protocols designed to ensure the complete solubilization of metallic elements from the complex cosmetic matrix. The outlined operational parameters detail instrument settings, calibration requirements, and quality control measures to guarantee the reliability and reproducibility of test results across different laboratories. This approach is essential for regulatory compliance, enabling manufacturers and testing facilities to accurately determine the presence and concentration of elements such as lead, arsenic, cadmium, and mercury. By adhering to these defined analytical conditions, the methodology supports safety assessments and ensures that products meet rigorous quality standards regarding elemental impurities. The procedure aligns with international best practices for elemental analysis in the cosmetic industry.