Cosmetics are widely used products in people's daily lives, and their quality and safety directly affect consumers' health. With the increasing attention to the safety of cosmetics, heavy metal pollution has become a focus of industry regulation and consumer concern. Metal elements may come from raw materials, production processes, or packaging materials, and once exceeded, they may pose a threat to human health.

Certain metal elements, such as lead (Pb), mercury (Hg), cadmium (Cd), and arsenic (As), may cause serious harm to human health when exceeded. For example, lead may cause damage to the nervous system, mercury can affect the kidneys and nervous system, cadmium is carcinogenic, and arsenic may cause skin lesions and cancer. Long term exposure to these harmful metals increases the risk of chronic poisoning, especially for pregnant women, infants, and sensitive populations, where the harm is even more severe.

Therefore, the detection of metal elements in cosmetics is crucial.