Determination of 4 Species of Trace Elements in Cosmetics by Super Microwave Digestion-Inductively Coupled Plasma Mass Spectrometry

According to the microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS), 53 batches of powder cosmetics samples from various cities, prefectures and counties in Gansu province were tested. The contents of lead, arsenic, mercury and cadmium in cosmetics were quantitatively analyzed using an online internal standard correction and external standard method. When the curve concentration was 0~100 μg/L(Hg: 0~5 μg/L), the detection concentration was 0.000 016~0.004 6 mg/kg, the linear correlation coefficients were all greater than 0.998 5, the internal standard RSD was less than 5.0%, and the recovery was 78.3%~104.8%. The test results showed that the method is simple, fast, time-saving, cost saving, highly sensitive and has a good reproducibility in the process of simultaneous determination of four elements in powder cosmetics.