This standard specifies the determination method of calcium, mg aluminum, silicon, titanium, cobalt, antimony and zinc in plastics and their products by microwave ashing Inductance coupled plasma emission Light spectrum. It is suitable for the determination of the content of the above elements in plastics and their products. The determination limits are mg, titanium, zinc: 0.1 mg/kg, cobalt: 0.2 mg/kg, calcium: 0.5 mg/kg, aluminum, silicon: 1.0 mg/kg, antimony: 2.0 mg/kg. The normative reference documents include the preparation of standard solutions for the determination of impurities in chemical reagents, the specifications and test methods for analytical laboratory water, and the verification procedures for Inductance coupled plasma Atomic EmissionSpectrometer. After the sample was treated by microwave ashing, the residue was melted with Boricacid tetralithium fluoride flux, the molten mixture was dissolved in tartaric acid and muriatic acid solution, the test solution was diluted bandwidth evaluation with water, and then the element content was determined by Inductance coupled plasma emission Light spectrum instrument.