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Table 2 Hong Kong Chinese Materia Medica Standards recommended limits of heavy metals, pesticide residues and mycotoxins

From: Harmonization of monographic standards is needed to ensure the quality of Chinese medicinal materials

Heavy metal Limits
Arsenic 2.0 mg/kg
Cadmium 0.3 mg/kg
Lead 5.0 mg/kg
Mercury 0.2 mg/kg
Aldrin and Dieldrin (sum of) 0.05 mg/kg
Chlordane (sum of cis- trans- and oxychlordane) 0.05 mg/kg
DDT (sum of p,p"-DDT, o,p'-DDT, p,p'-DDE and p,p'-TDE 1.0 mg/kg
Endrin 0.05 mg/kg
Heptachlor (sum of heptachlor and heptachlor epoxide) 0.05 mg/kg
Hexachlorobenzene 0.1 mg/kg
Hexachlorocyclohexane isomers (α-, β- and δ-hexachlorocyclohexane) 0.3 mg/kg
Lindane (γ-Hexachlorocyclohexane) 0.6 mg/kg
Quintozene (sum of quintozene, pentachloroaniline and methyl pentachlorophenyl sulphide) 1.0 mg/kg
Aflatoxin B1 5 μg/kg
Aflatoxins (sum of B1, B2, G1 and G2) 10 μg/kg