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

Arsenic

2.0 mg/kg

Cadmium

0.3 mg/kg

Lead

5.0 mg/kg

Mercury

0.2 mg/kg

Pesticide

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

Mycotoxin

Aflatoxin B₁

5 μg/kg

Aflatoxins (sum of B₁, B₂, G₁ and G₂)

10 μg/kg