Research Article
Microbial and Heavy Metal Contaminant of Antidiabetic Herbal Preparations Formulated in Bangladesh
Table 5
Permissible limit of heavy metal in herbal drugs.
| | Heavy/toxic metal | WHO | US FDA | HSA Singapore | Chinese Pharmacopoeia |
| | Cadmium | 0.20 ppm | 0.30 ppm | 0.05 ppm | 0.30 ppm | | Lead | 10.00 ppm | 10.00 ppm | 20.00 ppm | 5.00 ppm | | Arsenic | 10.00 ppm | 10.00 ppm | 5.00 ppm | 2.00 ppm | | Mercury | 1.00 ppm | 1.0 ppm | 0.50 ppm | 0.20 ppm | | Copper | 20.00 ppm | 20.00 ppm | 150.00 ppm | 20.00 ppm | | Zinc | 50.00 ppm | 50.00 ppm | — | — |
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US FDA: United States Food and Drug Administration; HAS: Health Science Authority.
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