Fucoidan, a complex sulfated polysaccharide containing substantial percentages of L-fucose and sulfate ester groups, is a constituent of brown algae and some marine invertebrates. Besides L-fucose, it frequently contains D-xylose, D-galactose, D-mannose and D-glucuronic acid. Fucoidan has no determined molecular formula, and its structure built up mainly of (1→2)-linked, 4-O-sulfated fucopyranose residues has been generally accepted for fucoidan from Laminaria Japonica/Undaria Pinnatifida.
| Test items | Spcification |
| Total sugar content,% | ≥20 |
| L-fucose,% | ≥10 |
| Moisture,% | ≤15.0 |
| Lead, mg/kg | ≤1 |
| Inorganic arsenic, mg/kg | ≤1.5 |
| Methylmercury, mg/kg | ≤0.5 |
| Polychlorinated biphenyls, mg/kg | ≤2.0 |
| Aerobic bacterial count, cfu/g | ≤1000 |
| Mould, cfu/g | ≤300 |
| Coli group, MPN/100g | ≤30 |
| Pathogenic bacteria | Can’t be detected |
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