|
Items |
Index (Food Grade) |
Index (Common Grade) |
|
Appearance |
White or jasmine powder, soluble in water, sweet taste. |
White or jasmine powder, soluble in water, sweet taste. |
|
Differentiation |
positive ninhydrin reaction |
positive ninhydrin reaction |
|
Total nitrogen |
≥15% |
≥14.5% |
|
Weight Loss on drying |
≤2.5% |
≤4% |
|
Residue on ignition |
≤3.0% |
≤5% |
|
pH value |
5.0-7.0 |
5.0-7.0 |
|
Total Glycin, L-alanine, L-serine |
≥85% |
≥82% |
|
Heavy Metal ( as Pb) |
≤5ppm |
≤10ppm |
|
As |
≤0.5ppm |
≤1ppm |
|
Bacteria |
≤100 |
≤100 |
|
Coli group (MPN)(pieces/100g) |
≤30 |
≤30 |
|
Pathogenic Bacteria |
No detection |
No detection |