| ≥1 piece |
It is also called the " Silk Essence " or “Silk 90”, which the main composition are free amino acids and less amount of di-peptide and tri-peptide with the average molecular weight of 90, It’s soluble, PH value between 5 to 7, positive ninhydrin reaction.
·Quality Index Items Index (Food Grade) Index (Common Grade)
Property 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 ≥14.5% ≥14%
Weight Loss on drying ≤2.5% ≤4%
Residue on ignition ≤1.0% ≤4%
PH value 5.0-7.0 5.0-7.0
Total Glysin, L-alanine, L-senine ≥85% ≥80%
Heavy Metal ( as Pb) ≤10ppm ≤20ppm
As ≤0.5ppm ≤1ppm
Bacteria ≤100 ≤100
Coli group (MPN)￡¨??/100g￡? ≤30 ≤30
Pathogenic Bacteria Not detected Not detected