TEST ITEMS

ANALYSIS METHODS

SPECIFICATION

Appearance

Sensorial

Brownish/Yellowish Powder

Odor

Sensorial

Light sourness

Solubility

Sensorial

Soluble in water , insoluble in organic solvents , ex: alcohol etc

Purity UV

Q/PTHG

≥ 90%

PH

Q/PTHG

2-3

Transmittance UV

Q/PTHG

≥ 60%

Turbidity

Q/PTHG

≤ 40%

Loss on drying

Q/PTHG

< 8%

Protein

GB5009.5-94

< 5%

Heavy metal (by Pb)

GB5009.12-94

≤ 10 ppm

Arsenic

GB5009.11-94

≤ 2.0 ppm

Microbial count.

GB4789.2-94

< 3x103cfu/g

Escherichia coli

GB4789.3-94

Negative