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ITEM

STANDARD

ANALYTICAL METHOD

Appearance 

White powder, gloss, no mechanical admixture

GB /T 5492

Smell 

Innate odor, no peculiar smell

GB /T 5492

Moisture(%)               

≤ 20.0

GB/T 12087

Whiteness(%)                            

≥ 89.0

GB/T 22427.6

spot,pc/cm2

≤5.0

GB/T 22427.4

Ash(dry),(%)              

≤ 0.5

GB/T 22427.1

pH(33%)

5.0~8.0

GB/T 8884

Fineness,(%)                              

≥ 99.5

GB/T 22427.5

Peak viscosity(5%),BU

≥ 1500 

GB/T 22427.7

acetyl (%)                  

≤ 2.5

GB 29925

SO2  (mg/kg)             

≤ 30

GB/T5009.34

Lead(Pb)/(mg/kg)   

≤ 1.0

GB/T 20380.3

Arsenic(As)/(mg/kg)       

≤ 0.5

GB/T 20380.1

aerobic bacterial count(cfu/g)

≤ 10000

GB/T 4789.2

coli group(MPN/100g)

≤ 30

GB/T 4789.3

pathogenic bacteria(

staphylococcus aureus, shigella

, salmonella)

Absent

GB/T 4789.4

GB/T 4789.5

GB/T 4789.10