Item

Standard

Result

Identification

Positive

Positive

Loss on drying

≤ 6.0%

4.77%

pH value

6.0 - 9.5

8.30

Heavy metal

≤ 30 ppm

< 30 ppm

As element

≤ 5 ppm

< 5 ppm

Particle size VC

≥ 95.0% (80 meshes)

98.0%

Content of stable VC

≥ 35.0%

35.58%