| ≥1 piece |
|
Item
|
Unit
|
Standard value
|
|
Assay(as dry)
|
%
|
≥99.0-100.5
|
|
Loss on dry
|
%
|
≤0.0003
|
|
Fe(Fe)
|
%
|
≤0.0025
|
|
As (as As)
|
%
|
≤0.002
|
|
Heavy metals(as Pb)
|
%
|
≤17
|
|
alkalinity(as Na2CO3)
|
-
|
pass test
|