| ≥1 piece |
|
Index |
FCCa ?ê |
|
GB6225-86 |
HG2921-1999 |
FCCa ?ê |
E282 |
|
Appearance |
White |
|
White |
White |
White |
White |
|
Assay % ≥ |
99.0 100.5 |
|
99.0 |
99.0 |
99.0 100.5 |
99.0 |
|
Water insoluble % ≤ |
0.20 |
|
0.15 |
0.30 |
0.20 |
0.30 |
|
PH 10% |
7.5 10.5 |
|
7-9 |
7 9 |
7.5 10.5 |
6 9 |
|
Loss on drying %≤ |
5.0 |
|
9.5 |
9.5 |
5.0 |
4.0 |
|
Free acid %≤ |
0.30 |
|
0.11 |
pass |
0.30 |
|
|
Free alkalinity %≤ |
0.15 |
|
0.06 |
pass |
0.15 |
|
|
Arsenic % ≤ |
|
|
0.0002 |
0.0004 |
|
0.0003 |
|
Heavy metals % ≤ |
|
|
0.001 |
0.001 |
|
0.001 |
|
Fluoride %≤ |
0.003 |
|
0.003 |
0.003 |
0.003 |
0.001 |
|
Magnesium % ≤ |
0.4 |
|
0.4 |
|
0.4 |
|
|
Lead %≤ |
2mg/kg |
|
0.0002 |
|
2mg/kg |
0.0005 |
|
Mercury % ≤ |
|
|
|
|
|
0.0001 |
|
Iron % ≤ |
|
|
|
|
|
0.005 |