|
Names of index |
index | ||
|
superior quality |
first-grade products |
Conforming products | |
|
chromaticity≤ |
20 |
30 |
40 |
|
Phosphoric acid content
H3PO4 %≥ |
85.0 |
85.0 |
85.0 |
|
chloride(以CIˉ计) %≤ |
0.0005 |
0.0005 |
0.001 |
|
sulphate(以SO42计) %≤ |
0.003 |
0.005 |
0.01 |
|
iron(以Fe计) %≤ |
0.002 |
0.002 |
0.005 |
|
Arsenic(以As计) %≤ |
0.0001 |
0.005 |
0.01 |
|
heavy metal(以pb计) %≤ |
0.001 |
0.001 |
0.05 |
