|
Item
|
Excellent Grade
|
First Grade
|
|
NaBF4,%≥
|
97.0
|
95.0
|
|
Phosphate(PO4),% ≤
|
0.01
|
0.02
|
|
Iron(Fe), % ≤
|
0.005
|
0.008
|
|
Heavy Metal(Pb),% ≤
|
0.10
|
0.15
|
|
Chloride(Cl),% ≤
|
0.10
|
0.15
|
|
Sulfate(SO4),% ≤
|
0.10
|
0.15
|
|
Silicate(SiO2),% ≤
|
0.01
|
0.02
|
|
Water-soluble Test
|
qualified
|
qualified
|
