|
Executive standard:Q/SWYF001-2011 |
|
|
Item |
Index |
|
Ammonium fluoride contentw/％ ≥ |
95.0 |
|
Free acid (HF) w/% ≤ |
1.0 |
|
Fluosilicate[ (NH4) 2SiF6] w/% ≤ |
0.2 |
|
Sulfatew/% ≤ |
0.2 |
|
Moisture w/% ≤ |
4.0 |
|
Iron Few/% ≤ |
0.01 |
|
Heavy metal (Pb) w/% ≤ |
0.001 |
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