质量指标 |
specification |
gb 25561-2010 |
fcc vii |
含量(以干基计),w/% ≥ |
content(on dry basis), w/% ≥ |
98.0 |
98.0 |
(as),mg/kg ≤ |
arsenic(as), mg/kg ≤ |
3 |
3 |
氟化物(以f计),mg/kg ≤ |
fluoride(as f),mg/kg ≤ |
10 |
10 |
重金属(以pb计),mg/kg ≤ |
heavy metal(as pb), mg/kg ≤ |
10 |
———— |
水不溶物,w/% ≤ |
insoluble substances, w/% ≤ |
0.2 |
0.2 |
铅(pb),mg/kg ≤ |
lead (pb), mg/kg ≤ |
2 |
2 |
干燥减量,w/% |
无水物 ≤ |
loss on drying, w/% |
anhydrous≤ |
2.0 |
2.0 |
ph值(10g/l 溶液,25℃) |
ph value(10g/l,25℃) |
8.6-9.4 |
———— |