| 質(zhì)量指標(biāo) |
Specification |
GB 1886.336-2021 |
FCC VII |
| 含量（以干基計(jì)），w/% |
Content (On dry basis),w/% |
98.0-103.0 |
98.0-103.0 |
| pH值（10g/L溶液） |
pH value (10g/L Solution ) |
4.1-4.7 |
4.1-4.7 |
| 水不溶物，w/%??????????????? ≤ |
Insoluble substances,w/%??? ≤ |
0.2 |
0.2 |
| 重金屬（以Pb計(jì)），mg/kg??????? ≤ |
Heavy metal(as Pb),mg/kg?? ≤ |
10 |
———— |
| 鉛（Pb），mg/kg???????????????? ≤ |
Lead(Pb),mg/kg?????????? ≤ |
4.0 |
4 |
| 砷（As），mg/kg???????????????? ≤ |
Arsenic(As),mg/kg??????? ≤ |
3.0 |
3 |
| 氟化物（以F計(jì)），mg/kg???????? ≤ |
Fluorides (as F),mg/kg ????≤ |
30.0 |
50 |
|
干燥失重，w/%
|
NaH2PO4?? ?≤ |
Loss on drying,w/% |
NaH2PO4?? ≤ |
2.0 |
2.0 |
| NaH2PO4·H2O |
NaH2PO4·H2O |
10.0-15.0 |
10.0-15.0 |
| NaH2PO4·2H2O |
NaH2PO4·2H2O |
20.0-25.0 |
20.0-25.0 |
