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質(zhì)量指標(biāo) | Specification | GB 25565-2010 | FCC VII | ||||
含量,w/% ≥
| 無水物(以灼燒干基計(jì), Na3PO4) |
Assay,w/% ≥
| Anhydrous (Ignited Basis, Na3PO4) | 97.0 | 97.0 | ||
一水物(以灼燒干基計(jì),Na3PO4) | Monohydrate (Ignited Basis, Na3PO4) | ||||||
Dodecahydrate(Ignited Basis, Na3PO4) | 90.0 | ||||||
十二水合物(Na3PO4·12H2O) | |||||||
重金屬(以Pb計(jì)),mg/kg ≤ | Heavy Metals (Pb), mg/kg ≤ | 10 | ———— | ||||
鉛(Pb), mg/kg ≤ | Pb, mg/kg ≤ | 4 | 4 | ||||
氟化物(以F計(jì)),mg/kg ≤ | Fluorides (F), mg/kg ≤ | 50 | 50 | ||||
水不溶物,w/% ≤ | Insoluble Substances , w/% ≤ | 0.2 | 0.2 | ||||
pH(10g/L溶液,25℃) | pH (10g/L,25℃) | 11.5-12.5 | ———— | ||||
砷(As),mg/kg ≤ | As, mg/kg ≤ | 3 | 3 | ||||
灼燒減量, w/% | Na3PO4 ≤ | Loss On Ignition, w/% | Na3PO4 ≤ | 2.0 | 2.0 | ||
Na3PO4·H2O | Na3PO4·H2O | 8-11 | 8.0-11.0 | ||||
Na3PO4·12H2O | Na3PO4·12H2O | 45-57 | 45.0-57.0 |