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质量标准
Quality standard
项目 Iterms |
工业级 Industrial Grade |
食品级 Food Grade |
主含量(以NH4H2PO4计) % Main Content |
≥98 |
≥98 |
五氧化二磷(以P2O5计) % Phosphorus pentoxide |
≥61 |
≥61 |
氮(以N计) % Nitrogen, as N |
≥11.8 |
≥11.8 |
PH 值 PH Value of 1% water solution |
4.4-4.8 |
4.4-4.8 |
水份 % Moisture |
0.2 |
0.2 |
重金属 % Heavy metals, as Pb |
|
≤0.001 |
砷(以As计) % Arsenic, as As |
|
≤0.0003 |
氟化物(以F计) % Fluoride, as F |
|
≤0.005 |
水不溶物 % Water insoluble |
≤0.10 |
≤0.10 |
外观 Appearance |
白色颗粒晶体 White Granular Crystal, easily soluble in water |
白色颗粒晶体 White Granular Crystal, easily soluble in water |