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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Na2HPO4.12H2O计) % Main Content Na2HPO4.12H2O |
≥97 |
≥97 |
五氧化二磷(以P2O5计) % Phosphorus pentoxide |
≥19.2 |
≥19.2 |
PH 值 PH Value of 1% water solution |
8.8-9.2 |
8.8-9.2 |
重金属 % Heavy metals, as Pb |
|
≤0.001 |
氯化物(以计) % Chloride (as Cl) |
≤0.05 |
≤0.014 |
硫酸盐(以计) % Sulphate (as SO4) |
≤0.7 |
≤0.25 |
砷(以As计) % Arsenic, as As |
≤0.05 |
≤0.0003 |
氟化物(以F计) % Fluoride, as F |
≤0.05 |
≤0.005 |
水不溶物 % Water insoluble |
≤0.05 |
≤0.05 |
外观 Appearance |
白色粒状结晶 White Granular Crystal |
白色粒状结晶 White Granular Crystal |