质量指标 | Specification | GB25559-2010 | FCC,1999 | |
含量(以Ca计) , w/% | 无水物 | Content(As Ca ) | 16.8-18.3 | 16.8-18.3(Anhydrous) |
一水物 | 15.9-17.7 | 15.9-17.7(Monohydrate) | ||
砷 (As), mg/kg ≤ | Arsenic | 3 | 3 | |
铅 (Pb), mg/kg ≤ | Lead | 3 | 5 | |
重金属(以P b计),mg/kg ≤ | Heavy Mental(As P b) | 10 | 15 | |
氟化物(以F计), mg/kg ≤ | Fluoride | 25 | 50 | |
干燥减量,无水物,w/% ≤ | Loss On Drying | 1.0 | 1.0( Anhydrous) | |
灼烧减量,一水物,w/% ≤ | Loss On Ignition | 14.0-15.5 | 14.0-15.5( | |
澄清度 | Clarity | 通过试验 | -- | |
碳酸盐 | Carbonate | 通过试验 | -- | |
游离酸及其副盐 | Free Acid & Its Auxiliary Salt | 通过试验 | -- |