指标名称

规格

分析纯

化学纯

含量 (K2S2O7),w/%

≥98.0

≥97.0

澄清度试验/号

≤3

≤5

水不溶物, w/%

≤0.01

≤0. .015

氯化物( (CI), w/%

≤0.001

≤0.003

磷酸盐 (PO4) 3

≤0.001

≤0. .0015

砷 (As),w/%

≤0. .000 3

≤0. .0005

镁 (Mg),w/%

≤0.001

≤0 .002

钙 (Ca), w/%

≤0.002

≤0 .005

铁 (Fe),w/%

≤0.001

≤0 .003

重金属(以Pb计),w/%

≤0.0006

≤0 .002