指標(biāo)名稱

規(guī)格

分析純

化學(xué)純

含量 (K2S2O7),w/%

≥98.0

≥97.0

澄清度試驗(yàn)/號(hào)

≤3

≤5

水不溶物, w/%

≤0.01

≤0. .015

氯化物( (CI), w/%

≤0.001

≤0.003

磷酸鹽 (PO4) 3

≤0.001

≤0. .0015

砷 (As),w/%

≤0. .000 3

≤0. .0005

鎂 (Mg),w/%

≤0.001

≤0 .002

鈣 (Ca), w/%

≤0.002

≤0 .005

鐵 (Fe),w/%

≤0.001

≤0 .003

重金屬(以Pb計(jì)),w/%

≤0.0006

≤0 .002