质量指标

Specification

GB25567-2010

焦磷酸二氢二钠(Na2H2P2O7),w/%

Content(Na2H2P2O7)

93.0~100.5

砷( As),mg/kg                    ≤

Arsenic

3

氟化物(以F计),mg/kg             ≤

Fluoride

50

重金属(以Pb计),mg/kg            ≤

Heavy Metals (Pb)

10

水不溶物,w/%                 ≤

Water Insolubles

1.0

铅(Pb),mg/kg                     ≤

Lead

2

pH(10g/L 溶液)

pH Value

4.0±0.5