磷酸盐及硅酸盐(以SiO₃计)

≤0.005

≤0.01

镁(Mg)

≤0.003

≤0.005

钾(K)

≤0.01

≤0.02

钙(Ca)

≤0.007

≤0.01

铁(Fe)

≤0.001

≤0.002

重金属(以Pb计)

≤0.001

≤0.002