指標

NiSO4晶體(優(yōu)級品)

NiSO4晶體(合格品)

檢測方法

外觀

翠綠色顆粒狀晶體、顏色均勻、無結(jié)塊、無雜物

目測

Ni

≥21. 50%

≥21. 50%

絡合滴定

Co

≤0.0010%

≤0.0020%

GB/T8647.1-2006

-

GB/T8647.10-2006

Cu

≤0.0010%

≤0.0020%

Fe

≤0.0010%

≤0.0020%

Mg

≤0.0010%

≤0.0020%

Pb

≤0.0010%

≤0.0020%

Zn

≤0.0010%

≤0.0010%

Cd

≤0.0010%

≤0.0010%

Mn

≤0.0010%

≤0.0010%

Si

≤0.0010%

≤0.0020%

Ca

≤0.0010%

≤0.0020%

FAAS ICP-MS

Na

≤0.0020%

≤0.0020%

Al

≤0.0010%

≤0.0010%

Li

≤0.0010%

≤0.0020%

Cr

≤0.0015%

≤0.0010%

Cl^-

≤ 0.010%

≤ 0.010%

離子選擇電極

水不溶物

≤0.02%

≤0.03%

GB11901-1989