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A.NiSO₄·7H₂O 240~260g/L，HCl 120~130mL/L
B.NiSO₄·7H₂O 150g/L，NH₄Cl 20g/L，H₃BO₃ 25g/L，pH5.6-5.9
C.NiSO₄·7H₂O 200~250g/L，NaCl 7~12g/L，H₃BO₃ 20-25g/L，檸檬酸鈉50-300g/L，pH7.0~7.2
D.NiSO₄·7H₂O 120~150g/L，NaCl 7~12g/L，H₃BO₃ 30~45g/L，pH5.0-5.6

A.0.25-0.3微米
B.1.2-2.5微米
C.6-12微米
D.>6微米