Nickel-63 is separated from fission and corrosion products by anion ion-exchange resins and organic extractions. Nickel-63 is purified in chloroform as nickel dimethylglyoxime and back extracted with dilute HCl and then complexed with ammonium thiocyanate and precipitated with pyridine. Nickel precipitate is then dissolved in cocktail for counting with a liquid scintillation counter.

1. Reagants

   Ni carrier (10.0 mg/mL)

   Fe, Co, Cs, Mn hold-back carrier (~10 mg/mL)

   HCl—6N concentrated

   NaOH—1N

   NH₄OH—concentrated

   Anion resin—AG 1×10 50–100 mesh chloride form

   Dimethylglyoxime—1% solution in Ethanol

   Liquid scintillation (POPOP solution) cocktail

   Toluene

   Chloroform

   Analytical filter paper pulp—Ash free

   Pyridine

   NH₄SCN 1% solution+Pyridine 1% solution=rinse solution

   NH₄SCN—20% solution

   HAC-1N

   Alconex—0.25%