Instrumental Analysis of Nickel II in Solution

Nickel salt solutions can be readily analysed by atomic absorption or polarographically (Secs.2.4.3 2.5.4). 

Prepare a stock solution of 0.01 M solution of purest nickel sulphate or chloride. successive dilution, prepare 5 or more solutions in the concentration range of 2 x 10 -10 M. Follow the instructions of the manufacturer of the spectrometer, use an air/acetylene flame with a flow rate of 8.0 dm min and 3.0 dm min for the two gases respectively. Suitable wavelengths are 232.0 nm (major) and 234.6 or 351.5 nm. Very low concentrations of Ni in presence of cobalt have been determined by cathodic stripping voltametry, using standard additions (J.Chem.Educ.74 (1997)1444). 

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