Abstract
A new method is proposed for collecting traces of nickel from aqueous solution by precipitation as the α-furildioxime complex and adsorption of this onto microcrystalline naphthalene. The precipitate is collected, dried, and dissolved in chloroform, and the nickel is determined spectrophotometrically at 438 nm. The linear calibration range is 2–35 μg/10 ml. The molar absorptivity is 1.6 × 10 4 l. mole −1. cm −1. The main advantage is that the nickel is collected quantitatively after only a few seconds'shaking. The effect of varying pH, amount of reagent, naphthalene or buffer, shaking and standing time, and interferences have been investigated.
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