Solvent extraction and spectrophotometric determination of nickel(II) with thiazole-2-carbaldehyde 2-quinolylhydrazone

Makoto OTOMO, Tsuyoshi WATANABE, Mitsuru MORIYA
1986 Analytical Sciences  
A sensitive method for the extractive spectrophotometric determination of nickel(II) with thiazole-2-carbaldehyde 2quinolylhydrazone (TAQH) has been described. Nickel(II) reacts with TAQH at pH 8.7-9.5 to form a 1:2 metal to ligand complex that is extractable into many organic solvents. The species when extracted with benzene and measured at 522 nm obeys Beer's law over the range up to 0.7 µg ml-' of nickel. The molar absorptivity is 7.17x104 I mol-' cm-' at 522 nm. The method has been
more » ... d has been satisfactorily applied to the determination of nickel in two standard alloy steel samples.
doi:10.2116/analsci.2.549 fatcat:dvhjm3ayevbppl4iies3gwnptm