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- W1805335024 abstract "The photochemical isomerisation of 2-thiophenaldehyde 2-pyridylhydrazone (TAPH) in ethanolic solution was investigated and the E/Z ratio in the photostationary state was determined. (E)-TAPH scarcely reacted or did not react with metal ions whereas, after irradiation, (Z)-TAPH gave sensitive reactions with several metal ions. A photometric method was developed for the determination of nickel (0.017–0.9 µg ml–1) in aqueous ethanolic medium (50%V/V) at pH 10.7 with a detection limit of 0.005 µg ml–1 and a relative standard deviation of 1.03%. By considering the E/Z ratio in the photostationary state, the corrected stoicheiometry of the chelate was found to be 3:1 (ligand to metal). Applications of the method to the determination of nickel in special steels and environmental fume samples are described." @default.
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- W1805335024 date "1985-01-01" @default.
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- W1805335024 title "Photometric determination of nickel by means of photochemically generated (Z)-2-thiophenaldehyde 2-pyridylhydrazone" @default.
- W1805335024 doi "https://doi.org/10.1039/an9851001253" @default.
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