Liquid-liquid extraction with 2-acetylpyridinebenzoylhydrazone in the determination of traces of copper,nickel, cobalt and zinc by atomic absorption spectrometry

Trace amounts of Cu, Ni, Co and Zn in aqueous solutions are determined by their simultaneous extraction with 2-acetylpyridinebenzoylhydrazone followed by flame atomic absorption spectrometry. Isoamyl alcohol is the preferred solvent. Calibration graphs are linear, usually over the range 0–0.2 mg 1^?1 of aqueous phase. There are few interferences from other ions present in 500–1000-fold amounts.