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DOI: 10.1039/A803952F (Paper) Reference Section for: Analyst, 1998, 123, 2149-2153

Separation and determination of scandium by reversed-phase high-performance liquid chromatography with diacetyl-N,N-bis(4-hydroxybenzoylhydrazone) as a pre-column chelating agent

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Nobuo Uehara, Tetsuya Tanaka and Yoshio Shijo

Abstract

An HPLC method for the determination of scandium(III) was developed, with diacetyl-N,N-bis(4-hydroxybenzoylhydrazone) (DBHB) as a pre-column chelating agent. Tetradentate DBHB formed a 1:1 chelate with ScIII ion. The ScIII–DBHB chelate was separated on a C18–silica gel column with a mobile phase of acetonitrile–water (30 + 70 m/m) containing 5 × 10–3 mol kg–1 tetramethylammonium bromide and 2.5 × 10–3 mol kg–1 hexamethylenetetramine buffer. Using a 100 mm3 injection at 420 nm, the detection limit for ScIII was 8.4 × 10–10 mol dm–3 (37 ng l–1). Rare earth elements gave no peaks on the chromatogram. The method can detected ScIII in river water without preconcentration.

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