Voltammetric determination of aluminium(III) using a chemically modified electrode

✍ Scribed by Alison J. Downard; H. Kipton; J. Powell; Shuanghua Xu

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 569 KB
• Volume: 251
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(91)87129-u

✦ Synopsis

An alizarin-modified electrode for the voltammetric determination of aluminium(III) is reported. The single-use modified electrode is simply prepared by dip-coating a high-density graphite electrode in an N, N-dimethylformamide solution of alizarin. Optimum experimental conditions for aluminium(III) determination include a solution pH of 8.4 f 0.2, an accumulation time of 1 min and use of the differential-pulse mode for measurement of the oxidation peak of the aluminium(III)-alizarin complex. The detection limit is 1.5 X lo-' M, the response is linear up to 1.0 X 10e5 M and the relative standard deviation for replicate preparations of the electrode [at 7.5 x 10W6 M Al(III)] is 3.8%. The determination of aluminium in soil samples is reported.