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Adsorptive complex catalytic polarographic determination of germanium in soils and vegetables

✍ Scribed by Shi Jinhui; Jiao Kui

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
545 KB
Volume
309
Category
Article
ISSN
0003-2670

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✦ Synopsis

The very sensitive adsorptive complex catalytic wave of Ge(IV)-catechol-NaBr03 with acetic acid-sodium acetate as supporting electrolyte in linear-sweep polarography has been successfully applied to the determination of germanium in vegetables and soils. The optimum experimental conditions are: 0.07 M acetic acid-sodium acetate buffer of pH 4.6, 1.5 X 10m3 M catechol and 0.1 M NaBrO,. The detection limit of Ge(lV) is 1.0 X lo-" M and the linear range is 1.0 X lo-"-7.0 X 10m6 M. Different acid digestion procedures were compared, and a HNO,-HClO,-HF digestion method for the soil sample and a HNO,-HClO,-H2S0, digestion method for the vegetable sample were adopted. The experiments show that the polarographic wave behaves as an adsorptive complex wave and also as a parallel catalytic wave.

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