Selective extractive spectrophotometric determination of germanium with N-hydroxy-N,N′-diphenylbenzamidine and iodide

✍ Scribed by Neena Nashine; R.K. Mishra

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 293 KB
• Volume: 285
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)80077-4

✦ Synopsis

A simple and rapid spectrophotometric method for the determination of germanium is described. It is based on the reaction of Ge(IV) with I-in 4.2-8.4 M H,SO,, and extraction of the tetraiodogermanate(IV) complex so formed into chloroform with N-hydroxy-N,N'diphenylbenxamidine. The apparent molar absorptivity of the yellow coloured complex formed is 1.5 X lo4 1 mol-' cm-' at A _ = 395 nm. The detection limit is 0.1 pg Ge ml-'. The method is highly selective as few of the tested common metal ions and anions interfere.