PRECONCENTRATION OF TRACE AMOUNTS OF TUNGSTEN ON AMBERLITE XAD-7 FOR ITS SPECTROPHOTOMETRIC DETERMINATION IN HOT-SPRING WATER


SOYLAK M. , elçi l. , doğan m.

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, vol.351, pp.308-310, 1995 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 351
  • Publication Date: 1995
  • Doi Number: 10.1007/bf00321654
  • Title of Journal : FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
  • Page Numbers: pp.308-310

Abstract

A preconcentration procedure, using a short column loaded with Amberlite XAD-7, is proposed for the spectrophotometric determination of traces of tungsten. The procedure is based on the retention of tungsten on the resin after its reduction to a W(V)-thiocyanate complex with tin(II) chloride solution. Interference effects have been shown to be neglible for foreign ions including Ca2+, Mg2+, Na+, SO42-, F-, NO3-, Cu2+, Fe3+ and Mo6+ The procedure has been applied to hot spring water with satisfactory results (Recovery > 95%; relative standard deviation < 5%; relative error < 3%).