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, cilt.351, ss.308-310, 1995 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 351
  • Basım Tarihi: 1995
  • Doi Numarası: 10.1007/bf00321654
  • Dergi Adı: FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.308-310
  • Erciyes Üniversitesi Adresli: Evet

Özet

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%).