Determination of Thallium in Soil |
| |
Authors: | K. S. Patel N. Agarwal |
| |
Affiliation: | Department of Chemistry , Ravishankar University , Raipur, 492010, M.P., India |
| |
Abstract: | Abstract A new spectrophotometric method is described for the determination of thallium in soil by extraction of Tl(III) with a toluene solution of N,N′-diphenylbenzamidine after acidification with 0.2–4.0 M HCl, and reaction of the extract with Crystal violet in the presence of 0.01–0.8 M HCl. The value of molar absorptivity of Tl(III)-X-CV complex (where X = Cl or Br; CV = Crystal violet) in toluene is 7.00 × 104 1 mole?1 cm?1 at the absorption maximum of 610 nm. The detection limit of the method is 20 ng ml?1. The present method is free from interference of almost metal ions commonly associated with Tl. The method has been applied for analysis of the metal to soils. |
| |
Keywords: | Spectrophotometry extraction thallium(III) soils |
|
|