摘要: Abstract A new spectrophotometric method is described for the determination of thallium in soil by extraction Tl(III) with a toluene solution N,N′-diphenylbenzamidine after acidification 0.2–4.0 M HCl, and reaction extract Crystal violet presence 0.01–0.8 HCl. The value molar absorptivity Tl(III)-X-CV complex (where X = Cl or Br; CV violet) 7.00 × 104 1 mole−1 cm−1 at absorption maximum 610 nm. detection limit 20 ng ml−1. present free from interference almost metal ions commonly associated Tl. has been applied analysis to soils.
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