|
Proskurnin M. A., Kurzin M. A., Chernysh V. V.
Use of Dithizone for
the Spectrophotometric and Thermal-Lens Determination of Metals in the Flow
Abstract
The
conditions for spectrophotometric determination of a set of metals using
dithizone under batch conditions at the level of n ´ 10–7 mol/L were found; to decrease the blank signal, an
auxiliary oxidant (molecular iodine oxidizing unreacted dithizone) is used. To
expand the circle of determined metals, a system of reagents of dithizone and
zinc EDTA chelate is proposed. Based on these conditions, a variant of flow
spectrophotometric determination of transition metals with dithizone is
developed. A possibility of thermal-lens determination of the studied metals is
shown; the limits of detection are n ´ 10–9
mol/L.
Copyright (C) Chemistry Dept., Moscow State University, 2002
|
|
