ABSTRACT.
Colorimetric determination of sulphate in waters and water extractions of soils

Angélica Sadzawka R.1 y Nibaldo Apablaza R.2
 

In arder to increase the sensibility, a modification of colorimetric method for determining sulphate described by Dewis and Freitas is proposed. The modificated procedure makes it possible to determine concentrations of sulphate as low as 0.04 mM (1 mg/It of S).

Keywords:
1 Estación Experimental La Platina (INIA), Casilla 439, Correo 3, Santiago, Chile.
2 Facultad de Ciencias Químicas y Farmacéuticas, U. de Chile, Casilla 233, Correo 1, Santiago, Chile.