Determination of mercury in the presence of chloride by means of the ternary complex Hg(II)/xylenol orange/amberlite La-2 in non-aqueous media.
The system Hg(II)/Xylenol Orange/Amberlite LA-2 dissolved in 1:1 v v 3-methylbutan-1-ol/chloroform medium has been studied. A 3:2:2 complex is formed, which is suitable for analytical measurements at temperatures <18 degrees . This complex allows the determination of mercury in the range 0.19-5.5 ppm with a molar absorptivity of 2.12 x 10(4).mole(-1).cm(-1) at 600 nm and extraction pH of 7.4 (standard deviation 0.065 ppm). The proposed method has been applied to the determination of mercury in contaminated water with a high chloride content.
Peral-Fernández
J L
JL
Departamento de Química Analítica, Facultad de Ciencias Químicas de la Universidad Complutense de Madrid, Ciudad Universitaria, Madrid-3, Spain.
Izquierdo-Hornillos
R
R
Cabrera-Martín
A
A
Gallego-Andreu
R
R