Sulphate preconcentration by anion exchange resin in flow injection and its turbidimetric determination in water.
A preconcentration procedure was established for sulphate determination in rain waters at the mg/l level, employing a small column packed with the AG1-X8 (200-400 mesh) anionic resin inserted into a flow injection system. Sulphate determination was performed by using the turbidimetric method based on reaction with barium. For concentrations within 0.10 and 2.0 MgSO(2-)(4)/l, a throughput of 50 determinations/hr was achieved, and the relative standard deviation of results was better than 2%.
Santos Filha
M M
MM
Departmento de Química, Universidade Federal de Sergipe, 49000 Aracajú SE, Brazil.
Reis
B F
BF
Krug
F J
FJ
Collins
C H
CH
Baccan
N
N