SULFATE PRECONCENTRATION BY ANION-EXCHANGE RESIN IN FLOW-INJECTION AND ITS TURBIDIMETRIC DETERMINATION IN WATER

A preconcentration procedure was established for sulphate determinatio n in rain waters at the mg/l level, employing a small column packed wi th the AG1-X8 (200-400 mesh) anionic resin inserted into a flow inject ion system. Sulphate determination was performed by using the turbidim etric method based on reaction with barium. For concentrations within 0.10 and 2.0 mgSO42-/l, a throughput of 50 determinations/hr was achie ved, and the relative standard deviation of results was better than 2% .