SIMULTANEOUS FLOW-INJECTION ANALYSIS FOR 2 COMPONENTS WITH A DOUBLE ONLINE DIALYZER - DETERMINATION OF CALCIUM AND CHLORIDE IN INDUSTRIAL EFFLUENT WATER

An on-line double membrane dialyser was designed and incorporated into the manifold of a flow injection system for the simultaneous determination of more than one component in a single sample injection. A fast and reliable fully automated two-component flow injection procedure is described in which a single sample (50 mul of industrial effluent water) is injected into a carrier stream and simultaneously dialysed for the determination of chloride and calcium. The results obtained for the chloride and calcium in industrial effluent water at a sampling rate of 90 per hour compared well with those obtained by standard methods.