Catalytic kinetic simultaneous determination of iron, silver and manganese with the Kalman filter by using flow injection analysis stopped-flow spectrophotometry

A catalytic differential kinetic method with Kalman filter for the simultaneous determination of multi-component is described. The oxidization of Rhodamine B (RE) by potassium periodate in a slightly acid solution is a slow reaction. But iron(III); silver(I) or manganese(II) has a differential catalytic effect on the oxidation reaction of RE in the presence of 1,10-phenanthroline as the activator. So iron, silver and manganese can be simultaneously determined by measuring the decreasing absorbance of the dye (RE) at 555 nm. A flow injection analysis slopped-flow spectrophotometric system with a microcomputer performs the determinations. This method has been applied to determining iron, silver and manganese of alloy samples with satisfactory results. (C) 1998 Elsevier Science B.V.