SEQUENTIAL DETERMINATION OF NICKEL AND COPPER IN WASTE-WATERS BY REVERSED FLOW-INJECTION SPECTROPHOTOMETRY

A new system using reversed flow injection analysis (rFIA) is describe d for the sequential determination of nickel and copper in waste water s. The insertion of two valves with different functions along the FIA manifold allows a simple, fast, and versatile photometric determinatio n of pollutants using a single configuration. The results found by the proposed method are in good agreement as conventional methods, the se nsitivity is greater than that of the normal technique, and the sampli ng frequency is 60 h(-1). These features made this scheme suitable for monitoring polluting species in waste waters. (C) 1995 Academic Press , Inc.