PRECONCENTRATION OF TRACE AMOUNTS OF MANGANESE FROM NATURAL-WATERS BY MEANS OF A MACRORETICULAR POLY(DITHIOCARBAMATE) RESIN

A chelating poly(dithiocarbamate) resin (PDTC) with macroreticular support is characterized as effective collector for traces of manganese from natural waters. Using small PDTC columns preconcentration of manganese can be achieved even at high flow-rates (5-6 ml/min) and sample volumes (1500 ml). Accordingly. PDTC resin is used for the preconcentration of manganese from water samples prior to its determination by flame atomic-absorption spectrometry. A series of ions abundant in natural waters do not interfere. The sensitivity and detection limit were 2.5 and 0.5-mu-g/l., respectively. The relative standard deviations of the results for a manganese concentration of 40-400-mu-g/l. are in the range 1.1-6.2%. In mineral and tap waters analysed, the manganese concentration range was between 2.9 and 30.8-mu-g/l.