Applicability of hydrated iron(III) oxide and dithiocarbamates as colloid collectors for flotation preconcentration of manganese in traces before itsETAAS determination

The applicability of tetramethylenedithiocarbarnate (TMDTC-) and hexamethyl enedithiocarbamate (HMDTC-) for colloid flotation separation of manganese i n traces from fresh (spring, well and tap) water was studied. The experimen tal conditions for the successful manganese separation and preconcentration before electrothermal atomic absorption spectrometric (ETAAS) determinatio n were optimised, Higher enrichment of manganese was achieved when a larger amount of HMDTC- is used, Applying iron(III) hexamethylenedithiocarbamate, Fe(HMDTC)(3), as a precipitate collector, manganese was determined at mug/ L levels singly or simultaneously with lead and zinc in 1 L of water sample . The applicability of the proposed procedure have been verified by analyse s of fresh water samples using the method of standard addition, as well as by comparing the results obtained by ETAAS with those obtained by inductive ly coupled plasma-atomic emission spectrometry (ICP-AES). The detection lim it of manganese using this method is 0.025 mug/L.