1CHEMISRTY 423 Flame Atomic Absorption Spectroscopy Laboratory Project Spring 2008 The atomic spectroscopy mini-project is an open-ended guided-inquiry laboratory exercise. Your approach should be to read through the reference material (cited below and attached), develop a plan-of-action to meet the stated objectives in the most efficient manner possible, perform the experiments, take notes and ask questions. Your group will develop and optimize a method for the preconcentration and quantitation of heavy metals in water samples using a membrane disk and flame atomic absorption spectroscopy. Materials: 1.Choose three metals, from the following list, as the subjects for this set of experiments: Cd2+, Co2+, Cu2+, Ni2+, Pb2+, Zn2+. 2.Complexing ligand: sodium diethyldithiocarbamate (Na-DDTC). 3.Membrane disk: Supelco 47-mm ENVI-DISK, catalog number 57171. 4.Vacuum pump and supporting chemicals and glassware. 5.Varian SpectrAA 220FS instrument.
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