Determination of Copper and Lead in Actibated Sludges by Microwave Digestion Platform Graphite Furnace Atomic Absorption

Copper and lead in activated sludges were determined successfully by platform graphite furnace atomic absorption spectrometry, digest sample by microwave-heating in a tightly closed PTEF vessel. Under the experiment condition, RSD of copper was in the range of 1.0%～2.0%, recoveries 95.6%～98.3%, and detection limit 0.005 2 ng/g. RSD of lead was in the range of 2.0%～2.9%,recoveries 92.3%～97%, and detection limit 0.007 3 ng/g. The feasibility of this method was proved by the satisfactory results obtained in the analyses of three sludge samples.