Determination of Cadmiun In Environmental Samples by Graphite Furnace Atomic Absorption Spectrometry with Cloud Point Extraction
A method for the determination of Cd in environmental samples by graphite furnace atomic absorption spectrometry with cloud point extraction was established.The optimum extract conditions were pH 8-9,100 mg/L of 8-Oxine,10%(v/v) of Triton X-100 and heating at 80°C for 20 min.It is found that under optimal conditions,the established method could achieve a detection limit of 2.5 ng/L,with a preconcentration factor of 17;while the recovery test results of 94.6%-106.2% and the satisfactory analytical results for standard reference materials analysis indicated the accuracy of the method.For practical application,two water samples were analyzed with the established method.