Microdroplet Sample Application in Electrothermal Atomization for Atomic Absorption Spectrometry

摘要

The application of liquid samples in the form of microdroplets, approximately 150 microns in diameter, to an electrothermal atomizer has been evaluated. This technique has been found to offer improved precision (1-2% RSD), microsampling capabilities, and simplified calibration using a single concentration standard. Examination of dried sample after deposition indicates reduced spreading and crystal size for microdroplet and aerosol deposition compared with manual micropipetting methods. Crystal size and deposit spreading were found to correlate with the degree of suppression of Pb signals by Cl(-) and of Au signals by sulfate. (Author)