||Evaluation of a microwave-induced plasma spectrometer : for trace analysis /
Seitz, William Rudolf,
||Environmental Protection Agency, Athens, Ga. Southeast Environmental Research Lab.
|| National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency,
||EPA-660/2-73-009; EPA-ROAP-16ADN-32; 06841
Microwave spectroscopy ;
Spectrochemical analysis ;
Trace elements ;
Water analysis ;
Atomic spectroscopy ;
Helium plasma ;
Water pollution detection ;
Microwave gas discharges
||Received from HQ
||Some EPA libraries have a fiche copy filed under the call number shown.
||iv, 19 pages ; 27 cm.
A low pressure microwave-induced plasma in helium was evaluated as an excitation source for spectrochemical analysis of trace metals in water. The sample was introduced by evaporating a 5-microliter drop of solution on a wire filament and atomizing the solids by the discharge of a capacitor through the filament. The height of the resulting pulse from the photo detector was automatically recorded. Repeatability was about 10% and detection limits were 1 to 25 pg for As, Cd, Hg, and Pb. Slopes of calibration curves depended strongly on matrix and filament effects and the maximum solids loading of the filament was about 5 micrograms.
Includes bibliographical references (pages 17-19).