Applications of the zeeman effect to analytical atomic spectroscopy-V use of commercial hollow-cathode lamps.
The feasibility of using radiofrequency-excited commercial hollow-cathode lamps as Zeeman-modulated sources is examined. A supply frequency of 2.5 Mhz is found to be generally suitable. At this frequency the d.c. and Rf zero magnetic field lamp characteristics remain similar, and satisfactory magnetic stability is obtained. Suitable choice of magnetic field strength is found to give partial discrimination between analyte atomic-absorption and self-absorption within the lamp for emission lines showing an anomalous multiples.
Murphy
G F
GF
Trace Analysis Research Centre, Department of Chemistry, Dalhousie University, Halifax, N.S., Canada.
Stephens
R
R