Studies in atomic-fluorescence spectroscopy-IV The atomic-fluorescence spectroscopic determination of selenium and tellurium.
Selenium and tellurium are determined down to 0.25 and 0.12 p pm respectively by measuring the atomic-fluorescence signals at 2040 A and 2143 A respectively. Other possible wavelengths of measurement are considered in detail and the effects of some extraneous ions are examined. Microwave-excited electrodeless discharge tubes are used as spectral sources and intensity measurements are made with a Unicam SP 900A atomic-absorption/flame-emission spectrophotometer. Atomic-absorption measurements are also made with the same sources and spectrophotometer. The advantages of atomic-fluorescence methods and the use of electrodeless discharge tubes are discussed.
Dagnall
R M
RM
Chemistry Department, Imperial College, London S.W. 7, England.
Thompson
K C
KC
West
T S
TS