Discussion
Electrode less Discharge Lamp (EDL) is used in
Answer: A
The electrodeless discharge lamp is used in the atomic absorption spectrometer, option A. In atomic absorption the light source must emit the narrow line spectrum of the element being measured, and the hollow cathode lamp does this for most elements, but for volatile elements such as arsenic, selenium and antimony an electrodeless discharge lamp gives a more intense output. Atomic emission (B), infra-red (C) and X-ray fluorescence (D) instruments use other sources, such as a plasma, a heated source or an X-ray tube.
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