II)LINE
SOURCES
1)Gas (Vapor) Discharge Lamps at low pressure
(i.e., few torr) – minimize collisional interaction so get line
spectrum
• - most
common are Hg and Na
• -
often used for λ calibration
• - Hg pen lamp
• - fluorescent lights are another
example
• - also used UV detectors for
HPLC
2)Hollow Cathode Lamps (HCL) – for AA
3)Electrodeless Discharge Lamps (EDL) - AA