2. Hollow Cathode Lamp for ASS
 Hollow cathode lamps are metal-vapor
discharge lamps specifically developed for atomic
absorption spectroscopy.
 The hollow cathode lamp consists of a glass cylinder
filled with an inert gas usually Argon or Neon at low
pressure.

3.  Hollow cathode lamps are primarily used in
instruments for atomic absorption
spectroscopy (AAS).

4.  Atomic absorption spectroscopy (AAS) is a
spectroanalytical procedure for the quantitative
determination of chemical elements employing the
absorption of optical radiation (light) by free atoms in
the gaseous state.

5.  In analytical chemistry the technique is used for
determining the concentration of a particular element
(the analyte) in a sample to be analyzed.
 AAS can be used to determine over 70 different
elements in solution or directly in solid samples
employed
in pharmacology, biophysics and toxicology research.

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