Photron lamps have been tested and found to work as well as lamps sold specifically for this technique, however due to the high energy pulse used, some elements will be consumed at a higher rate reducing lamp life.Īll lamp windows have been upgraded to Quartz for maximum transmission of the spectral line.Īrgon, Helium, Xenon or Krypton gas fills are available upon request. In this technique, as the light source lamp with the hollow cathode made of a suitable element is usually used. Cathode materials and geometry achieve a combination of spectral purity and a suitable sputtering rate.Ī high sputtering rate will give high intensity at the expense of lamp life, sensitivity and linearity.Noise free operation, long running life and a 5 year shelf life. For every test, a different light source (hollow-cathode lamp) is used. ![]() It is imposed with a 10mA current such that when the metal is excited electrically, characteristic spectral line/lines are emitted and passed directionally through a glass UV/VIS window of the lamp. Rapid warm up to produce stable long term light emission. The Hollow cathode Lamp is made with an element (metal) as the cathode encased in a bulb with a low pressure inert gas. line source of radiation most frequently employed in AAS is the hollow-cathode lamp (HCL)-see Figure 4 for a schematic rendering.Minimal spectral interference from continuum emission, present in the cathode.Narrow line width, for maximum sensitivity and linearity.Intense emission of resonance (ground state derived) lines. Single vs Double Beam Configurations In a single-beam atomic absorption instrument the light source (hollow cathode lamp or electrodeless discharge lamp). ![]() Hollow cathode lamps produced by Photron are designed and manufactured to achieve all of the following fundamental requirements for a spectral line source
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