B.1 Instrumentation The hollow cathode lamp: The most important aspect of AAS instrumentation is the light source, the most common of which is the hollow cathode lamp (HCL). Please visit our Product Page for Hollow Cathode Lamp to know more. Atomic Spectrometry Vahid Majidi, in Encyclopedia of Physical Science and Technology (Third Edition), 2003 IV. Various benefits of Hollow Cathode Lamps makes it ideal for usage in AAS. Heraeus’ lamps are also compatible with all major Atomic Absorption Spectrophotometry including: Can be used for almost any AA instrument.Clear signals and low distortion due to special cathode technology.Variety of single- and multi-element coded / non-coded in low and high-current, 37 mm and 50 mm lamps.Low Noise & hence better spectral responseĪs we are into supply of Hollow Cathode Lamps manufactured by Heraeus, some of the benefits of choosing Heraeus made HCLs are,.Better Lifetime compared to other lamps.The excited atoms of the inert gas and cathode are used for detection and to measure the spectrum while testing. Due to creation of plasma from the inert gas, sputtering of atoms from the cathode takes place as inert gas ions get bombarded on the cathode. from publication: Micro-arcing in radio frequency plasmas Micro-arcing. When Voltage gets passed through the anode, the inert gas gets ionized. Download scientific diagram A schematic diagram of the RF hollow cathode plasma apparatus used in the micro-arcing study. Atomic Absorption proved to be a challenge as the Hollow Cathode Lamp specifically for Pd. Typical Hollow Cathode Lamp SetupĪn HCL is formed of a Glass Tube that contains an anode, a cathode and inert gas. Figure 3: Schematic diagram of a UV-Visible Spectrophotometer. Apart from HCLs, Hollow Cathode Effect gets used in neon signages as well. Basically Hollow Cathode Effect is electrical conduction at lower voltage. Hollow Cathode Effect was first observed in 1916 by Friedrich Paschen, a German physicist, known for his work on electrical discharges. Hollow Cathode Lamps working totally depends on the hollow cathode effect. Hollow Cathode Lamps are ideal source of spectral lines that are used for testing in laboratories. The idea of this blog post is to cover working aspect of Hollow Cathode Lamps followed by its various advantages that fulfills Hollow Cathode Lamps’ usage in AAS.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |