![]() The production of free particles and their excitation through the use of high temperature furnaces or combustion flames is a purely thermal phenomenon. A collection of references to works on low pressure glow discharges, containing 690 entries, concludes this work. The paper will conclude with a discussion of possible future developments of low pressure glow discharges. The use of these discharges will be illustrated with examples taken from the literature and from the measurements performed at NBS. The techniques used for the introduction of various conductive and nonconductive materials into the discharge will be discussed. ![]() A description of the hollow cathode developed at the National Bureau of Standards (NBS) will follow. These will he followed by a description of the conventional instrumentation developed for analytical purposes using the hollow cathode and flat discharge. Some of the fundamental properties of the glow discharge and sputtering phenomena will be discussed, including the relation between the geometry of the discharge, and the nature and pressure of sustaining gas, and current, on the emission characteristics of the discharges. ![]() The analytical sample is supplied to the discharge through a sputtering mechanism which provides a stable and non-selective source of particles. Both discharges have similar voltage-current characteristics which are responsible for their radiation stability. ![]() Not included are any expedited or LTL shipments or dIrect shipped items from Spectrum vendors or manufacturers which are charged at published carrier rates.The low pressure glow discharges considered in this paper are the hollow cathode (Paschen), and the flat cathode (Grimm). There are some additional charges that are item specific. offers a flat fee shipping when items are shipped “directly from Spectrum warehouses” by regular UPS ground within the contiguous United States. (View landing page for Print/Download version of this information.) Please read our MaIMPORTANT UPDATE and ApIMPORTANT UPDATE about receiving shipments during coronavirus-related crisis. Image(s) are representative of the product group and not necessarily the individual product. Note: Lumina Hollow Cathode Lamps may also be used with all earlier AA spectrometers that do not have automatic code reading capability by using an appropriate adapter cable. The larger the lamp, the greater the inert gas volume - and the longer the lamp lifetime. To prolong the life of a Lumina Hollow Cathode Lamp (HCL), we produce lamps with larger internal volume so that a greater supply of fill gas at optimum pressure is available. We offer a wide range of single-element and multi-element HCLs, which are ideal for determining most elements by atomic absorption spectroscopy. Every genuine PerkinElmer lamp is designed for use with and tested on PerkinElmer ® spectrometers to assure compatibility and the highest performance. Single Element Lumina Hollow Cathode Lamp (HCL) for the detection of elemental Lithium (Li). (50 mm) diameter single-element lamps are designed to be used with PerkinElmer ® PinAAcle and AAnalyst Atomic Absorption spectrometer series of instruments. Lab Nucleic Acid Purification Equipment.Lab Centrifuges- Stirrers- Shakers and Vortexers.Laboratory Meters and Testing Equipment.
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