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The Engineering Toolbar
The Ultimate Resource for Engineering and Technical Research. (Learn More) |
Spark or Arc Excitation
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Spark and arc excitation sources use a current pulse (spark) or a continuous electrical discharge (arc) between two electrodes to vaporize and excite analyte atoms. The electrodes are either metal or graphite. If the sample to be analyzed is a metal, it can be used as one electrode. Non-conducting samples are ground with graphite powder and placed into a cup-shaped lower electrode. Arc and spark sources can be used to excite atoms for atomic-emission spectroscopy or to ionize atoms for mass spectrometry. Arc and spark excitation sources have been replaced in many applications with plasma or laser sources, but are still widely used in the metals industry. Products & Services
Atomic emission and optical emission spectrometers determine analyte concentration via a quantitative measurement of the optical emission from excited atoms.
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Learn more about Atomic Emission and Optical Emission Spectrometers
EDM electrode materials and components consist of highly conductivity and/or arc erosion resistant materials such as graphite, copper or copper graphite.
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Learn more about EDM Electrode Materials
Electrical contacts and contact materials are soft, high-conductivity, oxidation- resistant materials that are used in circuit breakers, relays, switches, and electrical discharge machining (EDM) applications. They often have a second phase in order to provide anti-welding and/or arc resistance.
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Learn more about Electrical Contacts and Contact Materials
EDM tooling, electrodes, fixtures, materials, guides and other supplies are used in electrical discharge machining (EDM), a highly-accurate manufacturing process for creating shapes within components and assemblies.
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Learn more about EDM Tooling
Gas chromatography detectors (GC detectors) identify solutes as they exit the chromatographic column. A chromatogram is generated plotting the signal versus time.
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Learn more about GC Detectors
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Topics of Interest
Inductively coupled plasma (ICP) is a very high temperature (7000° - 8000° K) excitation source that efficiently desolvates, vaporizes, excites, and ionizes atoms. Molecular interferences are greatly...
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Direct-current plasma (DCP) is an excitation source for atomic emission and optical emission spectrometers. DCP is created by an electrical discharge between two electrodes. A plasma support gas is...
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An overview of further details of an electric arc in a gas is presented
here. Although not essential, it is of value to the electronic ballast circuit
designer in making some design decisions.
The...
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Different techniques have evolved for trace metal analysis of polymers. Generally speaking, the techniques come under two broad headings:
Destructive techniques: these are techniques in which...
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Overview
Different techniques have evolved for trace metal analysis of polymers. Generally speaking, the techniques come under two broad headings:
Destructive techniques: these are techniques...
(Read More)
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