Spark ionization

Spark ionization

Spark ionization (also known as spark source ionization()) is a method used to produce gas phase ions from a solid sample. The prepared solid sample is vaporized and partially ionized by an intermittent discharge or spark. [ [http://www.iupac.org/goldbook/S05780.pdf IUPAC gold book definition] ] This technique is primarily used in the field of mass spectrometry. When incorporated with a mass spectrometer the complete instrument is referred to as a spark ionization mass spectrometer or as a spark source mass spectrometer (SSMS). [cite journal | author = H. E. Beske, A. Hurrle and K. P. Jochum | title = Part I. Principles of spark source mass spectrometry (SSMS) | year = 1981 | journal = Fresenius' Journal of Analytical Chemistry | volume = 309 | issue = 4 | pages = 258–261 | doi = 10.1007/BF00488596]

Typically samples are physically incorporated into two conductive electrodes (usually either carbon or silver) between which a high-voltage arc is produced, ionizing the material at the tips of the electrodes. If metals are being analyzed the sample may serve as an electrode. Mass analyzers are typically Mattauch-Herzog geometry, and use either photosensitive plates for ion detection or linear channeltron detector arrays.

References


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Spark gap — A spark gap consists of an arrangement of two conducting electrodes separated by a gap usually filled with a gas such as air. When a suitable voltage is supplied, a spark forms, ionizing the gas and drastically reducing its electrical resistance …   Wikipedia

  • spark chamber — Physics. a device for detecting elementary particles, consisting of a series of charged plates separated by a gas so that the passage of a charged particle causes sparking between adjacent plates. [1960 65] * * * ▪ radiation detector… …   Universalium

  • Discharge ionization detector — A discharge ionization detector (DID) is a type of detector used in gas chromatography. Principle A DID is an ion detector which uses a high voltage electric discharge to produce ions. The spark ionizes helium atoms that are mixed with components …   Wikipedia

  • Ion source — An ion source is an electro magnetic device that is used to create charged particles. These are used primarily within mass spectrometers or particle accelerators.Mass spectrometry In mass spectrometry, an ion source is a piece of equipment used… …   Wikipedia

  • Mass spectrometry — (MS) is an analytical technique that measures the mass to charge ratio of charged particles.[1] It is used for determining masses of particles, for determining the elemental composition of a sample or molecule, and for elucidating the chemical… …   Wikipedia

  • History of mass spectrometry — The history of mass spectrometry dates back more than one hundred years and has its roots in physical and chemical studies regarding the nature of matter. The study of gas discharges in the mid 19th century led to the discovery of anode and… …   Wikipedia

  • mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …   Universalium

  • Corona discharge — The corona discharge around a high voltage coil …   Wikipedia

  • electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

  • oxidation–reduction reaction — ▪ chemical reaction Introduction also called  redox reaction        any chemical reaction in which the oxidation number of a participating chemical species changes. The term covers a large and diverse body of processes. Many oxidation– reduction… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”