Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Flame_test> ?p ?o }
- Flame_test abstract "A flame test is an analytic procedure used in chemistry to detect the presence of certain elements, primarily metal ions, based on each element's characteristic emission spectrum. The color of flames in general also depends on temperature; see flame color.The test involves introducing a sample of the element or compound to a hot, non-luminous flame, and observing the color of the flame that results. The idea of the test is that sample atoms evaporate and since they are hot, they emit light when being in flame. Bulk sample emits light too, but its light is not good for analysis. Bulk sample emits light primarily due to motion of the atoms, therefore its spectrum is broad, consisting of a broad range of colors. Separate atoms of sample present in flame can emit only due to electronic transitions between different atomic energy levels. Those transitions emit light of very specific frequencies, characteristic of chemical element itself. Therefore, the flame gets the color, which is primarily determined by properties of the chemical element of the substance being put into flame. The flame test is a relatively easy experiment to set up, and thus is often demonstrated or carried out in science classes in schools.Samples are usually held on a platinum wire cleaned repeatedly with hydrochloric acid to remove traces of previous analytes. The compound is usually made into a paste with concentrated hydrochloric acid, as metal halides, being volatile, give better results. Different flames should be tried to avoid wrong data due to \"contaminated\" flames, or occasionally to verify the accuracy of the color. In high-school chemistry courses, wooden splints are sometimes used, mostly because solutions can be dried onto them, and they are inexpensive. Nichrome wire is also sometimes used. When using a splint, one must be careful to wave the splint through the flame rather than holding it in the flame for extended periods, to avoid setting the splint itself on fire. The use of cotton swab or melamine foam (used in \"eraser\" cleaning sponges) as a support have also been suggested. Sodium is a common component or contaminant in many compounds and its spectrum tends to dominate over others. The test flame is often viewed through cobalt blue glass to filter out the yellow of sodium and allow for easier viewing of other metal ions.The flame test is relatively quick and simple to perform, and can be carried out with the basic equipment found in most chemistry laboratories. However, the range of elements positively detectable under these conditions is small, as the test relies on the subjective experience of the experimenter rather than any objective measurements. The test has difficulty detecting small concentrations of some elements, while too strong a result may be produced for certain others, which tends to cause fainter colors to not appear.Although the flame test only gives qualitative information, not quantitative data about the proportion of elements in the sample, quantitative data can be obtained by the related techniques of flame photometry or flame emission spectroscopy. Flame Atomic absorption spectroscopy Instruments, made by e.g. PerkinElmer or Shimadzu, can be operated in emission mode according to the instrument manuals.".
- Flame_test thumbnail Flame_test.jpg?width=300.
- Flame_test wikiPageExternalLink FlameTest.shtml.
- Flame_test wikiPageExternalLink Flame_Test.html.
- Flame_test wikiPageID "1740015".
- Flame_test wikiPageLength "9187".
- Flame_test wikiPageOutDegree "110".
- Flame_test wikiPageRevisionID "708451011".
- Flame_test wikiPageWikiLink Aluminium.
- Flame_test wikiPageWikiLink Antimony.
- Flame_test wikiPageWikiLink Arsenic.
- Flame_test wikiPageWikiLink Atomic_absorption_spectroscopy.
- Flame_test wikiPageWikiLink Azure_(color).
- Flame_test wikiPageWikiLink Barium.
- Flame_test wikiPageWikiLink Beryllium.
- Flame_test wikiPageWikiLink Bismuth.
- Flame_test wikiPageWikiLink Blue.
- Flame_test wikiPageWikiLink Blue-green.
- Flame_test wikiPageWikiLink Boron.
- Flame_test wikiPageWikiLink Cadmium.
- Flame_test wikiPageWikiLink Caesium.
- Flame_test wikiPageWikiLink Calcium.
- Flame_test wikiPageWikiLink Carmine_(color).
- Flame_test wikiPageWikiLink Category:Chemical_tests.
- Flame_test wikiPageWikiLink Category:Chemistry_classroom_experiments.
- Flame_test wikiPageWikiLink Category:Fire.
- Flame_test wikiPageWikiLink Cerium.
- Flame_test wikiPageWikiLink Chemical_element.
- Flame_test wikiPageWikiLink Chemistry.
- Flame_test wikiPageWikiLink Chromium.
- Flame_test wikiPageWikiLink Cobalt.
- Flame_test wikiPageWikiLink Cobalt_glass.
- Flame_test wikiPageWikiLink Colored_fire.
- Flame_test wikiPageWikiLink Contamination.
- Flame_test wikiPageWikiLink Copper.
- Flame_test wikiPageWikiLink Cotton_swab.
- Flame_test wikiPageWikiLink Emission_spectrum.
- Flame_test wikiPageWikiLink Flame.
- Flame_test wikiPageWikiLink Germanium.
- Flame_test wikiPageWikiLink Gold.
- Flame_test wikiPageWikiLink Gold_(color).
- Flame_test wikiPageWikiLink Hafnium.
- Flame_test wikiPageWikiLink Halide.
- Flame_test wikiPageWikiLink Hydrochloric_acid.
- Flame_test wikiPageWikiLink Indium.
- Flame_test wikiPageWikiLink Ion.
- Flame_test wikiPageWikiLink Iron.
- Flame_test wikiPageWikiLink Lead.
- Flame_test wikiPageWikiLink Level_of_measurement.
- Flame_test wikiPageWikiLink Lilac_(color).
- Flame_test wikiPageWikiLink Lithium.
- Flame_test wikiPageWikiLink Magnesium.
- Flame_test wikiPageWikiLink Manganese.
- Flame_test wikiPageWikiLink Melamine_foam.
- Flame_test wikiPageWikiLink Mercury_(element).
- Flame_test wikiPageWikiLink Metal.
- Flame_test wikiPageWikiLink Molybdenum.
- Flame_test wikiPageWikiLink Nichrome.
- Flame_test wikiPageWikiLink Nickel.
- Flame_test wikiPageWikiLink Niobium.
- Flame_test wikiPageWikiLink Orange_(colour).
- Flame_test wikiPageWikiLink Palladium.
- Flame_test wikiPageWikiLink Phosphorus.
- Flame_test wikiPageWikiLink Photoelectric_flame_photometer.
- Flame_test wikiPageWikiLink Platinum.
- Flame_test wikiPageWikiLink Potassium.
- Flame_test wikiPageWikiLink Qualitative_inorganic_analysis.
- Flame_test wikiPageWikiLink Qualitative_property.
- Flame_test wikiPageWikiLink Radium.
- Flame_test wikiPageWikiLink Rubidium.
- Flame_test wikiPageWikiLink Scandium.
- Flame_test wikiPageWikiLink Selenium.
- Flame_test wikiPageWikiLink Shades_of_green.
- Flame_test wikiPageWikiLink Silver.
- Flame_test wikiPageWikiLink Silver_(color).
- Flame_test wikiPageWikiLink Sodium.
- Flame_test wikiPageWikiLink Splint_(laboratory_equipment).
- Flame_test wikiPageWikiLink Strontium.
- Flame_test wikiPageWikiLink Subjectivity.
- Flame_test wikiPageWikiLink Tantalum.
- Flame_test wikiPageWikiLink Tellurium.
- Flame_test wikiPageWikiLink Thallium.
- Flame_test wikiPageWikiLink Tin.
- Flame_test wikiPageWikiLink Titanium.
- Flame_test wikiPageWikiLink Tungsten.
- Flame_test wikiPageWikiLink Turquoise.
- Flame_test wikiPageWikiLink Vanadium.
- Flame_test wikiPageWikiLink Violet_(color).
- Flame_test wikiPageWikiLink White.
- Flame_test wikiPageWikiLink Yttrium.
- Flame_test wikiPageWikiLink Zinc.
- Flame_test wikiPageWikiLink Zirconium.
- Flame_test wikiPageWikiLink File:Bunsen_burner_flame_types.jpg.
- Flame_test wikiPageWikiLink File:Die_Flammenfärbung_des_Rubidium.jpg.
- Flame_test wikiPageWikiLink File:Flame_test.jpg.
- Flame_test wikiPageWikiLink File:Flametest--.swn.jpg.
- Flame_test wikiPageWikiLink File:Flametest--Cu.swn.jpg.
- Flame_test wikiPageWikiLink File:Flametest--Na.swn.jpg.
- Flame_test wikiPageWikiLink File:FlammenfärbungAs.jpg.
- Flame_test wikiPageWikiLink File:FlammenfärbungB.png.