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• 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. 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 (eraser) 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 fast and easy to perform, and does not require any equipment not usually found in a chemistry laboratory. However, the range of detected elements is small, and 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 wikiPageRevisionID "603659253".
• Flame_test hasPhotoCollection Flame_test.
• Flame_test subject Category:Chemical_tests.
• Flame_test subject Category:Chemistry_classroom_experiments.
• Flame_test subject Category:Fire.
• Flame_test type Abstraction100002137.
• Flame_test type Act100030358.
• Flame_test type Activity100407535.
• Flame_test type ChemicalTests.
• Flame_test type ChemistryClassroomExperiments.
• Flame_test type Cognition100023271.
• Flame_test type Event100029378.
• Flame_test type Experiment100639556.
• Flame_test type Experiment105798043.
• Flame_test type HigherCognitiveProcess105770664.
• Flame_test type Inquiry105797597.
• Flame_test type Investigation100633864.
• Flame_test type ProblemSolving105796750.
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• Flame_test type Trial105799212.
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• Flame_test type YagoPermanentlyLocatedEntity.
• Flame_test comment "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.".
• Flame_test label "Atomaire-emissiespectrometrie".
• Flame_test label "Barwienie płomienia palnika".
• Flame_test label "Ensayo a la llama".
• Flame_test label "Flame test".
• Flame_test label "Flammenfärbung".
• Flame_test label "Saggio alla fiamma".
• Flame_test label "Test de flamme".
• Flame_test label "Teste da chama".
• Flame_test label "Огненный тест".
• Flame_test label "اختبار اللهب".
• Flame_test label "炎色反応".
• Flame_test label "焰色反应".
• Flame_test sameAs Flammenfärbung.
• Flame_test sameAs Ensayo_a_la_llama.
• Flame_test sameAs Test_de_flamme.
• Flame_test sameAs Saggio_alla_fiamma.
• Flame_test sameAs 炎色反応.
• Flame_test sameAs 불꽃_반응.
• Flame_test sameAs Atomaire-emissiespectrometrie.
• Flame_test sameAs Barwienie_płomienia_palnika.
• Flame_test sameAs Teste_da_chama.
• Flame_test sameAs m.05sb49.
• Flame_test sameAs Q898373.
• Flame_test sameAs Q898373.
• Flame_test sameAs Flame_test.
• Flame_test wasDerivedFrom Flame_test?oldid=603659253.
• Flame_test depiction Flame_test.jpg.
• Flame_test isPrimaryTopicOf Flame_test.