
	Where results make sense

Topic: Flame test

In the News (Wed 30 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Student Worksheet: The Flame Test
		When the platinum wire is clean, dip the wire in the test tube containing a 0.5M solution and hold it in the hottest part of the flame.
		Test all of the solutions and make sure that you record the color of the flame for each element on the Data Table.
		When the diffraction grating was used to view the flame, explain why different colorful emission lines were observed for the elements.
	imagine.gsfc.nasa.gov /docs/teachers/lessons/xray_spectra/student-worksheet-flame.html (578 words)

	Flame Test
		• To predict the identity of an unknown metal ion from a flame test.
		Therefore, a flame test is often used as a confirmatory test in identifying an unknown metal.
		Test it in the flame as you did with the known solutions.
	www.lopezlink.com /Labs/Flame_Test/flame_test.htm (1033 words)

	Test Leads \| Handheld Test Equipment - Electronic Measurement Instruments - Clamp-On Meters
		Standard test lead set with alligator clips (screw on) [More...
		UL Listed test lead set with alligator clips (screw on) [More...
		Fused test lead set with 5 extra fuses [More...
	www.tpi-store.com /category.php/test-leads/?category=449 (331 words)

	Flame Test Loop (Site not responding. Last check: 2007-10-29)
		A pair of plyers are used to hold the loop end and the wire and narrowed end of the glass tube are heated together in a hot torch flame until red heat.
		It is wise to anneal the glass in the cooler parts of the flame for a few moments, followed by slow cooling, in glass wool is ideal.
		Repeat with the reducing flame (inside the inner cone), often there is a difference which will help narrow down the possibilities.
	www.vk2zay.net /article.php/73 (440 words)

	Flame Test (Site not responding. Last check: 2007-10-29)
		Flame Test Theresa Fichera Frazier Elementary School 300 North State Street 4027 West Grenshaw Street Chicago, Illinois 60610 Chicago, Illinois 60624 (312) 321-8797 (312) 534-6880 Objectives: The student will 1.
		view the colors emitted by various metallic salts as they are put into a bunsen burner flame.
		Have students energize metallic salt solutions over a bunsen burner flame and note the color of each metal.
	www.iit.edu /~smile/ch9105.html (309 words)

	INDURA - Flame Resistance Defeined
		Flame resistance is the characteristic of a fabric that causes it not to burn in air.
		Flame resistance is often confused with flame retardant which is a term used to describe a chemical substance that imparts flame resistance of fabric.
		Test uses an enclosed cabinet in which 12-inch long specimens are suspended vertically over a controlled flame which is impinged on the bottom edge of the fabric for 12 seconds.
	www.frhamsafety.com /nuclear/coveralls/flame/indura/ultra.htm (330 words)

	Flame Summary
		Flame analysis is a qualitative test used to identify the components of a substance or mixture.
		Flames, or at least portions of them, are often plasma or an ionized gas, but in more general terms a flame is a region of exothermic chemical reaction of high enough temperature to emit visible light.
		Flame temperatures of common items include a blowlamp at 1,300°C, a candle at 1,400°C, or a much hotter oxyacetylene combustion at 3,000°C. Generally speaking, the coolest part of the flame will be red, transitioning to orange, yellow, and white as the temperature increases as a result of changes in flbody radiation.
	www.bookrags.com /Flame (2180 words)

	Houston Wire & Cable Company - Cable Flame Tests (Site not responding. Last check: 2007-10-29)
		To qualify, cables must have a flame spread of less than 5 feet beyond the end of the 4-1/2 foot ignition flame, a peak optical density of 0.5 maximum (33% light transmission) and a maximum average optical density of 0.15 (70% light transmission).
		In the UL VW-1 Flame Test, a tirrill burner (similar to a Bunsen burner) is used as the ignition source.
		The flame is then reapplied, either after 15 seconds or when the sample ceases to flame (whichever is longer), for a total of five 15-second applications.
	www.houwire.com /products/technical/cable_flame.html (767 words)

	flame. The Columbia Encyclopedia, Sixth Edition. 2001-05
		The simple flame occurring when a single gas, such as hydrogen, burns in another gas, such as air, shows two areas, or zones: an inner, cone-shaped area consisting of unburned gas; and an outer area in which the chemical reaction (the combination of hydrogen and oxygen to form water) is taking place.
		This reaction is illustrated in the flame of the oxyhydrogen blowpipe.
		Flames are colored by the introduction of various substances, a fact utilized in the flame test for the identification of certain metals.
	www.bartleby.com /65/fl/flame.html (351 words)

	American Antigravity - Flame and High-Voltage Corona Interactions
		The flame is drawn towards the collector when power is applied partially through an aerodynamic push from ions travelling from the emitter to the collector, but also because the flame is a mixture of combustion-gasses and gas-plasma that picks up and carries charges in the air-gap to the collector.
		In essence, the flame serves as a charge-transport mechanism across the air-gap, and as such it picks up ions from the surrounding air in the corona and delivers them to the collector.
		It may also be that arcing was limited to the number of ions in the flame's plasma, which would be a limiting factor as to the volume of current that could be delivered in each arcing event.
	www.americanantigravity.com /flametest.html (685 words)

	Mine Safety and Health Administration (MSHA) - Code of Federal Regulations - 30 CFR 18.65
		The longitudinal axis shall be horizontal and the transverse axis inclined at 45° to the horizontal.
		At the end of 1 minute the burner flame shall be removed, the ventilating fan turned on to give an air current having a velocity of 300 feet per minute, and the duration of flame measured.
		After the test specimen ceases to flame, it shall remain in the air current for at least 3 minutes to determine the presence and duration of afterglow.
	www.msha.gov /30CFR/18.65.htm (611 words)

	How to Do Flame Tests - Qualitative Analysis of Metal Salts
		The flame test is one of the techniques used by chemists to perform a qualitative analysis of a sample.
		The flame test is used to visually determine the identity of an unknown metal of an ionic salt based on the characteristic color the salt turns the flame of a bunsen burner.
		The value of the flame test is limited by interference from contaminants that produce brighter colors and by ambiguities where certain different metals cause the same flame color.
	chemistry.allinfoabout.com /features/flametest.html (330 words)

	flame tests
		Flame tests are used to identify the presence of a relatively small number of metal ions in a compound.
		If the flame colour is weak, it is often worthwhile to dip the wire back in the acid again and put it back into the flame as if you were cleaning it.
		Flame colours are produced from the movement of the electrons in the metal ions present in the compounds.
	www.chemguide.co.uk /inorganic/group1/flametests.html (773 words)

	AllRefer.com - flame test (Chemistry) - Encyclopedia
		flame test, test used in the identification of certain metals.
		When a salt of the metal is introduced into a Bunsen burner flame, the metallic ion produces characteristic color in the flame.
		The value of this simple flame test is limited by interferences (e.g., the barium flame masks calcium, lithium, or strontium) and by ambiguities (e.g., rubidium and cesium produce the same color as potassium).
	reference.allrefer.com /encyclopedia/F/flametes.html (250 words)

	Kemgard \| Resource Center \| Test Methods \| UL-94 Horizontal/Vertical Flame Test
		One flame standard often encountered in the plastics industry is the UL-94 test.
		Often used for classifying wire insulation and other electronic components, the UL test provides a preliminary indication of a material's acceptability for use as part of a device or appliance with respect to its flammability.
		The flame is applied for two 10 second intervals separated by the time it takes for flaming combustion to cease after the first application.
	www.kemgard.com /resource_center/test_methods/UL_94_Flame_Test.cfm (266 words)

	Cedar Plus
		Test procedures to determine the fire resistance of roof coverings were originally developed by Underwriters Laboratories prior to 1920.
		The roofing materials are exposed to intermittent gas flames of 1,300°F to 1,400°F at 12 miles per hour wind is applied to the test deck until the test is completed.
		The wind applied to the test deck is increased to 18 miles per hour during this test.
	www.cedarplus.com /products/cedarplus/testing.html (507 words)

	UL \| Plastics - UL 94 flammability testing
		There are 12 flame classifications specified in UL 94 that are assigned to materials based on the results of these small-scale flame tests.
		A HB flame rating indicates that the material was tested in a horizontal position and found to burn at a rate less than a specified maximum.
		The test is somewhat similar to the HWI test in that it measures a material's resistance to ignition on application of a heated non-flaming source.
	www.ul.com /plastics/flame.html (953 words)

	DuPont Personal Protection NOMEX® Thermal Testing information for industrial products
		Fabrics are tested with a space gap (1/4”) between the test sample and the heat sensor to measure the fabrics' ability to provide a barrier between the heat source and the skin ("spaced TPP").
		This test is identical to the TPP test, with the exception that the heat source is 100% radiant heat.
		Tests are usually conducted at heat energies of 1.8- 2 cal/cm2sec, and for durations of 2.5 to 5.0 seconds for single layer garments.
	www2.dupont.com /Personal_Protection/en_US/tech_info/nomex_industrial_thermaltesting.html (1382 words)

	flame test - HighBeam Encyclopedia
		Flame Seal's FX-100 Fire Barrier Coating was Used by ADtrans/DaimlerChrysler Rail Systems in Pittsburgh to Pass Official Flame Tests for Plastic Seats Used in Mass Transit Systems.
		Flame Seal's Breakthrough UL94V-0 Test On Plastics, With Its FX-100 Fire Barrier Coating, is Gaining Widespread Industry Recognition, as Well as Growing Media Coverage.
		Flame tests performed safely: a safe and effective alternative to the traditional flame test.
	www.encyclopedia.com /doc/1E1-flametes.html (631 words)

	UL Flame Rating - UL94
		A flame is applied to the end of the specimen for 30 seconds or until the flame reaches the 1 inch mark.
		The flame is applied for ten seconds and then removed until flaming stops at which time the flame is reapplied for another ten seconds and then removed.
		This test is used for materials that are thin, or are too flexible or may distort, shrink or flex during ordinary vertical testing.
	www.ides.com /property_descriptions/UL94.asp (1055 words)

	DuPont Personal Protection CEN physical test methods
		A much more realistic test of the physical properties of a garment is the Trapezoidal Tear test where the resistance to tear upon puncture from a nail or bolt type object is determined and the direction of the puncture is irrelevant.
		The test material is passed through a flame of a bunsen burner at a steady speed.
		A test specimen is cut no bigger than the dimensions of the base plate and no smaller than dimensions of the electrodes of the ohmmeter.
	www2.dupont.com /Personal_Protection/en_US/tech_info/cen_physical.html (876 words)

	Amazing Rust.com - Flame Test (Site not responding. Last check: 2007-10-29)
		A flame test is a procedure used to test qualitatively for the presence of certain metals in chemical compounds.
		This technique of using certain chemical compounds to color flames is widely used in pyrotechnics to produce the range of colors seen in a firework display.
		To perform a flame test, prepare a solution of the compound to be tested by dissolving it in
	www.amazingrust.com /Experiments/how_to/Flame_Test.html (663 words)

	CR Scientific: Helpful Articles: Mineralogy Experiments: Barium and Barite
		If so, turn off the flame and see whether any coating developed on the carbon block (2 or 3 cm away from the mineral fragment), and note the color of this coating while it's still hot.
		Test it in the burner flame and note what color, if any, is imparted to the flame.
		A sample the author tested, which was thought to be barite, didn't give the greenish flame test during step 3; in fact, it colored the flame yellow with a touch of red (yellow from sodium, red probably from calcium
	www.crscientific.com /barite-test.html (1993 words)

	Vertical Cable Tray Flame Tests
		These tests were developed to assess fire propagation characteristics of a group of cables for use in commercial, "non-combustible" buildings, industrial plants, nuclear plants, etc. The criteria for acceptance of course, differs with jurisdiction.
		Flame impingement on the cable front is also questionable – the hotter portion of the test flame does not always impinge on the cables, and is cable diameter dependent.
		UL has adopted this test in 1685 and on June 14, 1993 announced that manufacturers who have listings may choose to include it in their follow-up services, and the cables may be so marked.
	www.nexansenergy.com /egy/tecdoc/9.htm (851 words)

	Flameproofing
		A copy of the certificate of flame resistance may be left in the booth when the vendor does not occupy it.
		A signed and dated business card or a Seattle Fire Department (SFD) Flame Test Record issued to the vendor after a successful flame test by a representative of the Seattle Fire Marshal’s Office may be left in plain sight by the vendor when the booth is unoccupied.
		The business card or SFD test record must state what fabric/product was tested or have a sample of the fabric/product that was tested affixed to it.
	www.seattle.gov /fire/FMO/specialEvents/SEFlameProofingInfo.htm (608 words)

	Flame tests
		A flame test is a simple qualitative test that can indicate the presence of certain metal ions.
		To remove any previous metals, light a Bunsen burner and heat a flame test wire in the flame until there is no color to the flame.
		Dip your flame test wire in the sample solutions containing the metal ion, and immediately place the wire in the flame.
	icn2.umeche.maine.edu /genchemlabs/flametests.html (1229 words)

	Mg Flame Test
		In order to have a positive flame test, the test element must be present in the flame, which means that the compound containing the element must vaporize to some extent at the flame temperature.
		So platinum, tungsten, or other refractory materials do not give a positive flame test because their volatility is so small at the temperature of ordinary gas/air flames that there is none of the element present to give a positive test.
		The flame color produced in a flame test results from the emission of VISIBLE light when an electron in an excited electronic state of the species drops to an electronic state of lower energy emitting a photon corresponding to the energy difference of the two electronic states.
	www.newton.dep.anl.gov /askasci/chem00/chem00694.htm (309 words)

	Forced Flow Flame Spreading Test (FFFT) (Site not responding. Last check: 2007-10-29)
		The objectives of the FFFT experiment are to identify the effect of low-speed flow and bulk fuel temperature on the flammability, ignition, flame growth, and flame spreading behavior of solid fuels in a micro-g environment.
		The test modules are metallic ducts with an inlet section, where air velocity measurements are made, and an outlet section where the fan that moves the air is located.
		The test section in the middle is isolated from the inlet and outlet sections by small mesh screens that condition the air flow, absorb the heat of the flame, and prevent the escape of any particulates (like soot) created during the burning.
	zeta.lerc.nasa.gov /expr2/ffft-1.htm (1213 words)

Try your search on: Qwika (all wikis)