Difference between revisions of "Flame test"
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Revision as of 04:06, 14 June 2015
A flame test is an analytical procedure that can determine the presence of certain elements.
Contents
Procedure
A flame test is carried out by placing a sample on a clean wire (commonly made out of platinum or nichrome), and placing it in a hot non-luminous flame (one that does not exhibit black-body radiation).
Flame Coloration Chart (From CRC Handbook of Chemistry and Physics)
Violet
Potassium (masked easily)
Azure
Copper halides
Light blue
Arsenic, selenium, cesium, lead
Emerald
Copper non-halides
Ytterbium metal powder
Pure green
Boron, tellurium, thallium
Yellowish-green
Barium
Bluish-green
Phosphates with sulfuric acid
Whitish-green
Zinc metal
Feeble green
Antimony, ammonium
Yellow
Sodium (masks everything, invisible through blue glass)
Orange
Calcium (greenish through blue glass, green through green glass, masked by barium)
Scarlet
Strontium (violet through blue glass, yellowish through green glass, masked by barium)
Carmine
Lithium (violet through blue glass, invisible through green glass, masked by barium)
Pink
Samarium metal
