In qualitative chemical analysis, a test for the presence of metallic elements whose main spectral emission lines give characteristic colors in a Bunsen burner flame. A small amount of a salt of the metal is introduced into the flame by means of platinum wire first dipped in hydrochloric acid. Some metals and their colors are: lithium, red; sodium, yellow; potassium, lilac; strontium, crimson; barium, apple-green; copper, blue-green; lead and arsenic, blue.
For flame photometry see spectrophotometry.
Related category• ANALYTICAL CHEMISTRY
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