a spectrum formed from the light produced by an electric spark, characteristic of the gas or vapor through which the spark passes.
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How to use spark spectrum in a sentence
The salts have a faint pink colour, and show a faint absorption spectrum; the spark spectrum is brilliant and well characterized.
Gallium is best detected by means of its spark spectrum, which gives two violet lines of wave length 4171 and 4031.
The salts of praseodymium are green in colour, and give a characteristic spark spectrum.