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The Use of Perchloryl Fluoride in Flame Photometry

Volume 12, Number 3 (July 1958) Page 98-102

Schmauch, George E.; Serfass, Earl J.

Perchloryl fluoride and hydrogen as a gas combination burned in a modified Beckman burner produces an easily controlled, bluish flame with sufficiently low background for use as an excitation source. A survey of the type of spectra produced by the hydrogen-perchloryl fluoride flame with various series of solutions of metallic salts was performed to determine the effectiveness of this gas combination in flame photometric analyses.

A comparison of the various lines and bands produced upon excitation of samples by three gas combinations was made. These included acetylene-oxygen, hydrogen-fluorine, and hydrogen-perchloryl fluoride gas combinations. From this comparison, one observes that primarily atomic line and metal oxide band radiation is produced by the acetylene-oxygen flame and primarily atomic line and metal fluoride and chloride band radiation is produced by the hydrogen-perchloryl fluoride flame. The hydrogen-fluorine flame produced primarily atomic line and metal fluoride band radiation for the elements studied. Both the hydrogen-fluorine and the hydrogen-perchloryl fluoride flames are capable of producing the same type of radiation, however, the lines and bands produced by the former are generally more intense.

It should be noted that, in general, the solvent does not effect the type of radiation observed for a particular element when excited with the hydrogen-perchloryl fluoride flame, but the organic solvents seem to produce higher intensity under similar conditions.