Abstract
Optimum conditions are reported to determine several non-metallic elements by measuring their gaseous molecular absorbance. The conditions are explored that are necessary to enhance the sensitivity and minimize the interference of variable matrices. Molecular spectra are shown for several diatomic molecules of several metallic and nonmetallic species and the influence of other metal species on these spectra are reported. Some general methods are proposed for the determination of halides and sulfur-containing species. Detection limits in the low ng range for F and Cl were found by measuring the absorbance of Al X, Ga X and In X and, in the range of 30–100 ng for Br, I and S, by measuring the absorbance of AlBr, TlI and GeS. Methods are reported to determine Cl in AgBr used for photographic purposes and Cl in Se semiconductor materials.
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