Multichannel instruments for fluorescent X-ray spectroscopy

Fluorescent X-Ray Spectral Analysis of Powdered Solids by Matrix Dilution

“…This interaction, which results in nonlinearity of fluorescent intensity with concentration in binary and other mixtures, is well known, and has been demonstrated experimentally for systems which contained some of the ele-ments in the present study (3,8,13,14). If the radiation emitted by each and every element present is measuredfor example, in a series of four-component alloys containing the same elements but in varying ratios-the interelemental effects of absorption and enhancement can be evaluated (1).…”

“…In the petroleum industry such diverse applications as measurement of lead and bromine in ethyl gasoline (8,10), metal additives in lubricating oils (6), and contaminant metals in fluid cracking catalyst (7) have been reported. Although each application reported is satisfactory for measuring an element in a particular substrate or basic substance, the methods have one notable characteristic in commonthe procedure described is highly specific to the substance analyzed.…”

X-Ray Absorption and Emission

“…Brackett (II) has rev iewed this book. | A7olume It of "Analytical Chemistry, The AA7orking Tools," edited by Strouts, Gilfallen, and AAulson (116), presents a good discussion of the use of ultraviolet spectra in molecular structure studies and functional group analysis. Its lengthy material on photographic spectrophotometry seems rather obsolete, however, as does its neglect of modern recording spectrophotometers.…”