Showing papers on "Fluorescence spectrometry published in 1969"
Book•
01 Jan 1969
TL;DR: In this paper, the authors discuss all of the usual practical difficulties experienced in the application of x-ray fluorescence spectrometry, and illustrate the specific points by worked examples where possible.
Abstract: Worthwhile treatment which discusses all of the usual practical difficulties experienced in the application of x-ray fluorescence spectrometry. Purely theoretical data is purposely kept minimal. Specific points are illustrated by worked examples where possible. Chapter references. For those training to be x-ray spectroscopists as well as more experienced workers in the field. Contents: Physics of x-rays. Dispersion. Detection. Pulse height selection. Counting statistics. Matrix effects. Quantative analysis. Sample preparation. Trace analysis. Appendices. Index. -- AATA
189 citations
TL;DR: The X-ray fluorescence spectrometer and isotope dilution techniques have been used for determining low concentrations of these elements in pyroxene Px-1 and peridotite PCC-1 as discussed by the authors.
36 citations
TL;DR: A survey of detection limits currently obtainable by X-ray fluorescence spectrometry is given in this article, where the significance and limitation of certain instrumental variables are evaluated in light of recent developments in this field with examples taken from different parts of the wavelength range.
Abstract: A survey is given of detection limits currently obtainable by X-ray fluorescence spectrometry. The significance and limitation of certain instrumental variables are evaluated in the light of recent developments in this field with examples taken from different parts of the wavelength range. Mention is made of possible future trends in instrumentation and their likely effect on detection limits discussed.
10 citations
TL;DR: In this paper, a method for reducing the backstreaming of vapours from rotary vacuum pump oils caused contamination by the absorption of sulphur-containing compounds by the surface of powder specimens.
Abstract: The determination of light elements by X-ray fluorescence spectrometry requires minimal absorption in the X-ray path. This is usually achieved by evacuation of the spectrometer with a rotary vacuum pump. Backstreaming of vapours from rotary vacuum pump oils causes contamination by the absorption of sulphur-containing compounds by the surface of powder specimens. A method is described for greatly decreasing this contamination by preparing powder specimens with a thin plastic film over the surface to be analysed.
5 citations
TL;DR: In this article, the fluorescence and phosphorescence spectral characteristics of twelve phenyl-substituted silanes have been determined; the limits of detection by fluorimetry and phosphorimetry are compared and the possibility of luminescence assay is discussed.
4 citations
TL;DR: In this paper, chromium is added to chromatographic paper discs and analyzed by x-ray fluorescence spectrometry, which is best in the concentration range 5-400 p.p.m.
Abstract: The method involves the addition of chromium as an internal standard and requires no other chemical pretreatment. Samples are spotted directly onto chromatographic paper discs and analyzed by x-ray fluorescence spectrometry. The method is rapid, and is best in the concentration range 5–400 p.p.m.
4 citations