Information: Use of the Ex-6500 energy-dispersive x-ray fluorescence spectrometer in quantitative analysis. Component determination in noble metal alloys
In the early 1990s, the BAIRD Co. put new analytical instruments on the world market - EX-series energy-dispersive x-ray fluorescence spectrometers intended for high-precision determination of macrocomponents in various materials over a wide spectral range with enhanced sensitivity for light elements. The high performance characteristics of these spectrometers has attracted the attention of numerous users in Europe, including Russia. In 1993-1994, several EX-series spectrometers (EX-6500 version) were supplied to a number of metallurgical works in Russia. At present, all these instruments have been put into service and are effectively used in factory laboratories. The statistical evidence available by now enables one to assess the strong and weak points of this instrumentation in solving concrete analytical problems. Data on jewelry alloys of noble metals analyzed by means of an EX-6500 spectrometer are given be- low; in our subsequent communications we intend to present results of analysis for various materials of ferrous metallurgy. The quantitative analysis of noble metals is a complicated analytical task in view of the stringent requirements imposed on the composition of such materials, which necessitates the use of high-precision analytical techniques. According to currently adopted standards in the analysis of noble metal alloys, the absolute tolerated error of parallel determinations for a confidence probability p = 0.95 must not be higher than 0.20% for the mass fraction of a particular component in an alloy up to 99.9%. Such a small error is usually achieved by using gravimetry or titrimetry, which requires time-consuming and laborious preparation of a sample for analysis. Viewed practically, the replacement of these conventional wet chemistry methods by advanced sophisticated instrumentation capable of ensuring the required accuracy of measurement, saving analysis time, and making sample preparation easier is undoubtedly advantageous.
- OSTI ID:
- 244126
- Journal Information:
- Industrial Laboratory, Vol. 61, Issue 5; Other Information: PBD: Nov 1995; TN: Translated from Zavodskaya Laboratoriya; 61: No. 5, 58-63(May 1995)
- Country of Publication:
- United States
- Language:
- English
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