Accuracy and precision of quantitative energy-dispersive x-ray spectrometry in the environmental scanning electron microscope |
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Authors: | Carlton Robert A Lyman Charles E Roberts James E |
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Affiliation: | Rhone-Poulenc Rorer, Collegeville, Pennsylvania, USA. robert.a.carlton@gsk.com |
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Abstract: | The accuracy and precision of quantitative energy-dispersive x-ray spectrometry in the environmental scanning electron microscope have been estimated using a series of copper / gold alloys of known composition. The mean values (five to six replicate experiments) had relative errors within +/- 5%, and most were within +/- 3.5%. All relative standard deviations were < 5% and most were < 3%. Since the standard specimens were large (approximately 500 microm) in diameter, electron scattering in the 2 torr of water vapor above the specimen did not affect the results. This level of accuracy and precision was possible only by using a novel specimen surface charge neutralization scheme. |
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Keywords: | accuracy energy‐dispersive x‐ray spectrometry environmental scanning electron microscopy NIST (NBS) SRM 482 charge neutralization |
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