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View larger ISO 11438-5:1993 [ Withdrawn ]
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ISO 11438-5:1993 Ferronickel - Determination of trace-element content by electrothermal atomic absorption spectrometric method - Part 5: Determination of tellurium content
standard by International Organization for Standardization, 12/01/1993
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The principle of the method specified is dissolution of a test portion in nitric acid, measurement of the absorption of the resonance line energy from the spectrum of tellurium in the test solution at a wavelength of 214,3 nm by an atomic absorption spectrometer fitted with a graphite furnace electrothermal atomizer, calibration by the standard additions method described in ISO 11438-1. Applies to tellurium contents in the range of 0,3 g/t to 2,0 g/t in ferronickel.