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See Chinese contents: GB/T 223.79-2007 GB/T 223.79-2007: Iron and steel -- Determination of multi-element contents -- X-ray fluorescence spectrometry (Routine method)
This Part of GB/T 223 specifies using x-ray fluorescence spectrometry to determine the contents of silicon, manganese, phosphorus, sulfur, copper, aluminum, nickel, chromium, molybdenum, vanadium, titanium, tungsten, and niobium.
