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2009BS EN ISO 20565-2:2009 Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method). Wet chemical analysis
2009BS EN ISO 20565-1:2008 Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method).Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica