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SILICA, CRYSTALLINE by IR (KBr pellet) 7602
www.cdc.govSilica, Crystalline by IR: Method 7602, Issue 3, dated 15 March 2003 - Page 4 of 6 NIOSH Manual of Analytical Methods (NMAM), Fourth Edition NOTE: Some training (university or short course) in geology or mineralogy can be useful for the analyst