Page:NIOSH Manual of Analytical Methods - Chapter R.pdf/10

 '''TABLE 3. X-RAY DIFFRACTION SAMPLING AND ANALYTICAL METHODS FOR CRYSTALLINE SILICA.'''

* Precision is noted in terms of CV (coefficient of variation) for all methods for convenience of comparison. CV is equivalent to sr (relative standard deviation). In some methods, precision is noted in terms of (pooled relative standard deviation) which is equivalent to $$\overline{CV}$$

NMAM=NIOSH Manual of Analytical Methods, OSHA=Occupational Safety and Health Administration, MSHA=Mine Safety and Health Administration, MDHS=Methods for Determination of Hazardous Substances, PVC=polyvinyl chloride, RF=radio frequency, THF=tetrahydrofuran, Cu=copper, kV=kilovolts, mA=milliamps, PAT=proficiency analytical testing, WASP=workplace analysis scheme for proficiency, LOD=limit of detection, CV = coefficient of variation. 3/15/03