title: Determination of quartz on membrane filters by X-ray diffraction.
abstract: An X-ray diffraction method is described for the quantitative determination of quartz in dust samples. The analysis was done directly on a collecting cellulose ester membrane filter of the type used in an air sampler. Quantitation was achieved by the measurement of the quartz line intensities with a digital integrator and by the comparison of these values with those measured from calibration standards prepared on similar filters with water suspensions. The overall precision of the procedure was 8%. When the method was applied to foundry dusts, the accuracy of the quartz analysis was fou,d to be within 10% at the 1- to 10-mg level of total loading. The detection limit for quartz was below 0.1 mg.
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D004391:Dust / Q000032:analysis*; D008851:Micropore Filters; D010316:Particle Size; D011791:Quartz / Q000032:analysis*; D012822:Silicon Dioxide / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D004391:Dust; D011791:Quartz; D012822:Silicon Dioxide