X-Ray powder diffraction.
Methods of Air Sampling and Analysis, 3rd edition, 1989:214-218
The use of X-ray powder diffraction as a method for air monitoring was discussed. Most of the airborne dusts monitored by this method have been crystalline compounds, which indicates that they will give distinctive X-ray diffraction patterns. Primarily X-ray powder diffraction has been used for inorganic compounds. The report discussed the principle of the method including theory, qualitative analysis, quantitative analysis, and interferences; sample collection and preparation including types of samples, filters for personal samples, and redeposition; standards and calibration including standards for powder; data collection including instrument calibration, intensity measurements, and absorption corrections. This method had found its greatest use for silica (14808607) but has also been applied to asbestos (1332214), talc (14807966), metal oxides, and others. The applicability of the method was limited when particle shape must also be known. Because this method can determine the exact composition of crystalline dusts, it has an advantage over elemental analyses that cannot so speciate. The authors predict that it will find increasing use in air monitoring applications.
Analytical-methods; Air-quality-monitoring; Air-sampling; Sampling-equipment; X-ray-analysis; Mineral-dusts; Airborne-dusts;
14808-60-7; 1332-21-4; 14807-96-6;
Book or book chapter;
Methods of Air Sampling and Analysis, 3rd edition, J. P. Lodge, Jr., Ed.; Chelsea, Michigan, Lewis Publishers, Inc.