Quantitative analysis of dust samples from occupational environments using computer-automated x-ray diffraction.
Abell-MT; Dollberg-DD; Crable-JV
Adv X-Ray Anal 1981; 24:37-48
The use of x-ray diffraction for the quantitative analysis of occupational dusts was reviewed. The analytical procedure involved collection of a breathing zone, respirable air sample using a membrane filter apparatus worn by the worker during an 8 hour work period. The membrane filter was then destroyed by ashing, and the dust was dispersed by ultrasonic agitation in alcohol. Analysis by x-ray diffraction required the suspended dust to be redeposited as a uniform layer onto a silver membrane filter. Computer automation of the x-ray diffraction process increased the number of samples that could be analyzed and freed the analyst from the routine tasks involved in analysis. Other advantages of computer automation were economy and efficiency, improved data quality, flexibility through reprogramming capabilities, and the ability to extend the automation into decision making and computation programs. Parameter input sequences for the automated diffractometer were shown for determination of phase step time, different types of sample, and calibration curve data. The authors note that the use of the collection filter for analysis rather than redeposition onto the silver filter would improve the x-ray diffraction method.
NIOSH-Author; Industrial-environment; Analytical-chemistry; Respiratory-irritants; Air-contamination; Air-quality; Dust-analysis; X-ray-analysis; Dust-exposure; Dust-particles; Industrial-hygiene; Quantitative-analysis; Occupational-hazards
Advances in X-Ray Analysis: Proceedings of the Annual Conference on Application of X-Ray Analysis