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X-ray diffraction from micrograms of quartz on filters using a rotating anode
American Industrial Hygiene Association Journal
|January 1, 1975
Summary
Direct X-ray diffraction analysis can measure as little as 17 mug of quartz on filters. This method eliminates the need for pretreatment, simplifying quartz detection in air samples.
Area of Science:
- Analytical Chemistry
- Mineralogy
- Environmental Science
Background:
- Accurate quantification of airborne crystalline silica, such as quartz, is crucial for occupational health and environmental monitoring.
- Traditional methods for quartz analysis often involve complex and time-consuming pretreatment steps.
- Developing direct, sensitive detection methods is essential for efficient exposure assessment.
Purpose of the Study:
- To evaluate the direct measurement capability of quartz using X-ray diffraction (XRD) on membrane filters.
- To determine the minimum detectable limit of quartz using this direct method.
- To assess the feasibility of eliminating pretreatment steps in quartz analysis.
Main Methods:
- X-ray diffraction (XRD) analysis was performed on poly-vinyl chloride (PVC) membrane filters.
- Samples containing known amounts of quartz (20, 60, and 100 mug) were analyzed.
- A rotating anode X-ray source was utilized for data collection.
Main Results:
- Direct XRD analysis successfully detected quartz on PVC filters without pretreatment.
- The data indicate that as little as 17 mug of quartz, or potentially less, can be directly measured.
- Quantification was achieved on standard 35 mm diameter filters.
Conclusions:
- Direct XRD analysis is a viable method for quantifying quartz on PVC filters.
- The method offers a simplified approach by removing the need for pretreatment.
- This technique holds promise for more efficient and direct monitoring of airborne quartz.