By Kevin Ashley, editor
9 peer-reviewed papers give you the most recent study on beryllium pattern assortment, education, and dimension. STP 1473 additionally identifies new components of criteria improvement bearing on beryllium sampling and analytical methods. subject matters disguise: Beryllium Disease--Exposure tracking and Standardization matters: an evaluate of beryllium ailment and efforts to lessen employee exposures via more desirable tracking equipment and the improvement of ordinary methodologies. Papers speak about the commercial makes use of of beryllium, the background of beryllium disorder, occupational publicity tracking, and standardization of sampling and analytical tools. Beryllium publicity size and Reference Materials--National and foreign views: worldwide efforts and development in beryllium occupational tracking, in addition to the improvement and characterization of beryllium reference fabrics. functions of sampling and analytical easy methods to commercial hygiene chemistry and perform are highlighted, and wishes for reference fabrics containing beryllium oxide are pointed out. On-Site tracking for Beryllium--Sampling and Analytical features: new moveable analytical tools for choosing hint beryllium in samples from air and surfaces, time qualitative and semi-quantitative equipment, and close to real-time quantitative options for ultra-trace Be research.
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Additional info for Beryllium: Sampling and Analysis (ASTM special technical publication, 1473)
Figure 2 illustrates the relationships between an existing reference material (or set of reference materials) and a MYOM. The certified or reference values for a MYOM are calculated using the corresponding values for the parent materials and the gravimetric dilution factor. To preserve the uncertainty levels of the parent materials in the MYOM, the uncertainty component associated with weighing and blending must be small compared to the uncertainties in the parent materials. MYOMs meet the ISO requirements for CRMs.
Conclusion A number of opportunities exist for identification and development of new beryllium reference materials. Taking advantage of these opportunities will require multi-disciplinary and multi-organizational collaboration. Past experiences can be built upon and new relationships and capabilities can be conceived and implemented. Beryllium is not the only toxic material for which a broader spectrum of reference materials would be useful. Lessons from new initiatives in beryllium can inform our strategies for dealing with other toxic agents over a broad spectrum of organizational and disciplinary lines.
For soils and sediments, extensive grinding, milling, and sieving may be required to prepare the material for blending. Effective homogenization requires a narrow particle size distribution; however, the material becomes less useful for bulk physical properties performance measures. For natural-matrix reference materials, the emphasis at NIST is usually on chemical composition, so most materials undergo extensive treatments to obtain homogeneous samples with small mean particle sizes. S. Geological Survey (USGS) collaborated in 1992 to produce a series of three SRM soil materials: SRM 2709 San Joaquin Soil, SRM 2710 Montana Soil with highly elevated trace element concentrations, and SRM 2711 Montana Soil with moderately elevated trace element concentrations.