... of the sampling and analytical methodologies that have been promulgated. We attempt to identify needs for new or improved standard sampling protocols, sample preparation techniques, analytical methods, and reference materials. Where applicable, performance data are summarized for standardized methods...

... Reference materials provide the foundation for assessment of analytical chemistry methods, accurate quantification of occupational and environmental exposures, and conduct of in vitro and in vivo toxicology studies for health effects research. Although the National Institute of Standards...

... Thermal conductivity measurements of four thermal insulation reference aterials are presented. The measurements were obtained from an international study of guarded-hot-plate laboratories in Canada, France, Japan, the United Kingdom, and the United States. For each reference material, the study...

... the A302B and A533B-1 plate materials is similar. There is evidence for a flux effect in the CMM data irradiated in test reactors; thus its implication for power reactor surveillance programs deserves special attention. radiation embrittlement power reactor database LWR reference materials J...

... A polyethylene film sample, inhibited with a hindered phenol antioxidant, is proposed as a Standard Reference Material for oxidative induction time (OIT) testing. The mean OIT values, derived from nine interlaboratory studies and for a number of experimental conditions, are presented...

... The selection, manufacture and use of Bulk Site Reference Materials (BSRMs) at hazardous waste sites is discussed. BSRMs are useful in preparing stabilization/solidification (S/S) formulations for soils, ranking competing S/S processes, comparing S/S alternatives to other technologies...

... methods of atomic absorption, inductively-coupled plasma atomic emission, and X-ray fluorescence spectrometries and (2) the field-based methods of portable X-ray fluorescence spectrometry and test kits. Their performances were evaluated using, when available, Standard Reference Materials, method...

... control reference materials Harold A. Vincent I and Dawn M. Boyer2 AN EXAMINATION OF AN XRF METHOD USED FOR THE DETERMINATION OF LEAD IN URBAN SOIL AND DUST SAMPLES REFERENCE: Vincent, H.A. and Boyer, D.M., "An Examination of an XRF Method Used for the Determination of Lead in Urban Soil and Dust...

...) is responsible for providing the link between chemical measurements in the U.S. and the SI units of the kilogram and the mole. NIST provides this traceability for measurements through a highly leveraged system of key Standard Reference Materials (SRMs)and primary methods. The design, development, and application...

... limits calculated from the statistical treatment of multi-laboratory test data. X-ray Fluorescence (XRF) Inductively Coupled Plasma — Atomic Emission Spectroscopy (ICP-AES) Atomic Absorption Spectroscopy (AAS) lead soil dust quality control double-blind reference materials Harold...

... Thirteen reference materials prepared under the Euratom Working Group on Reactor Dosimetry (EWGRD) monitor materials programme are now available. The determination of trace impurities has recently been completed for rhodium metal (iridium 26.0 ± 0.6 mg·kg −1 , platinum < 5 mg·kg −1...

... in various federal agencies that have environmental testing and measurement responsibilities. quality assurance quality control environmental measurements data quality objectives method validation method equivalency reference materials performance evaluation Llewellyn R. Williams I...

... The Marine Analytical Chemistry Standards Program was established in 1976 by the National Research Council of Canada in support of analytical aspects of marine chemistry. Part of the mandate of the program has been the development of a series of reference materials for the determination of trace...

... and requirements are also addressed, specifically with regard to higher temperatures of operation. calibration guarded hot plate heat flow meter heat flux transducer product variability quality assurance radiation reference materials thermal insulation thickness effect transfer standards Ronald...

... Reference materials and intercomparison samples may be obtained by laboratories involved in the analysis of environmental samples containing radioactivity, pesticides, toxic inorganic species, or toxic organic species. These reference materials and intercomparison samples are available from...

.... reference materials calibration standards quality control samples quality assurance water/wastewater analyses interlaboratory quality control John A. Winter^ Reference Samples for Water-Related Programs in the U.S. Environmental Protection Agency REFERENCE: Winter, J. A., "Reference Samples...

... charts data quality environmental analysis precision quality assessment quality assurance quality control reference materials standard methods John K. Taylor^ What is Quality Assurance? REFERENCE: Taylor, J. K., "What is Quality Assurance?" Quality Assurance for Environmental Measurements...

... Chemical analysts need biological reference materials that contain higher levels of toxic elements than are usually present in natural-source materials [e.g., orchard leaves, tomato leaves, or pine needles, available from the National Bureau of Standards (NBS)]. The purpose of this study...

... collection and research program activities. reference samples reference materials standards quality assurance quality control water analysis water quality Victor J. Janzer^ The Use of Natural Waters as U.S. Geological Survey Reference Samples REFERENCE: Janzer, V. J., "The Use of Natural...

... The Marine Analytical Chemistry Standards Program (MACSP) of the National Research Council of Canada (NRCC) is described. This program, established in 1976, has resulted in the production, to date, of seven reference materials for the determination of trace metals and organic compounds in marine...