نتایج جستجو برای: interlaboratory comparison
تعداد نتایج: 604926 فیلتر نتایج به سال:
Standard Reference Materials (SRMs) are certified reference materials produced by the National Institute of Standards and Technology that are homogeneous materials well characterized with values for specified properties, such as environmental contaminant concentrations. They can be used to validate measurement methods and are critical in improving data quality. Disagreements in perfluorinated a...
A study was performed to investigate interlaboratory test agreement between a research and a commercial veterinary diagnostic laboratory on blood and urine samples, and to investigate test agreement between blood, urine, and kidney samples (research laboratory) for leptospirosis diagnosis. Samples were sourced from 399 sheep and 146 beef cattle from a local abattoir. Interlaboratory agreement f...
This interlaboratory study on determination of 25-hydroxyvitamin D (25-OH-D) in serum involved 15 laboratories in eight European countries. All could distinguish between normal (50 +/- 31 nmol/L, mean +/- SD) and grossly increased concentrations, but for eight laboratories the results for serum samples with low and normal 25-OH-D content overlapped. In general, values were well reproducible, bu...
An interlaboratory study for the radioimmunological determination of calcitonin was performed within the European PTH Study Group (ESPG), to improve comparability using external quality control. Twelve laboratories determined calcitonin in 21 deep frozen samples using their respective calcitonin radioimmunoassay systems. The samples included a standard curves of human calcitonin (sequence 1-32)...
These suggestions are as follows: 1) Regular use of certified reference materials and/or internal quality control using secondary reference materials 2) Participation in interlaboratory comparison or proficiency testing programs 3) Replicate tests or calibrations using the same or different methods 4) Retesting or recalibration of retained items 5) Correlation of results for different character...
A pilot scheme for technical quality control in histopathology is described. The test material used and the methods of assessment and reporting are detailed. The scheme outlines not only interlaboratory comparison of technical performance but also provides a method of sharing uncommon material.
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