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The second edition stressed that the procedures introduced by a laboratory to estimate its measurement uncertainty should be integrated with existing quality assurance measures, since these measures frequently provide much of the information required to evaluate the measurement uncertainty.
5 kwi 2001 · Examples of sources of uncertainty in our field are the measurement of volumes, weighing, reaction temperature, purity of reagents, and value assigned to the calibrator. Also properties of the instrument used e.g. the size and tolerance of the cuvette, if the instrument uses more than one cuvette they may be different, the wavelength etc.
1 kwi 2023 · In order to build a suitable framework, we adopt the approach of risk analysis and discuss three main sources of uncertainty: 1) uncertainty concerning the outcomes; 2) uncertainty concerning the probability of discovery and 3) uncertainty concerning the value of the findings.
This suite of examples illustrates good practice in evaluating measurement uncertainty in a variety of fields including calibration, testing, comparison and conformity, and relate to sectors that include environment, energy, quality of life, industry and society.
18 sty 2022 · In this article, we distinguish between the use of an expression of uncertainty as information for the recipient of a measurement result and its use when propagating uncertainty about inputs to a measurement model in order to derive the uncertainty in a measurand.
Revised version of ISO 19036 offers a pragmatic approach to MU in quantitative food chain microbiology choice left between. Comprehensive approach with 3 components: technical, matrix and distributional uncertainties. Simplified approach: MU restricted to technical uncertainty.
All the methods presented are illustrated with examples involving real measurement results from a wide range of fields of chemistry and related sciences, ranging from classical analytical chemistry as practiced at the beginning to the 20th century, to contemporary studies of isotopic compositions of the elements and clinical trials.
