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ASPECTS CONCERNING THE ESTIMATION OF UNCERTAINTY OF MEASUREMENT ISSUES FOR DETERMINATION OF SULPHATE IN WASTE WATERS THROUGH SPECTROPHOTOMETRIC METHOD
Abstract:
This paper aims to present a model of estimation of the uncertainty for the determination of sulphate in wastewater made in a test laboratory accredited by RENAR. One of the fundamental requirements placed before testing laboratories ISO 17025 standard is the estimation and reporting of budget uncertainty and traceability to international standards. Knowing the measurement uncertainty of test results is a fundamental importance for all laboratories and institutions using these results for comparative purposes. Measurement uncertainty is a parameter associated with the outcome of a measurement, which characterizes the scattering of which could reasonably be attributed to the measure. It is important to take into account not only one measurement, but the overall result of the measurement. In this case the uncertainty of measurement takes into account all components of the test. Test results must represent the best approximation to the true value.

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