Meaning
Measurement quality in polymer testing is quantified by defining the range of values within which the true value of an analyte is expected to lie. Calculating the quantification uncertainty provides a statistical bound for the measured concentration of plasticizers, flame retardants, or residual monomers in a polymer sample. This parameter governs the reliability of compliance declarations, ensuring that testing results do not lead to false passes of contaminated material.
It is determined by combining the uncertainties of sample preparation, instrument calibration, and analyst repeatability.
Quality Assurance
Testing laboratories must report the precision of their measurements to maintain international accreditation. Calculating the error margin for each testing protocol assures customers of the reliability of the test data. This practice improves laboratory credibility.
Measurement Accuracy
Additive dispersion within a polymer part is often non-uniform, introducing sampling errors. Quantifying these sampling variations alongside instrumental limits yields a realistic error budget. This budget is critical for assessing high-risk medical grade plastics.
Testing Reliability
Regulatory decisions depend on whether a contaminant concentration sits safely below the action limit. When the measured value plus its uncertainty exceeds the threshold, the material cannot be approved. This statistical rigor prevents legal liabilities for the manufacturer.
