Meaning
Calibrated physical samples with certified properties serve as the primary link between a laboratory’s measurements and international standards. These standard reference materials provide known values for attributes like molecular weight, density or the concentration of specific additives in a polymer matrix. They are used to validate the accuracy of instruments and the proficiency of the technicians performing the tests.
Traceability Chain
Using materials from a national metrology institute ensures that the results in one lab can be compared to results in another. This traceability is essential for global trade, where a resin producer and a moulder must agree on the properties of a shipment. Without these benchmarks, there would be no way to resolve disputes over material quality.
Instrumental Validation
Running a standard reference material before a batch of unknown samples confirms that the chromatograph or melt flow tester is operating correctly. If the measured value falls outside the certified range, the instrument must be recalibrated or repaired. This prevents the generation of false data that could lead to the rejection of good material.
Storage Requirement
Maintaining the integrity of these materials requires careful control of temperature, light and humidity to prevent degradation. A contaminated or degraded standard will lead to incorrect calibration and faulty results. Proper management of the reference library is a cornerstone of a high-quality laboratory operation.
