Meaning
Pre-analysis testing procedures that confirm an analytical instrument is performing according to established criteria before active samples are measured ensure the validity of experimental results. Through system suitability verification, laboratories establish that the chromatographic or spectroscopic setup is functioning within acceptable limits. It forms the defensive barrier against generating false data during routine polymer testing.
Evaluation Protocol
The protocol involves running a standard reference material with known properties to measure system repeatability, resolution, and signal-to-noise ratio. If these parameters do not meet the specified targets, the analytical run must be stopped until the cause of the variation is resolved. This check is run before every batch of samples to ensure instrument drift is detected early.
The results are recorded to maintain a continuous trace of instrument performance over time.
Processing Variable
In polymer testing, this step is particularly critical because viscous sample matrices can contaminate injection ports and columns, altering retention times. Uncorrected drift in the chromatography column leads to incorrect molecular weight measurements for incoming resins. It directly prevents the mischaracterization of raw materials.
Analytical Reliability
A secure verification protocol ensures that subsequent analyses of trace migrants or copolymer compositions are legally and technically defensible. It provides the proof that the instrument was functioning correctly when the critical measurements were taken. This protocol acts as a safeguard against product recalls.
