Analytical NIAS Screening Protocols for High Temperature Injection Molded Components
High temperature polymer NIAS screening requires combined GC MS and LC HRMS untargeted profiling to detect melt degradation products above ten ppb.
Surrogate Reference Standards
Meaning
Chemical compound benchmarks resembling target analytes yield a baseline for calculating the concentrations of uncalibrated extractables in molded parts. Utilizing surrogate reference standards allows polymer chemists to estimate the levels of newly formed thermal degradation products without having exact matching standards. This technique is applied when evaluating complex resin formulations where many ingredients are unknown or hard to purchase.
These baselines establish a reliable reference point for safety evaluations.
Chemical Comparison
Choosing the correct compounds involves matching the chemical properties and retention times of the target extractables. Through surrogate reference standards, analytical chemists calibrate instruments to quantify unknown compounds with reasonable precision. This methodology is indispensable when analyzing leachables from complex matrices like recycled polymer blends.
Correct selection reduces quantification errors that could lead to false failures.
Calibration Performance
When analyzing molded materials, the surrogate compounds are added to the sample before extraction begins to track the chemical recovery efficiency. These surrogate reference standards undergo the same extraction steps as the polymer matrix, which compensates for any losses during preparation. This procedure maintains the accuracy of the quantification even when processing parameters vary.
Without this baseline, the calculated concentrations of additives would be unreliable.
Molding Standard
Moulders of high-precision parts rely on these chemical baselines to monitor material purity. Since surrogate reference standards ensure reliable chemical profiles, they help prevent the processing of contaminated raw material. This testing protects molders from manufacturing parts that violate chemical safety rules.