L-Menthol and DL-Camphor are widely used in topical analgesic formulations for their cooling and pain-relieving effects.
 Using the ChroZen GC/FID system equipped with the PAL RSI-Liquid Injection Module, their contents were accurately quantified with excellent linearity (R² = 0.9996) and reproducibility.
This application demonstrates the ChroZen GC/FID as a reliable and efficient solution for routine quality control of topical pharmaceutical products.