Gas Chromatography (GC-FID, GC-MS)

GC uses a gaseous mobile phase, usually helium or hydrogen. The stationary phase is a microscopic layer of liquid or polymer coated on an inert solid support, with capillary glass being the most common. Separation is achieved when the vaporized compounds interact with stationary phase and elute at a different times, known as the retention time of the compound. Detection if done using a flame ionization detector (FID) or a mass spectrometer (MS). Column chemistry and temperature are the parameters used to optimize the separation. Detection limits for FID detection are in the low ppm range, while MS detection can achieve ppt levels.

GC

Current Methods:
CA409 Method Validation of GC Assay
CA543 Out of Specification Results (OOS) for GC Assays
CA14015 Volatile Aromatics by GC
CA14022 Alcohol Content by GC
CA14028 Cresylic Acid by GC
CA14029 Undecylenic Acid by GC
CA14059 Thymol & Carvacrol by GC FP
CA14062 a-Santalol by GC
CA14074 Linalool by GC
CA15044 Propylene Glycol and Glycerine by GC
CA15049 Glycerin Impurities by GC
CA15061 Camphor Purity by GC
CA15063 Menthol Purity by GC
CA15078 Sunscreen Purity by GC
CA15090 Eugenol by GC
CA17025 Natural Oil Total Fatty Acids by GC
CA17035 Aloe Acids by GC
CA17045 Sterols and Fatty Alcohols by GC
CA26046 Caprylyl Glycol by GC