Determination of Flavor Compounds in Dietary Supplements by Thermal Desorption GC-MS with Automated Introduction of Standards and Retention Time Index Mix

A methodology is presented for the determination of flavor compounds in dietary supplements using Stir Bar Sorptive Extraction (SBSE). Quantitation is accomplished by automating the spiking of Tenax-TA® filled sorbent tubes. A retention time index (RTI) standard is also introduced. The GERSTEL Internal Standard/Dry Purge Plus (ISDP+) module automates spiking of standards, internal standards, or a retention index mix and is used to dry purge sorbent tubes to remove excess water or solvent, that may adversely affect the trapping and transfer of analytes to the GC column.