Family-owned in the second generation since its founding in 1967, GERSTEL is mainly focused on automated sample preparation for Gas Chromatography / Mass Spectrometry (GC/MS) and Liquid Chromatography / Mass Spectrometry (LC/MS). 

        GERSTEL Twister Stir Bar Sorptive Extraction (SBSE) is a powerful tool for efficiently extracting organic compounds from aqueous and other polar solutions. When volatile and semi-volatile compounds are to be determined by GC or GC/MS, thermal desorption using a GERSTEL TDS 3 or TDU is the most effective technique for transferring analytes from the stir bar for analysis. This produces the highest recoveries of analytes from the stir bars, and the lowest detection limits and background levels. Analytes are transfered almost 100% to the GC column. SBSE provides 1000 times lower detection limits than solid phase microextraction (SPME): The GERSTEL Twister - a polydimethylsiloxane (PDMS) coated stir bar for use with common stir plates.