Quantifying trace odorants in water by GC–MS with trap-based preconcentration: An assessment of high-capacity sorptive extraction

This study describes the use of the new Centri® sample extraction and enrichment platform to extract and quantify trace-level odorants in water, using headspace sorptive extraction with HiSorb probes – in conjunction with trap-based preconcentration and GC–MS. The detection of IPMP, IBMP, 2-MIB, 2,4,6-TCA and geosmin was well below the requirements of ISO 17943 and GB 5749, with linearities >0.996 and mean MDLs of the order of 1 ppt. We also describe the key attributes of HiSorb probes, and discuss the options offered by Centri, which include fully automated immersive sorptive extraction as well as headspace sorptive extraction.