How to use SPME for Determination of MIB Geosmin in Water

Young boy drinking water from a glass.

The compounds 2-Methylisoborneol (2-MIB) and Geosmin are the primary source of the foul odor found in drinking water. Algal contamination is the principal cause of the formation of these compounds. Geosmin and 2-MIB have such a low odor threshold that even the slightest amount can produce an unpleasant odor and taste in drinking water. Thus, developing a reliable sampling and analysis platform for very low level detection is important. Standard Method 6040D describes a procedure for the detection of 2-MIB and Geosmin using Solid Phase Micro Extraction (SPME) coupled with a Gas Chromatograph (GC) and Mass Spectrometer (MS). Selective Ion Monitoring (SIM) is used for compound detection down to part per trillion (ppt) levels. This examination will optimize the sampling and detection of 2-MIB and Geosmin.


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