Determination of musty odorants, 2-methylisoborneol and geosmin, in environmental water by headspace solid-phase microextraction and gas chromatography–mass spectrometry

Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

“…Regarding the extraction of 2-MIB and GSM from water samples, various extraction methods in the analysis include closed loop stripping analysis [11], solvent (liquid-liquid) extraction [12,13], or micro extraction [5], solid phase micro extraction with headspace [14], stir bar sorptive extraction [15] and solid phase extraction [16]. Some of these are time-consuming, labor-intensive, are complex for sample preparation or analysis or have poor sensitivity.…”

Simultaneous determination of ten taste and odor compounds in drinking water by solid-phase microextraction combined with gas chromatography-mass spectrometry

“…The extraction efficiency will increase with stirring of the sample solution, which accelerates diffusion of the analytes from the water solution to the SPME fiber coating and reduces the extraction time (Sarafraz-Yazdi et al, 2011). However, rapid stirring tends to be uncontrollable and might cause poor measurement precision (Saito et al, 2008). The stirring rate affected each T&O compound in similar way (Fig.…”

“…Although 65°C was not the equilibrium temperature, it was close to it. Saito et al (2008) found that 70°C was the optimum temperature for MIB, geosmin and other volatile organic compounds. Temperatures higher than 65°C were not considered in this study because water vapor condensation on the fiber was observed at 65°C, and this could damage the GC/MS.…”

Analysis of food taints and off-flavours: a review

“…A number of papers have reported the use of HS-SPME for chloroanisoles and chlorophenols (Ezquerro and Tena, 2005;Bianchi et al, 2003;Insa et al, 2005;Juanola et al, 2005;Martinez-Urunuela et al, 2004b;Riu et al, 2002;Riu et al, 2006) and other compounds responsible for musty-earthy off-odours (Prat, 2008) in cork (Figure 3). SPME has been employed for the determination of iodinated trihalomethanes in water (Cancho et al, 1999), 2-methylisoborneol and geosmin in environmental waters (Saito et al, 2008) and off-flavours in milk (Marsili, 1999). The selectivity of SPME sampling means that although some compounds will not be adsorbed by the fibre (Yang, and Peppard, 1994), generally the background will be less than using direct static headspace (Marsili, 1999).…”