alexa Analysis of off-flavors in the aquatic environment by stir bar sorptive extraction-thermal desorption-capillary GC MS olfactometry.
Environmental Sciences

Environmental Sciences

Hydrology: Current Research

Author(s): Benanou D, Acobas F, de Roubin MR, David F, Sandra P

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Abstract The off-flavor compounds 2-methylisoborneol (MIB), geosmin, 2,4,6-trichloroanisole, 2,3,6-trichloroanisole, 2,3,4-trichloroanisole, and 2,4,6-tribromoanisole were analyzed in water samples by stir bar sorptive extraction (SBSE) followed by on-line thermal desorption (TD) capillary GC/MS. Quantification was performed using the MS in the single-ion-monitoring mode (SIM) with 2,4,6-trichloroanisole-D(5 )as internal standard. Quantification limits are 0.1-0.2 ng L(-1) for the haloanisoles, 0.5 ng L(-1) for geosmin, and 1 ng L(-1) for MIB. The relative standard deviations at the quantification limit ranged from 7 to 14.6\%. SBSE recovery was evaluated by spiking real water samples and varied from 87 to 117\%. More than twenty samples per day can be analyzed by SBSE-TD-capillary GC-MS. The same technique in combination with olfactometry was used to elucidate unknown odorous compounds in water samples. This article was published in Anal Bioanal Chem and referenced in Hydrology: Current Research

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