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Quantification of volatile-alkylated selenium and sulfur in complex aqueous media using solid-phase microextraction.

Journal of chromatography. A (2015-07-08)
Bas Vriens, Marcel Mathis, Lenny H E Winkel, Michael Berg
RÉSUMÉ

Biologically produced volatile-alkylated Se and S compounds play an important role in the global biogeochemical Se and S cycles, are important constituents of odorous industrial emissions, and contribute to (off-)flavors in food and beverages. This study presents a fully automated direct-immersion solid-phase microextraction (DI-SPME) method coupled with capillary gas chromatography-mass spectrometry (GC/MS) for the simultaneous quantification of 10 volatile-alkylated Se and S compounds in complex aqueous media. Instrumental parameters of the SPME procedure were optimized to yield extraction efficiencies of up to 96% from complex aqueous matrices. The effects of sample matrix composition and analyte transformation during sample storage were critically assessed. With the use of internal standards and procedural calibrations, the DI-SPME-GC/MS method allows for trace-level quantification of volatile Se and S compounds in the ng/L range (e.g. down to 30 ng/L dimethyl sulfide and 75 ng/L dimethyl selenide). The applicability and robustness of the presented method demonstrate that the method may be used to quantify volatile Se and S compounds in complex aqueous samples, such as industrial effluents or food and beverage samples.

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Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, needle size 24 ga, for use with manual holder
Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 23 ga
Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 24 ga
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with autosampler
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with manual holder
Supelco
Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 23 ga
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 23 ga, PDMS/DVB StableFlex, for use with autosampler
Supelco
Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 24 ga
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, StableFlex, for use with manual holder
Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 100 μm(PDMS, for use with manual holder, needle size 23 ga
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler
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SPME StableFlex fiber assortment kit, for use with manual holder
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SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm(PEG, for use with autosampler
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga
Supelco
SPME StableFlex fiber assortment kit, needle size 23 ga, for use with autosampler
Supelco
Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), fused silica fiber, df 65 μm(PDMS/DVB, for use with manual holder, needle size 23 ga
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Assortiment de fibres SPME 4, for use with manual holder, size 24 ga
Supelco
Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with manual holder, needle size 24 ga
Supelco
SPME fiber assembly, Carbowax-Polyethylene Glycol (PEG) Coating, needle size 23 ga, df 60 μm(PEG, metal alloy fiber, for use with manual holder
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Assortiment de fibres SPME 1, for use with autosampler, needle size 24 ga
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Echantillonneur de terrain portable SPME, coating PDMS
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SPME-OC Fiber Assembly, Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 75 μm(Coating thickness includes 65 μm coating + 10 μm OC (overcoating), needle size 23 ga, pkg of 3 ea, fiber L 1 cm
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Fibres SPME Polydimethylsiloxane (PDMS), df 7 μm(PDMS, needle size 23 ga, for use with autosampler
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Fibres SPME Polydimethylsiloxane (PDMS), df 30 μm(PDMS, needle size 24 ga, for use with manual holder
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Support d′échantillonnage SPME, for use with 15 mL vials
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Echantillonneur de terrain portable SPME, coating PDMS/DVB
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Assortiment de fibres SPME 1, for use with manual holder, needle size 24 ga
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SPME StableFlex fiber assortment kit, needle size 24 ga, for use with autosampler
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Echantillonneur de terrain portable SPME, coating CAR/PDMS
Supelco
Fibres SPME Polydimethylsiloxane (PDMS), df 7 μm(PDMS, needle size 24 ga, for use with manual holder