New approach to resolve the humidity problem in VOC determination in outdoor air samples using solid adsorbent tubes followed by TD-GC-MS.

New approach to resolve the humidity problem in VOC determination in outdoor air samples using solid adsorbent tubes followed by TD-GC-MS.

The Science of the total environment (2017-05-26)

Alba Maceira, Laura Vallecillos, Francesc Borrull, Rosa Maria Marcé

RÉSUMÉ

This study describes the humidity effect in the sampling process by adsorbent tubes followed by thermal desorption and gas chromatography-mass spectrometry (TD-GC-MS) for the determination of volatile organic compounds (VOCs) in air samples and evaluates possible solutions to this problem. Two multi-sorbent bed tubes, Tenax TA/Carbograph 1TD and Carbotrap B/Carbopack X/Carboxen 569, were tested in order to evaluate their behaviour in the presence of environmental humidity. Humidity problems were demonstrated with carbon-based tubes, while Tenax-based tubes did not display any influence. Silica gel, a molecular sieve and CaCl

MATÉRIAUX

Référence du produit

Marque

Description du produit

57348-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (2cm), needle size 24 ga, Autosampler, pk of 3, notched gray hub

57328-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (1cm), needle size 24 ga, Manual Holder, pk of 3, plain gray hub

57298-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 23 ga, Autosampler, pk of 3, plain gray hub

20358

Supelco

ORBO^™ 90, Carboxen^® 564 (20/45), 160/80 mg, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)

57329-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, plain gray hub

57299-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, StableFlex (2cm), needle size 23 ga, Autosampler, pk of 3, notched gray hub

20355

Supelco

ORBO-78 400/200 MG PK/25, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea

25467

Supelco

Colonne capillaire Carboxen^®-1010 PLOT pour GC/CPG, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

57318

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga

10478-U

Supelco

Adsorbant Carboxen^®, matrix Carboxen^® 1000, 60-80 mesh, bottle of 10 g

28686-U

Supelco

Tube TD en acier inoxydable désactivé FLM Carbopack^™ X, preconditioned, pkg of 10 tubes, O.D. × L 1/4 in. (6.35 mm) × 3 1/2 in. (89 mm)

25461

Supelco

Colonne capillaire Carboxen^®-1006 PLOT pour GC/CPG, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

57295-U

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler

57335-U

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler

24246

Supelco

Colonne capillaire Carboxen^®-1010 PLOT pour GC/CPG, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

20273

Supelco

Adsorbant Carbopack^™, matrix Carbopack^™ B, 60-80 mesh, bottle of 10 g

57319

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler

20254-U

Supelco

ORBO^™ 101, Carbotrap^® B (20/40), 100/50 mg, W,W,W separators, O.D. × L 6 mm × 70 mm, pkg of 25 ea

57334-U

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber

57343-U

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler

29746-U

Supelco

Carbotrap^® 300, O.D. × L 1/4 in. × 3 1/2 in., stainless steel TD tube, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea

10258

Supelco

Adsorbant Carbopack^™, matrix Carbopack^™ C, 80-100 mesh, bottle of 10 g

10257

Supelco

Adsorbant Carbopack^™, matrix Carbopack^™ C, 60-80 mesh, bottle of 10 g

21705-U

Supelco

Carbotrap^® 300, O.D. × L 1/4 in. × 3 1/2 in., stainless steel TD tube, preconditioned, pkg of 10 ea

20287

Supelco

Carbotrap^® Adsorbent, matrix Carbotrap^® B, 20-40 mesh, bottle of 10 g

57344-U

Supelco

Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder

24241-U

Supelco

Colonne capillaire Carboxen^®-1006 PLOT pour GC/CPG, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

20255-U

Supelco

ORBO^™ 100, Carbotrap^® B (20/40), 350/175 mg, W,W,W separators, O.D. × L 7 mm × 110 mm, pkg of 25 ea

10436

Supelco

Adsorbant Carbopack^™, matrix Carbopack^™ X, 40-60 mesh, bottle of 10 g

57914-U

Supelco

Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), 50/30µm DVB/CAR/PDMS, Metal Alloy (2cm), needle size 23 ga, Autosampler, pk of 1 ×, plain gray hub