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

ZUSAMMENFASSUNG

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

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

57348-U

Supelco

SPME-Faseranordnung Divinylbenzol/Carboxen/Polydimethylsiloxan (DVB/CAR/PDMS), needle size 24 ga, StableFlex

57298-U

Supelco

SPME-Faseranordnung Divinylbenzol/Carboxen/Polydimethylsiloxan (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler

57328-U

Supelco

SPME-Faseranordnung Divinylbenzol/Carboxen/Polydimethylsiloxan (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder

20358

Supelco

ORBO^™ Carboxen-564 Röhrchen, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)

57299-U

Supelco

SPME-Faseranordnung Divinylbenzol/Carboxen/Polydimethylsiloxan (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm

57329-U

Supelco

SPME-Faseranordnung Divinylbenzol/Carboxen/Polydimethylsiloxan (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler

20355

Supelco

ORBO^™ 78 HBr auf Carboxen^® 564 speziell gereinigt (20/45), 400/200 mg, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea

28283-U

Supelco

Carbotrap^® 300, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea

57318

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga

25467

Supelco

Carboxen^®-1010 PLOT Kapillar-GC-Säule, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

10478-U

Supelco

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

28686-U

Supelco

FLM Carbopack^™ X TD-Röhrchen aus deaktiviertem Edelstahl, preconditioned, pkg of 10 tubes, O.D. × L 1/4 in. (6.35 mm) × 3 1/2 in. (89 mm)

25461

Supelco

Carboxen^®-1006 PLOT Kapillar-GC-Säule, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

57335-U

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler

57295-U

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler

57319

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler

20273

Supelco

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

24246

Supelco

Carboxen^®-1010 PLOT Kapillar-GC-Säule, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

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

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber

57343-U

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (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

10257

Supelco

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

10258

Supelco

Carbopack^™ Adsorbens, matrix Carbopack^™ C, 80-100 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^®-Adsorbens, matrix Carbotrap^® B, 20-40 mesh, bottle of 10 g

57344-U

Supelco

SPME-Faseranordnung Carboxen/Polydimethylsiloxan (CAR/PDMS), d_f 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder

24241-U

Supelco

Carboxen^®-1006 PLOT Kapillar-GC-Säule, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

11072-U

Supelco

Carboxen^® Adsorptionsmittel, matrix Carboxen^® 572, 20-45 mesh, bottle of 10 g

10436

Supelco

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