Modelling of adsorption kinetics and calibration curves of gaseous volatile organic compounds with adsorptive solid-phase microextraction fibre: toluene and acetone for indoor air applications.

Modelling of adsorption kinetics and calibration curves of gaseous volatile organic compounds with adsorptive solid-phase microextraction fibre: toluene and acetone for indoor air applications.

Analytical and bioanalytical chemistry (2008-08-01)

Pierre Mocho, Jérôme Nicolle, Valérie Desauziers

摘要

Solid-phase microextraction (SPME) with adsorptive Carboxen/PDMS fibre is a powerful sampling device for volatile organic compounds (VOCs) at trace levels in air. However, owing to competitive adsorption, quantification remains a challenging task. In this area, a theoretical model, based on Fick's laws and an extended Langmuir equation, is proposed to deal with the adsorption kinetics of acetone/toluene mixture on SPME fibre under various static extraction conditions. The semipredictive model is first used to determine the axial diffusion coefficients of analytes in the sampling device. The model is then tested with a complex VOC mixture, showing good agreement with experimental data.

材料

产品编号

品牌

产品描述

57298-U

Supelco

SPME萃取头组件, 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 23 ga, Autosampler, pk of 3, plain gray hub

57348-U

Supelco

SPME萃取头组件, 50/30µm DVB/CAR/PDMS, StableFlex (2cm), needle size 24 ga, Autosampler, pk of 3, notched gray hub

57328-U

Supelco

SPME萃取头组件, 50/30µm DVB/CAR/PDMS, StableFlex (1cm), needle size 24 ga, Manual Holder, pk of 3, plain gray hub

57299-U

Supelco

SPME萃取头组件, 50/30µm DVB/CAR/PDMS, StableFlex (2cm), needle size 23 ga, Autosampler, pk of 3, notched gray hub

57329-U

Supelco

SPME萃取头组件, 50/30µm DVB/CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, plain gray hub

20358

Supelco

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

20355

Supelco

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

25467

Supelco

Carboxen^®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

10478-U

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 1000, 60-80 mesh, bottle of 10 g

57318

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 24 ga, Manual Holder, pk of 3, black hub

25461

Supelco

Carboxen^® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm

57319

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, black hub

57295-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 85 μm CAR/PDMS, StableFlex (1 cm), needle size 23 ga, Autosampler, pk of 3, light blue hub

24246

Supelco

Carboxen^®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

57334-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 85 μm CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Manual Holder, pk of 3, light blue hub

57335-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 85 μm CAR/PDMS, StableFlex (1 cm), needle size 24 ga, Autosampler, pk of 3, light blue hub

23446-U

Supelco

ORBO^™-93吸附管, ORBO tube I.D. × L 6 mm × 95 mm, Bed A 180 mg, Bed B 90 mg, 60/80 mesh, pkg of 25 ea

57343-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 23 ga, Autosampler, pk of 3, black hub

24241-U

Supelco

Carboxen^® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm

57344-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 75 μm CAR/PDMS, Fused Silica (1 cm), needle size 23 ga, Manual Holder, pk of 3, black hub

28718-U

Supelco

Tenax^® TA/Carboxen^® 1018, glass TD tube, preconditioned, O.D. × L 1/4 in. × 3 1/2 in., Sealed with (Swagelok^® End-Fittings), pkg of 10 ea

10471

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 1003, 40-60 mesh, bottle of 10 g

54294-U

Supelco

Carboxen^® 572 for Tobacco Smoke, Adsorbent Bed Wt: 300 mg, cartridge size 3 mL, pkg of 50 ea

10269

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 569, 20-45 mesh, bottle of 10 g

54041-U

Supelco

Carboxen^® 1000 双向固相萃取管, 200 mg/mL, pk 30

11072-U

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 572, 20-45 mesh, bottle of 10 g

10477-U

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 1000, 40-60 mesh, bottle of 50 g

57906-U

Supelco

SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), 85 μm CAR/PDMS, Metal Alloy (1 cm), needle size 23 ga, Autosampler, pk of 1, light blue hub

11048-U

Supelco

Carbopack^®吸附剂, matrix Carboxen^® 569, 20-45 mesh, bottle of 500 g

29534-U

Supelco

Carboxen^® 569, glass TD tube, fritted, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea