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  • A new approach for diffusive sampling based on SPME for occupational exposure assessment.

A new approach for diffusive sampling based on SPME for occupational exposure assessment.

Journal of occupational and environmental hygiene (2013-01-30)
P Marín, J F Periago, C Prado
ABSTRACT

Passive sampling is a well-established methodology for the evaluation of exposures to environmental volatile organic compounds (VOCs). The solid-phase microextraction (SPME) technique is a reliable means of sampling VOCs in air. SPME is also being applied as a passive sampler to determine time-weighted average exposure. The use of SPME as a diffusive sampler was evaluated. The passive sampler is based on the use of a cylindrical diffusion cell (porous hydrophobic polyethylene) with an 80 μm carboxen/polydimethylsiloxane fiber to obtain radial diffusion of the analytes to the sorbent. Standard atmospheres of organic vapors in air were used to determine the experimental uptake rates for toluene and chlorobenzene. Toluene concentrations between 2 and 38 mg/m(3) with sampling times between 15 and 60 min were evaluated, as well as chlorobenzene concentrations between 2 and 47 mg/m(3) with sampling times between 30 and 60 min. The mean diffusive uptake rate was 2.14 mL/min for toluene and 2.57 mL/min for chlorobenzene, and no statistical significant effects of concentration and sampling time were observed under the studied conditions for the two compounds. Relative standard deviation ranged from 2.6 to 6.5%. The performance of the sampler under varying concentrations of toluene was also tested, showing that the sampler reflects the average exposure concentration. Effects of temperature, relative humidity, velocity of the air, back diffusion, competitive adsorption, and the stability of chlorobenzene in the sampler were also studied. Sampler behavior was tested in gas stations, and the results were successfully compared with a 3M-3500 diffusive sampler. The results are promising for using this new SPME device for diffusive monitoring for occupational exposure assessment.

MATERIALS
Product Number
Brand
Product Description

Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
Pricing and availability is not currently available.
Supelco
Toluene solution, certified reference material, 5000 μg/mL in methanol
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), needle size 24 ga, StableFlex
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available.
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Pricing and availability is not currently available.
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available.
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 563, 20-45 mesh, bottle of 10 g
Pricing and availability is not currently available.
Sigma-Aldrich
Chlorobenzene, anhydrous, 99.8%
Pricing and availability is not currently available.
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, pack of 144 × 290 mg
Pricing and availability is not currently available.
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Pricing and availability is not currently available.
Supelco
Chlorobenzene, analytical standard
Pricing and availability is not currently available.
Sigma-Aldrich
Chlorobenzene, SAJ special grade, ≥99.5%
Pricing and availability is not currently available.
Sigma-Aldrich
Chlorobenzene, SAJ first grade, ≥99.0%
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, for use with autosampler, needle size 23 ga, metal alloy fiber
Pricing and availability is not currently available.
Supelco
SPME fiber assembly Divinylbenzene/Carboxen/Polydimethylsiloxane (DVB/CAR/PDMS), for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 1 cm
Pricing and availability is not currently available.