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  • Development of a versatile, easy and rapid atmospheric monitor for benzene, toluene, ethylbenzene and xylenes determination in air.

Development of a versatile, easy and rapid atmospheric monitor for benzene, toluene, ethylbenzene and xylenes determination in air.

Journal of chromatography. A (2009-10-27)
Francesc A Esteve-Turrillas, Saray Ly-Verdú, Agustín Pastor, Miguel de la Guardia
ABSTRACT

A new procedure for the passive sampling in air of benzene, toluene, ethylbenzene and xylene isomers (BTEX) is proposed. A low-density polyethylene layflat tube filled with a mixture of solid phases provided a high versatility tool for the sampling of volatile compounds from air. Several solid phases were assayed in order to increase the BTEX absorption in the sampler and a mixture of florisil and activated carbon provided the best results. Direct head-space-gas chromatography-mass spectrometry (HS-GC-MS) measurement of the whole deployed sampler was employed for a fast determination of BTEX. Absorption isotherms were used to develop simple mathematical models for the estimation of BTEX time-weighted average concentrations in air. The proposed samplers were used to determine BTEX in indoor air environments and results were compared with those found using two reference methodologies: triolein-containing semipermeable membrane devices (SPMDs) and diffusive Radiello samplers. In short, the developed sampling system and analytical strategy provides a versatile, easy and rapid atmospheric monitor (VERAM).

MATERIALS
Product Number
Brand
Product Description

Supelco
radiello BTEX Calibration Kit (Thermal Desorption)
radiello BTEX/VOC Starter Kit, CS2 Desorption
radiello Diffusive Bodies, white, configured for general use, pk of 20
radiello Diffusive Bodies, blue, configured for sampling light sensitive compounds, pk of 20
Supelco
radiello Methylene Blue Calibration Standard for H2S (Hydrogen Sulfide), pkg of 100 mL
radiello Empty Storage Tubes, glass (with stopper), volume 2.8 mL, pk of 100
Supelco
radiello Aldehyde Calibration Standard, 50 μg/mL each component in acetonitrile, pkg of 10 mL
radiello BTEX/VOC Starter Kit, Thermal Desorption
radiello Diffusive Bodies, yellow, configured for reduced sampling rates, pk of 20
radiello Diffusive Bodies, permeative, configured for anaesthetic gases and vapors, pk of 20
radiello Empty Storage Tubes, polypropylene (with stopper), volume 12 mL, pk of 100
radiello Clips, suspending Radiello triangular support plate, pk of 20
radiello On-Field Thermometer, Includes one standard Radiello vertical adapter (RAD122) for each thermometer, configured for standard use, pk of 3
radiello Vertical Adapter, threaded for standard use, pk of 20
radiello Cartridge Adsorbents, for sampling BTEX and VOCs (thermal desorption), matrix SS net (3 x 8 μm, 4.8 mm diam.), Carbograph, pk of 20
radiello Cartridge Adsorbents, for sampling Aldehydes, matrix SS net with 2,4-DNPH coated FLORISIL®, pk of 20
radiello Cartridge Adsorbents, for sampling BTEX and VOCs (CS2 Desorption), matrix SS net (100 mesh, 5.8 mm diam.), activated with activated charcoal (30-50 mesh), pk of 20
radiello Barcode Labels, pk of 198
radiello Anesthetic Gases and Vapor Sampler
radiello Cartridge Adsorbents, for sampling Anaesthetic Gases/Vapors, matrix SS net with mix of mol sieve and activated charcoal (30-50 mesh), pk of 20
radiello Triangular Support Plate, pk of 20
radiello Cartridge Adsorbents, for sampling Ammonia (NH3), matrix microporous PE impregnated with phosphoric acid, pk of 20
radiello Outdoor Shelter, pk of 10
radiello Replacement Mounting Strips, for use with Radiello Outdoor Shelter, pk of 100