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Merck
  • 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
摘要

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).

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radiello 小柱吸附剂, 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 三角支撑板, pk of 20
radiello 扩散体外壳, white, configured for general use, pk of 20
radiello 小柱吸附剂, for sampling Aldehydes, matrix SS net with 2,4-DNPH coated FLORISIL®, pk of 20
radiello 小柱吸附剂, for sampling Ammonia (NH3), matrix microporous PE impregnated with phosphoric acid, pk of 20
radiello 扩散体外壳, yellow, configured for reduced sampling rates, pk of 20
radiello 小柱吸附剂, for sampling BTEX and VOCs (thermal desorption), matrix SS net (3 x 8 μm, 4.8 mm diam.), Carbograph, pk of 20
radiello 扩散体外壳, blue, configured for sampling light sensitive compounds, pk of 20
radiello 室外防护罩, pk of 10
Supelco
radiello 亚甲蓝校正标准样,用于 H2S(硫化氢), pkg of 100 mL
radiello 条形码标签, pk of 198
radiello 竖直连接头, threaded for standard use, pk of 20
radiello BTEX/VOC Starter试剂盒,CS2解吸
radiello 小柱吸附剂, for sampling Anaesthetic Gases/Vapors, matrix SS net with mix of mol sieve and activated charcoal (30-50 mesh), pk of 20
radiello BTEX/VOC 起动包,热解吸
Supelco
radiello BTEX 校正套装(热解吸)
radiello 过滤套装, pk of 20
radiello 空储存管, polypropylene (with stopper), volume 12 mL, pk of 100
radiello Starter试剂盒
Supelco
radiello BTEX 校正套装(CS2 解吸)
Radiello 现场温度计, Includes one standard Radiello vertical adapter (RAD122) for each thermometer, configured for standard use, pk of 3
radiello 麻醉气体和蒸气采样器
radiello 空储存管, glass (with stopper), volume 2.8 mL, pk of 100
radiello 夹, suspending Radiello triangular support plate, pk of 20
radiello 1,3-丁二烯起动包,热解吸, pkg of 1 kit (2 RAD141 adsorbing cartridges and barcode labels, 1 RAD1202 yellow diffusive body, 1 RAD121 triangular support plate, 1 instruction sheet)
Radiello 现场温度计, Reader, pk of 1
radiello 扩散体外壳, permeative, configured for anaesthetic gases and vapors, pk of 20
radiello 固定条备件, for use with Radiello Outdoor Shelter, pk of 100