title: Samplers for VOCs in air based on cyclodextrin-silica hybrid microporous solid phases.
abstract: Samplers for VOCs in air based on cyclodextrin-silica hybrid microporous solid phases are proposed. The solid phase preparation is very easy and inexpensive. Proposed samplers compared with other solid phases present the advantages of a wider range of operative conditions for VOCs desorption. Samplers are tested based on results for the determination of benzene, toluene, ethylbenzene and o-xylene, m-xylene and p-xylene (BTEX) in air. Operational parameters are optimized and quantitative recovery is obtained using a solid phase from 2-hydroxypropyl-β-cyclodextrin and acetonitrile as the extraction solvent. The recoveries obtained are 89 ± 4%, 90 ± 6%, 91 ± 2%, 87.0 ± 0.9%, 88 ± 4%, and 88 ± 4% for benzene, toluene, ethylbenzene, o-xylene, m-xylene and p-xylene, respectively. Moreover results indicate a good reproducibility with a coefficient of variation below 6% and no significant difference between the reproducibility intra-synthesis and inter-synthesis. The proposed procedure has been applied to the determination of BTEX in several contaminated air samples and compared with results provided by a reference method.
authors.affiliation: Departament de Química Analítica, Facultat de Química, Universitat de València, Dr Moliner 50, 46100 Burjassot, València, Spain. adela.mauri@uv.es
authors.forename: Adela R
authors.initials: AR
authors.lastname: Mauri-Aucejo
authors.forename: Maria
authors.initials: M
authors.lastname: Llobat-Estellés
authors.forename: Mireia
authors.initials: M
authors.lastname: Gómez Egea
authors.forename: Carmen
authors.initials: C
authors.lastname: Guillem
authors.forename: Pedro
authors.initials: P
authors.lastname: Amorós