title: A comparative study between different alternatives to prepare gaseous standards for calibrating UV-Ion Mobility Spectrometers.
abstract: An UV-Ion Mobility Spectrometer is a simple, rapid, inexpensive instrument widely used in environmental analysis among other fields. The advantageous features of its underlying technology can be of great help towards developing reliable, economical methods for determining gaseous compounds from gaseous, liquid and solid samples. Developing an effective method using UV-Ion Mobility Spectrometry (UV-IMS) to determine volatile analytes entails using appropriate gaseous standards for calibrating the spectrometer. In this work, two home-made sample introduction systems (SISs) and a commercial gas generator were used to obtain such gaseous standards. The first home-made SIS used was a static head-space to measure compounds present in liquid samples and the other home-made system was an exponential dilution set-up to measure compounds present in gaseous samples. Gaseous compounds generated by each method were determined on-line by UV-IMS. Target analytes chosen for this comparative study were ethanol, acetone, benzene, toluene, ethylbenzene and xylene isomers. The different alternatives were acceptable in terms of sensitivity, precision and selectivity.
authors.affiliation: Department of Analytical Chemistry, Annex C-3 Building, Campus of Rabanales, Institute of Fine Chemistry and Nanochemistry, University of Córdoba, 14071 Córdoba, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Criado-García
authors.forename: Rocío
authors.initials: R
authors.lastname: Garrido-Delgado
authors.forename: Lourdes
authors.initials: L
authors.lastname: Arce
authors.forename: Miguel
authors.initials: M
authors.lastname: Valcárcel
mesh_terms: D000096:Acetone / Q000032:analysis / Q000737:chemistry; D001554:Benzene / Q000032:analysis / Q000737:chemistry; D001555:Benzene Derivatives / Q000032:analysis / Q000737:chemistry; D002138:Calibration; D000431:Ethanol / Q000032:analysis / Q000737:chemistry; D005740:Gases / Q000032:analysis* / Q000737:chemistry / Q000592:standards; D007477:Ions / Q000737:chemistry; D012015:Reference Standards; D015203:Reproducibility of Results; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods*; D014050:Toluene / Q000032:analysis / Q000737:chemistry; D014466:Ultraviolet Rays; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000737:chemistry / Q000592:standards; D014992:Xylenes / Q000032:analysis / Q000737:chemistry
chemical_list: D001555:Benzene Derivatives; D005740:Gases; D007477:Ions; D055549:Volatile Organic Compounds; D014992:Xylenes; D000096:Acetone; D014050:Toluene; D000431:Ethanol; D001554:Benzene; C004912:ethylbenzene