Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

Use of solid-phase extraction in the determination of benzene, toluene, ethylbenzene, xylene and cumene in spiked soil and investigation of soil spiking methods

Meney, K M and Davidson, C M (1998) Use of solid-phase extraction in the determination of benzene, toluene, ethylbenzene, xylene and cumene in spiked soil and investigation of soil spiking methods. Analyst, 123 (2). pp. 195-200. ISSN 0003-2654

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

A method has been developed for the determination of benzene, toluene, ethylbenzene, xylene and cumene (BTEXC) in soils, based on methanol extraction, solid-phase extraction (SPE) of the diluted extract and gas chromatography. Quantitative recoveries of BTEXC were obtained from methanol extracts provided the solvent composition was adjusted to methanol-water (50 + 50) prior to SPE, and care was taken to avoid the development of headspace into which analytes could partition, Cartridge (500 mg) load volumes of up to 20 ml of methanol-water extract were possible for all the analytes, except benzene (7 ml), without significant loss due to volatilization. The minimum elution volume for 100% removal of the analytes from the SPE cartridge was 1.5 ml of dichloromethane, It was possible to recover >90% of analytes added as a concentrated methanolic solution to a dry, clay soil, but the recoveries decreased if field-moist soil was used and if the soil was spiked with petrol, Recoveries were also reduced if the soil and spiking solution were left in contact for extended periods (as would occur in the event of a real contaminant spillage), Over a 17 d period, more than 30% of the BTEXC added to a soil as a dilute solution in methanol-water (50 + 50) became too tightly bound for removal by a single aliquot of extractant, When the method of vapour fortification was used to produce performance evaluation materials, both uptake of BTEXC and stability of the analyte concentrations after spiking were found to depend strongly on the soil type.