Uncertainty Measurement of Chlorophenols and PCBs Analyzed in Aqueous Media by SPME-GC-ECD

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Silva, SL (Author) Other; Alves, A (Author) FEUP; Santos, L (Author) FEUP

Journal

Title: Journal of Chromatographic Science

Vol. 47 No. 2

Pages: 103-109

ISSN: 0021-9665

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 5 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-003-NGV

Abstract (EN): Chlorophenols (CPs) and polychlorinated biphenyls (PCBs) are two of the most important groups of high-priority pollutants, due to their carcinogenicity, toxicity, and mutagenicity. This paper compares the utilization of two solid-phase microextraction (SPME) based extraction procedures, prior to gas chromatography with electron capture detection (GC-ECD), to determine PCBs (PCB 101 and PCB 153) and CPs (2,4,6-TCP and PCP) in aqueous media. Good linearity was observed with the SPME-GC-ECD method for the concentration range studied; detection limits ranged from 0.5 to 1.0 ¿g/L. Repeatability was between 13% and 31 % for the lowest concentration and between 5.6% and 7.8% for the highest concentration. The uncertainty was determined by Thompson and bottom-up approaches. The identification of the compounds was confirmed by GC-MS. The developed procedure has the advantage of simplicity of sample treatment and avoids the use of potentially hazardous organic solvents and the clean-up or pre-concentration steps. Regarding PCBs, this procedure is simpler and faster, but the limits of detection are higher.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7