Selective determination of semi-volatile thiophene compounds in water by molecularly imprinted polymer thin films with direct headspace gas chromatography sulfur chemiluminescence detection

Water-compatible molecularly imprinted polymer (MIP) thin films are coupled with headspace gas chromatography sulfur chemiluminescence detection (HS-GC-SCD) to create a new approach for the determination of trace concentrations of thiophene compounds in water samples. Thiophene compounds are persist...

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Bibliographic Details
Published in:Analyst (London) 2018-02, Vol.143 (5), p.1117-1123
Main Authors: Hijazi, Hassan Y, Bottaro, Christina S
Format: Article
Language:English
Subjects:
Analytical chemistry
Aquatic animals
Bioaccumulation
Carcinogenicity
Carcinogens
Chemiluminescence
Chromatography
Gas chromatography
Mutagenicity
Pollutants
Polymer films
Polymers
Reproducibility
Seawater
Sulfur
Thin films
Thiophenes
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Summary:Water-compatible molecularly imprinted polymer (MIP) thin films are coupled with headspace gas chromatography sulfur chemiluminescence detection (HS-GC-SCD) to create a new approach for the determination of trace concentrations of thiophene compounds in water samples. Thiophene compounds are persistent, typically petrogenic, organic pollutants of concern due to their potential for biomagnification and bioaccumulation, mutagenicity, and carcinogenicity in terrestrial and aquatic fauna. Identification and quantitation in water, particularly following oil spills, is a priority. Following adsorption of the thiophenes to the MIPs, the MIP-bound analytes are analyzed directly by HS-GC-SCD, with minimal sample manipulation and virtually no organic solvent. Calibration curves of spiked seawater were linear from 5 μg L −1 to 100 μg L −1 and limits of detection (LOD) were in the range of 0.24-0.82 μg L −1 . Low matrix effects were observed in the analysis of thiophene compounds in seawater making the method suitable for use in fresh and saline waters without modification. Acceptable reproducibility was obtained for analysis of thiophene compounds from spiked seawater samples at RSDs ≤7.0% ( n = 3). Water-compatible molecularly imprinted polymer films are coupled with headspace gas chromatography sulfur chemiluminescence detection (HS-GC-SCD) for the determination of thiophenes in water.
ISSN:0003-2654
1364-5528
DOI:10.1039/c7an01686g