Determination of 13 endocrine disrupting chemicals in environmental solid samples using microwave-assisted solvent extraction and continuous solid-phase extraction followed by gas chromatography–mass spectrometry

• Published in: Analytical and bioanalytical chemistry 2016-01, Vol.408 (1), p.231-241
• Main Authors: Azzouz, Abdelmonaim, Ballesteros, Evaristo
• Format: Article
• Language: English
• Subjects: Agricultural land; agricultural soils; Analytical Chemistry; Biochemistry; Bisphenol A; Characterization and Evaluation of Materials; Chemical properties; Chemistry; Chemistry and Materials Science; detection limit; Disrupting; Endocrine disruptors; endocrine-disrupting chemicals; Extraction (Chemistry); Fluvial sediments; Food Science; Gas chromatography; gas chromatography-mass spectrometry; Identification and classification; Laboratory Medicine; Mass spectrometry; Mathematical analysis; Methods; microwave treatment; Monitoring/Environmental Analysis; Physicochemical properties; Research Paper; rivers; Scientific imaging; Sediments; Sewage sludge; Sludge; Soil (material); solid phase extraction; Solvent extraction; Solvent extraction processes; solvents; Ultrasonic imaging; Water analysis
• ISSN: 1618-2642; 1618-2650
• DOI: 10.1007/s00216-015-9096-1

Soil can contain large numbers of endocrine disrupting chemicals (EDCs). The varied physicochemical properties of EDCs constitute a great challenge to their determination in this type of environmental matrix. In this work, an analytical method was developed for the simultaneous determination of various classes of EDCs, including parabens, alkylphenols, phenylphenols, bisphenol A, and triclosan, in soils, sediments, and sewage sludge. The method uses microwave-assisted extraction (MAE) in combination with continuous solid-phase extraction for determination by gas chromatography–mass spectrometry. A systematic comparison of the MAE results with those of ultrasound-assisted and Soxhlet extraction showed MAE to provide the highest extraction efficiency (close to 100 %) in the shortest extraction time (3 min). The proposed method provides a linear response over the range 2.0 − 5000 ng kg⁻¹ and features limits of detection from 0.5 to 4.5 ng kg⁻¹ depending on the properties of the EDC. The method was successfully applied to the determination of target compounds in agricultural soils, pond and river sediments, and sewage sludge. The sewage sludge samples were found to contain all target compounds except benzylparaben at concentration levels from 36 to 164 ng kg⁻¹. By contrast, the other types of samples contained fewer EDCs and at lower concentrations (5.6 − 84 ng kg⁻¹).