A facile cooling-assisted solid-phase microextraction device for solvent-free sampling of polycyclic aromatic hydrocarbons from soil based on matrix solid-phase dispersion technique

Shengrui Xu; Huimin Li; Hongwei Wu; Li Xiao; Panlong Dong; Suling Feng; Jing Fan

doi:10.1016/j.aca.2020.04.019

A facile cooling-assisted solid-phase microextraction device for solvent-free sampling of polycyclic aromatic hydrocarbons from soil based on matrix solid-phase dispersion technique

Anal Chim Acta. 2020 Jun 8:1115:7-15. doi: 10.1016/j.aca.2020.04.019. Epub 2020 Apr 12.

Authors

Shengrui Xu¹, Huimin Li², Hongwei Wu³, Li Xiao⁴, Panlong Dong², Suling Feng², Jing Fan⁵

Affiliations

¹ Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution and Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, PR China; Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinlian College, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, PR China. Electronic address: xushengrui@126.com.
² Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Xinlian College, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, PR China.
³ Department of Chemistry, Xinxiang Medical University, Xinxiang, 453000, PR China.
⁴ Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution and Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, PR China.
⁵ Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution and Control, Ministry of Education, School of Environment, Henan Normal University, Xinxiang, 453007, PR China. Electronic address: fanjing@htu.cn.

PMID: 32370871
DOI: 10.1016/j.aca.2020.04.019

Abstract

Solvent-free analysis of organic pollutants from a complex matrix has attracted significant attention. In this work, we designed and fabricated a facile cooling-assisted solid-phase microextraction device (CA-SPME) that could be used for the solvent-free extraction of volatile and semivolatile compounds from a complex matrix using a commercial SPME probe. Determination of polycyclic aromatic hydrocarbons (PAHs) from soil samples was carried out to evaluate the performance of the designed CA-SPME device. The effects of heating temperature, cooling temperature, extraction time, and moisture content in soil on extraction efficiency were investigated. To enhance the extraction efficiency of the targeted analytes, the matrix solid-phase dispersion technique (MSPD) by grinding soil with silica gels was applied. The results showed that grinding with silica gels promoted the release of PAHs from the soil matrix to the headspace by disrupting the matrix structure, which then facilitated the extraction efficiency. Under optimized conditions, for all of the targeted PAHs, the method exhibited good linearity (40-4000 ng g^-1) with regression coefficients (R²) ranging from 0.9586 to 0.9964. The limits of detection and limits of quantification ranged from 4.2 to 8.5 ng g^-1 and 14.0-28.5 ng g^-1, respectively. Relative standard deviations corresponding to the analysis of spiked soil samples (n = 5) were 8.1-13.4%. The solvent-free analysis of the certified soil sample using the proposed method demonstrated satisfactory results.

Keywords: Cooling-assisted solid phase microextraction; Matrix solid phase dispersion; Polycyclic aromatic hydrocarbons; Soil.