title: Cadmium(II)-based metal-organic nanotubes as solid-phase microextraction coating for ultratrace-level analysis of polychlorinated biphenyls in seawater samples.
abstract: In this study, stable cadmium(II)-based metal-organic nanotubes (Cd-MONTs) were prepared and used as a coating material for solid-phase microextraction (SPME) of polychlorinated biphenyls (PCBs) from environmental water samples. The as-prepared Cd-MONT SPME coating material was characterized by thermal gravimetric analysis, scanning electron microscopy, and X-ray diffraction. The synthesized Cd-MONTs exhibited high thermal stability (385 °C) and excellent extraction performance toward PCBs. The important conditions were optimized systematically by the response surface method. Under the optimal conditions, the new fiber achieved high enrichment factors (938-3417), low limits of detection (1.80-8.73 pg L-1), and wide linearity (10-5000 pg L-1). The method developed was used in ultratrace-level analysis of PCBs in seawater samples, with satisfactory results for each sample.
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Analysis and Test Centre, Shandong Academy of Sciences, Jinan, 250014, China.|College of Food Science and Engineering, Shandong Agricultural University, Taian, 271018, China.
authors.forename: Wan-Ru
authors.initials: WR
authors.lastname: Sheng
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Analysis and Test Centre, Shandong Academy of Sciences, Jinan, 250014, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Analysis and Test Centre, Shandong Academy of Sciences, Jinan, 250014, China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Wang
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Analysis and Test Centre, Shandong Academy of Sciences, Jinan, 250014, China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Wang
authors.affiliation: College of Food Science and Engineering, Shandong Agricultural University, Taian, 271018, China. mlwang@sdau.edu.cn.
authors.forename: Ming-Lin
authors.initials: ML
authors.lastname: Wang
authors.affiliation: Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Analysis and Test Centre, Shandong Academy of Sciences, Jinan, 250014, China. zhaors1976@126.com.
authors.forename: Ru-Song
authors.initials: RS
authors.lastname: Zhao
keywords: Gas chromatography–tandem mass spectrometry; Metal–organic nanotubes; Polychlorinated biphenyls; Solid-phase microextraction; Water samples