Determination of Trace Organic Contaminants by a Novel Mixed-Mode Online Solid-Phase Extraction Coupled to Liquid Chromatography–Tandem Mass Spectrometry
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Media type:
E-Book
Title:
Determination of Trace Organic Contaminants by a Novel Mixed-Mode Online Solid-Phase Extraction Coupled to Liquid Chromatography–Tandem Mass Spectrometry
Description:
In this study, a novel mixed-mode online solid-phase extraction (SPE) method was developed to recover miscellaneous trace organic contaminants (TrOCs) from environmental water samples. Six kinds of sorbents, including C 18 substances, hypercross-linked polymers (2), cation-exchange resins, anion-exchange resins, and modified activated carbons, were packed into a single online SPE cartridge. Furthermore, a fully automated analytic method was established by coupling this mixed-mode online SPE with liquid chromatography tandem mass spectrometry (online SPE-LC-MS/MS). Sixty-nine TrOCs with diverse properties were selected to examine the performance of this mixed-mode SPE cartridge in comparison with solo-mode online SPE cartridges. The limit of quantification (LOQ) and the relative recovery coefficient of TrOCs in diverse water matrices, including groundwater, surface water and sewage effluent were evaluated. The LOQ of most TrOCs was lower than 10 ng L -1 . The relative recovery coefficients for most TrOCs in the groundwater and surface water matrix fit in the satisfactory range. Moreover, mixed-mode online SPE coupled with LC-high-resolution MS was applied for a nontarget screening of TrOCs in sewage effluents. A series of highly polar TrOCs that had scarcely been reported by previous studies were identified by this practical and easily accessible method. Finally, this novel mixed-mode online SPE with LC-MS/MS method was applied to quantify the TrOCs in the environmental water samples