Headspace in-tube microextraction coupled with micellar electrokinetic chromatography of neutral aromatic compounds

Cho, Sung Min; Park, Bum Su; Jung, Woojin; Lee, Sang Won; Jung, Yun-Hwan; Chung, Doo Soo

doi:10.1016/j.talanta.2015.11.035

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…Nevertheless, the efficiency was still limited by the instability of the hanging drop, especially for long extraction times and elevated temperatures. Recently, these shortcomings were resolved with a novel and quite simple technique, in-tube microextraction (ITME), using a liquid plug in the capillary inlet as an acceptor phase instead of a hanging drop [22,23]. In HS-ITME-CE, the capillary inlet containing the acceptor plug was simply placed in the HS above a sample solution.…”

Section: Introductionmentioning

confidence: 99%

Single bubble in‐tube microextraction coupled with capillary electrophoresis

et al. 2021

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Headspace (HS) extraction is a sample pretreatment technique for volatile and semivolatile organic compounds in a complex matrix. Recently, in-tube microextraction (ITME) coupled with CE using an acceptor plug placed in the capillary inlet was developed as a simple but powerful HS extraction method. Here, we present single bubble (SB) ITME using a bubble hanging to the capillary inlet immersed in a sample donor solution as a HS of submicroliter volume (∼200 nL). The analytes evaporated to the bubble were extracted into the acceptor phase through the capillary opening, then electrophoresis of the enriched extract was carried out. Since the bubble volume was much smaller than a conventional HS volume (∼1 mL), it was filled with the evaporated analytes rapidly and the analytes could be enriched much faster compared to conventional HS-ITME. Owing to the high surface-to-volume ratio of the SB, 5 min SB-ITME yielded the enrichment factor values similar to those of 10 min HS-ITME. When 5 min SB-ITME at room temperature was applied to a tap water sample, the enrichment factors of 2,4,6-trichlorophenol (TCP), 2,3,6-TCP, and 2,6-dichlorophenol were 53, 41, and 60, respectively, and the LOQs obtained by monitoring the absorbance at 214 nm were 5.6-8.3 ppb, much lower than 200 ppb, the World Health Organization guideline for the maximum permissible concentration of 2,4,6-TCP in drinking water.

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Section: Introductionmentioning

confidence: 99%

Single bubble in‐tube microextraction coupled with capillary electrophoresis

et al. 2021

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“…To overcome these limitations, recently, Chung et al. reported a novel in‐tube microextraction (ITME) combined with HS extraction using the liquid in the capillary as an acceptor phase, without forming a drop at the capillary tip. And then, the headspace in‐tube microextraction (HS‐ITME) in‐line coupled with CE has been presented for an analysis of chlorophenols in an aqueous sample.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid‐based headspace in‐tube liquid‐phase microextraction coupled with CE for sensitive detection of phenols

Yue

Lin

et al. 2018

Electrophoresis

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An ionic liquid-based headspace in-tube liquid-phase microextraction (IL-HS-ITLPME) in-line coupled with capillary electrophoresis (CE) is proposed. The method is capable of quantifying trace amounts of phenols in environmental water samples. In the newly developed method, simply by placing a capillary injected with IL in the HS above the aqueous sample, volatile phenols were extracted into the IL acceptor phase in the capillary. After extraction, electrophoresis of the phenols in the capillary was carried out. Extraction parameters such as the extraction time, extraction temperature, ionic strength, volume of the sample solution and IL types were systematically investigated. Under the optimized conditions, enrichment factors for four phenols were from 1510 to 1985. The proposed method provided a good linearity, low limits of detection (below 5.0 ng mL ), and good repeatability of the extractions (RSDs below 6.7%, n = 6). This method was then utilized to analyze two real environmental samples of Xiaoxi Lake and tap water, obtaining acceptable recoveries and precisions. Compared with the usual HS-ITLPME for CE, IL-HS-ITLPME-CE is a simple, low-cost, fast and environmentally friendly pre-concentration technique. This article is protected by copyright. All rights reserved.

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BTEX in the environment: An update on sources, fate, distribution, pretreatment, analysis, and removal techniques

Zhang

Zhou

et al. 2022

Chemical Engineering Journal

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Headspace in-tube microextraction coupled with micellar electrokinetic chromatography of neutral aromatic compounds

Cited by 4 publications

References 33 publications

Single bubble in‐tube microextraction coupled with capillary electrophoresis

Single bubble in‐tube microextraction coupled with capillary electrophoresis

Ionic liquid‐based headspace in‐tube liquid‐phase microextraction coupled with CE for sensitive detection of phenols

BTEX in the environment: An update on sources, fate, distribution, pretreatment, analysis, and removal techniques

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