Determination of Trace Chloroanilines in Environmental Water Samples Using Hollow Fiber-Based Liquid Phase Microextraction

Abstract

A liquid phase microextraction method using hollow fiber to support extraction solvent was developed for enrichment of trace level chloroanilines in environmental water samples. Target analytes, 2-chloroaniline, 3-chloroaniline, 2,3-dichloroaniline, 2,4-dichloroaniline, 3,4-dichloroaniline, and 3,5-dichloroaniline were determined using gas chromatography-flame ionization detector after extraction. Experimental conditions that affect extraction efficiency were investigated and optimized. The proposed method showed a wide linear range from lower lg L -1 to 1,000 lg L -1 , low detection limits (B5.1 lg L -1 ), and reasonable relative standard deviations (RSDs \ 13%). Feasibility of the method was evaluated by analyzing river water samples collected from the Hudson River and the East River in New York City.

Development of counter current salting-out homogenous liquid–liquid extraction for isolation and preconcentration of some pesticides from aqueous samples

“…Recent researches have been oriented towards development of efficient, economical, and miniaturized sample preparation methods. As a result, solid phase microextraction (SPME) [14,15] and liquid phase microextraction (LPME) [16,17] have been developed. Compared to LLE, SPME is a solvent-free process that includes simultaneous extraction and preconcentration of analytes from samples or headspace of the samples.…”

Two-phase/Three-phase Hollow Fibre Liquid-Phase Simultaneous Microextraction Combined with HPLC for Analysis of Phenolic Acids and Flavonoids in Traditional Chinese Medicine

“…A weak acid in acidic donor phase medium, weak alkali in alkaline donor phase medium or neutral substances and compounds with high solubility in a nonpolar organic solvent acceptor phase can be extracted by 2p-HF-LPME. Enriched target analytes in organic or aqueous acceptor phases are directly or indirectly compatible with HPLC [14], gas chromatography (GC) [15,16] or capillary electrophoresis (CE) [17,18] for final chemical analysis.…”

Sensitive determination of chloroanilines in water samples by hollow fiber‐based liquid‐phase microextraction prior to capillary electrophoresis with amperometric detection

“…In recent years, combined with various microextraction approaches many chromatographic methods based on HPLC and GC have been reported for the determination of ANL and its derivatives in environmental samples. In order to purify and concentrate the trace analytes of interest, the sample preparation step in the overall scheme of an analysis becomes critical.…”