Application of static liquid-phase microextraction to the analysis of organochlorine pesticides in water

Zhao, Limian; Lee, Hian Kee

doi:10.1016/s0021-9673(01)00816-0

Cited by 184 publications

(72 citation statements)

References 13 publications

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“…Like HS-SPME, HS-LPME is a process dependent on equilibrium [15]. The procedure requires a period of time for equilibrium.…”

Section: Extraction Timementioning

confidence: 99%

“…Similar to SPME, there are two modes of LPME sampling: direct LPME and headspace LPME (HS-LPME). The direct extraction mode has been successfully used for the determination of polycyclic aromatic hydrocarbons (PAHs) [13], organochlorine pollutants [14][15][16], nitroaromatic explosive [12,17], triazine herbicides [18], cocaine and cocaine metabolites [19] so far. Although the headspace extraction mode was first reported in 2000 [20], recently Theis et al [21] described detailed kinetic studies of headspace mode.…”

Section: Introductionmentioning

confidence: 99%

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Headspace liquid-phase microextraction of trihalomethanes in drinking water and their gas chromatographic determination

Zhao

Lao

2004

Talanta

108

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In the present work, a novel method for the determination of trihalomethanes (THMs) such as chloroform, dichlorobromomethane, chlorodibromomethane and bromoform in drinking water has been described. It is based on coupling headspace liquid-phase microextraction (HS-LPME) with gas chromatography-electron capture detector (GC-ECD). A microdrop of organic solvent at the tip of a commercial microsyringe was used to extract analytes from aqueous samples. Three organic solvents-xylene, ethylene glycol and 1-octanol-were compared and 1-octanol was the most sensitive solvent for the analytes. Extraction conditions such as headspace volume, extraction time, stirring rate, content of NaCl and extraction temperature were found to have significant influence on extraction efficiency. The optimized conditions were 15 ml headspace volume in a 40 ml vial, 10 min extraction time and 800 rpm stirring rate at 20 • C with 0.3 g ml −1 NaCl. The linear range was 1-100 g l −1 for THMs. The limits of detection (LODs) ranged from 0.15 g l −1 (for dichlorobromomethane and chlorodibromomethane) to 0.4 g l −1 (for chloroform); and relative standard deviations (RSD) for most of THMs at the 10 g l −1 level were below 10%. Real samples collected from tap water and well water were successfully analyzed using the proposed method. The recovery of spiked water samples was from 101 to 112%.

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“…Like HS-SPME, HS-LPME is a process dependent on equilibrium [15]. The procedure requires a period of time for equilibrium.…”

Section: Extraction Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Headspace liquid-phase microextraction of trihalomethanes in drinking water and their gas chromatographic determination

Zhao

Lao

2004

Talanta

108

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show abstract

“…Extraction time has a positive sign, so 15 min is better than 5 min for the extraction. Like SPME, liquidliquid micro-extraction procedures are processes dependent on equilibrium rather than exhaustive extraction (Zhao & Lee, 2001;Tor & Aydin, 2006). The amount of analyte extracted at a given time depends upon the mass transfer of analyte from the aqueous phase to the organic solvent phase.…”

Section: Water Analysismentioning

confidence: 99%

Analytical Methods for Viable and Rapid Determination of Organochlorine Pesticides in Water and Soil Samples

Özcan¹,

Tor²,

Aydın³

2011

Pesticides - Strategies for Pesticides Analysis

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“…Direct LPME technique has been successfully used for the analysis of polycyclic aromatic hydrocarbons (PAHs), 9 organochlorine pollutants, [10][11][12] nitroaromatic explosive 13,14 and so on. However, to our knowledge, there is no report on the determination of chloroform in drinking water samples using the direct LPME mode.…”

mentioning

confidence: 99%

Application of Liquid-Phase Microextraction and Gas Chromatography-Mass Spectrometry for the Determination of Chloroform in Drinking Water

et al. 2006

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Application of static liquid-phase microextraction to the analysis of organochlorine pesticides in water

Cited by 184 publications

References 13 publications

Headspace liquid-phase microextraction of trihalomethanes in drinking water and their gas chromatographic determination

Headspace liquid-phase microextraction of trihalomethanes in drinking water and their gas chromatographic determination

Analytical Methods for Viable and Rapid Determination of Organochlorine Pesticides in Water and Soil Samples

Application of Liquid-Phase Microextraction and Gas Chromatography-Mass Spectrometry for the Determination of Chloroform in Drinking Water

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