Purge and trap chromatographic method for the determination of acrylonitrile, chlorobenzene, 1,2-dichloroethane, and ethylbenzene in aqueous samples

Warner, J. Michael.; Beasley, Ronald K.

doi:10.1021/ac00275a045

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…The percent recoveries are lower than those reported in the literature. 35,36 This can be attributed to the fact that commercial purge and trap systems use high purging gas ow rates (normally 40 ml min À1 ) and also use traps consisting of a short length micro-bore tubing packed with the granular form of the adsorbent material. Such traps at the cost of high pressure drops and high power consumptions can provide higher adsorption capacity.…”

Section: Microsystem Evaluationmentioning

confidence: 99%

A purge and trap integrated microGC platform for chemical identification in aqueous samples

Akbar

Narayanan

Restaino

et al. 2014

Analyst

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The majority of current micro-scale gas chromatography (μGC) systems focus on air sampling to detect volatile organic compounds (VOCs). However, purging the VOCs from a water sample using microsystems is an unchartered territory. Various organic compounds used in everyday life find their way to water bodies. Some of these water organic compounds (WOCs) persist or degrade slowly, threatening not just human existence but also aquatic life. This article reports the first micro-purge extractor (μPE) chip and its integration with a micro-scale gas chromatography (μGC) system for the extraction and analysis of water organic compounds (WOCs) from aqueous samples. The 2 cm × 3 cm μPE chip contains two inlet and outlet ports and an etched cavity sealed with a Pyrex cover. The aqueous sample is introduced from the top inlet port while a pure inert gas is supplied from the side inlet to purge WOCs from the μPE chip. The outlets are assigned for draining water from the chip and for directing purged WOCs to the micro-thermal preconcentrator (μTPC). The trapped compounds are desorbed from the μTPC by resistive heating using the on-chip heater and temperature sensor, are separated by a 2 m long, 80 μm wide, and 250 μm deep polydimethylsiloxane (OV-1) coated μGC separation column, and are identified using a micro-thermal conductivity detector (μTCD) monolithically integrated with the column. Our experiments indicate that the combined system is capable of providing rapid chromatographic separation (<1.5 min) for quaternary WOCs namely toluene, tetrachloroethylene (PCE), chlorobenzene and ethylbenzene with a minimum detection concentration of 500 parts-per-billion (ppb) in aqueous samples. The proposed method is a promising development towards the future realization of a miniaturized system for sensitive, on-site and real-time field analysis of organic contaminants in water.

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Section: Microsystem Evaluationmentioning

confidence: 99%

A purge and trap integrated microGC platform for chemical identification in aqueous samples

Akbar

Narayanan

Restaino

et al. 2014

Analyst

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The use of solid sorbents for direct accumulation of organic compounds from water matrices–a review of solid‐phase extraction techniques

Liška¹,

Krupčík

Leclercq

1989

J. High Resol. Chromatogr.

172

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The main principles of solid‐phase extraction techniques are reviewed in this paper. Various solid sorbents can be used as a suitable trap for direct accumulation of organic compounds from aqueous solutions. The trapped analytes can be desorbed by elution with suitably chosen liquid phases. These preconcentration procedures can be considered as low performance liquid chromatography and the efficiency of the procedure can thus be related to the retention characteristics of the preconcentration column. The main sorbents used for trace enrichment purposes are also reviewed. Besides, the concise methodology, sample storage, and automation are discussed. The advantages of solid phase extraction as compared to liquid‐liquid extraction are given as well as some drawbacks of this method.

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Biological monitoring of human exposure to volatile halogenated hydrocarbons using urinalysis with capillary GC-ECD

Jung¹,

Sohn

1992

Arch. Pharm. Res.

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Purge and trap chromatographic method for the determination of acrylonitrile, chlorobenzene, 1,2-dichloroethane, and ethylbenzene in aqueous samples

Cited by 8 publications

References 4 publications

A purge and trap integrated microGC platform for chemical identification in aqueous samples

A purge and trap integrated microGC platform for chemical identification in aqueous samples

The use of solid sorbents for direct accumulation of organic compounds from water matrices–a review of solid‐phase extraction techniques

Biological monitoring of human exposure to volatile halogenated hydrocarbons using urinalysis with capillary GC-ECD

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