A new adsorbent for trace level organic contaminants

Zlatkis, A.; Ghaoui, L.; Weisner, S.; Shanfield, H.

doi:10.1007/bf02269059

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…This rotorwas almost totally drilled through to give a 4 mm xl.1 mm i.d. hole that can be filled with packing material to obtain the actual micro-precolumn (5). The dimensions of the outlet of the precolumn (6) were 0.6 x 0.4 mm i.d., which were kept so small to have a very low dead volume and to avoid too large differences in i.d.…”

Section: Design Of Switching Valve With Internal Precolumnmentioning

confidence: 99%

“…Several methods have been used for the isolation and trace enrichment of organic compounds from aqueous samples prior to GC analysis, including adsorption on XAD resins or polyurethane foams 11-31, large-bore coated metal columns with subsequent thermal desorption onto a Tenax or charcoal precolumn [4], uncoated capillary columns of various materials such as polyethylene [5], and direct aqueous injection onto bonded phase fused silica capillary columns [6,7]. Mostly, however, liquid-liquid extraction or liquid-solid adsorption followed by off-line elution with an organic solvent [ll-131 has been used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

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Liquid chromatographic trace enrichment with on‐line capillary gas chromatography for the determination of organic pollutants in aqueous samples

Noroozian¹,

Maris²,

Nielen³

et al. 1987

J. High Resol. Chromatogr.

109

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SummaryTrace enrichment for the GC analysis of a series of chlorinated pesticides and polychlorinated biphenyls (PCBs) in aqueous samples has been achieved through a simple on-line technique involving sorption on an LC micro-precolumn followed by direct elution into a gas chromatograph with hexane. A 5-m retention gap coupled to the capillary GC column served as the recipient of a relatively large sample volume (ca. 100 pl) introduced into the GC. Partially concurrent solvent evaporation during sample introduction allowed a large sample capacity.Recoveries of more than 95 YO were observed for the majority of the compounds studied. Using 1.0 ml aqueous samples, detection limits of less than 1 ppt were found. The applicability of the developed method was demonstrated for a river water sample.

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Section: Design Of Switching Valve With Internal Precolumnmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Liquid chromatographic trace enrichment with on‐line capillary gas chromatography for the determination of organic pollutants in aqueous samples

Noroozian¹,

Maris²,

Nielen³

et al. 1987

J. High Resol. Chromatogr.

109

View full text Add to dashboard Cite

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Adsorption/Thermal Desorption with Tenax‐GC for the Collection and Analysis of Polycyclic Aromatic Hydrocarbons and Chlorinated Compounds

Sye

Chang

1989

J Chinese Chemical Soc

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A system for the determination of polycyclic aromatic hydrocarbons(PAHs) and chlorinated compounds. in air by means of adsorption/thermal desorption(AID) with small bed volume (O.lg) Tenax cartridges, followed bycryogenic trap in a V-shaped stainless , steel tube with liquid nitrogen as an appropriate concentration method prior to capillary gas chromatography is described, Recoveries were determined .for the complete ATO method. Desorption recoveries near 100% were found for a variety of chlorinated compounds and polycyclic aromatic bydrocarbons.

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Techniques and procedures for preparation of aquatic samples for chromatographic analyses

Onuska¹

1989

J. High Resol. Chromatogr.

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The measurement of low levels of organic compounds in environmental samples presents the researcher with a number of possible pathways to effectively obtain and analyze samples. Numerous sampling methods, sample preparation techniques, and extraction procedures are available. A number of different approaches to sampling strategy, isolation, concentration, cleanup and fractionation will be discussed. Objectives for collecting environmental samples differ from those for many other types of samples because reliable measurements at very low levels are frequently required. Often, specific analytes need to be measured at the μg/kg and even ng/kg levels in complex matrices. Advances in analytical methodology continue to lower the levels at which reliable measurements can be made. At these levels, many factors that are of little or no concern in other analytical measurements are of critical importance in influencing the outcome and reliability of environmental analyses. Analytical measurements are used for determining the composition and the quantities of analytes in the defined system at various concentration levels. Environmental analytical measurements provide data about the transportation and transformation of an environmental contraminant and for determination of its concentration in a sample.

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A new adsorbent for trace level organic contaminants

Cited by 6 publications

References 8 publications

Liquid chromatographic trace enrichment with on‐line capillary gas chromatography for the determination of organic pollutants in aqueous samples

Liquid chromatographic trace enrichment with on‐line capillary gas chromatography for the determination of organic pollutants in aqueous samples

Adsorption/Thermal Desorption with Tenax‐GC for the Collection and Analysis of Polycyclic Aromatic Hydrocarbons and Chlorinated Compounds

Techniques and procedures for preparation of aquatic samples for chromatographic analyses

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