Packed-column supercritical fluid chromatography coupled with solid-phase extraction for the determination of organic microcontaminants in water

Toribio, Laura; Nozal, Marı́a J.; Bernal, José; Jiménez, Juan J.; Serna, M. L.

doi:10.1016/s0021-9673(98)00300-8

Cited by 20 publications

(10 citation statements)

References 21 publications

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“…Overall, recoveries were somewhat lower than are observed for regulatory methods such as U.S. EPA method 550.1 [29], but were considered acceptable for screening purposes. The low molecular weight compounds (NAPH, ACY, ACE, FLU, and PHEN) had comparable or better recoveries than methods involving preconditioning and cleaning steps [25,41]. Because the low molecular weight compounds are more likely to leach from coal deposits, this selectivity was considered desirable for the analytical objectives of the present study.…”

Section: Resultsmentioning

confidence: 97%

“…VOICE (20%). Toribio et al [25] also reported low recoveries for two of these compounds (BaA and CHRY) and speculated that this was due to incomplete elution from the cartridges. Overall, recoveries were somewhat lower than are observed for regulatory methods such as U.S. EPA method 550.1 [29], but were considered acceptable for screening purposes.…”

Section: Resultsmentioning

confidence: 99%

“…Closed-loop stripping and liquidliquid extraction with evaporative concentration have been widely used, but solidphase extraction (SPE) has become increasingly common since it was first demonstrated for PAHs in surface water samples [24]. Since then, the use of SPE has increased and its effectiveness has been verified [25,26]. This procedure forms the basis for U.S. EPA drinking water method 550.1 and several proposed modifications [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…Many different commercially available SPE columns for PAH extraction currently exist. Toribio et al [25] investigated the use of various conditioned SPE cartridges with packed-column SFC for 35 common contaminants including pesticides, PAHs, and phenols. They found that a styrene divinylbenzene cartridge (Isolute Õ ENVþ SPE) provided some of the best recoveries available, ranging from 34.6 to 105%.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Screening methodology for coal-derived organic contaminants in water

McElmurry

Voice

2004

International Journal of Environmental Analytical Chemistry

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Screening methodology for coal-derived organic contaminants in water

McElmurry

Voice

2004

International Journal of Environmental Analytical Chemistry

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“…In recent literature, various methods for determining napropamide have been proposed such as high‐performance liquid chromatography,11–15 fluorescence16–19 and micelle‐stabilized RTP 20. All of these methods are laborious and time‐consuming for use in routine environmental control laboratories; the most rapid methodology takes at least 10 min for determining napropamide.…”

Section: Introductionmentioning

confidence: 99%

Simple determination of the herbicide napropamide in water and soil samples by room temperature phosphorescence

Salinas-Castillo

Segura‐Carretero

Fernández‐Gutiérrez

2005

Pest Management Science

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A new, simple, rapid and selective phosphorimetric method for determining napropamide is proposed which demonstrates the applicability of heavy-atom-induced room-temperature phosphorescence for analyzing pesticides in real samples. The phosphorescence signals are a consequence of intermolecular protection and are found exclusively with analytes in the presence of heavy atom salts. Sodium sulfite was used as an oxygen scavenger to minimize room-temperature phosphorescence quenching. The determination was performed in 1 M potassium iodide and 6 mM sodium sulfite at 20 degrees C. The phosphorescence intensity was measured at 520 nm with excitation at 290 nm. Phosphorescence was easily developed, with a linear relation to concentration between 3.2 and 600.0 ng ml(-1) and a detection limit of 3.2 ng ml(-1). The method has been successfully applied to the analysis of napropamide in water and soil samples and an exhaustive interference study was also carried out to display the selectivity of the proposed method.

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Supercritical Fluid Chromatography in Clinical Chemistry

Graves

2000

Encyclopedia of Analytical Chemistry

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Supercritical fluid chromatography (SFC) employs a gas taken above its critical temperature and critical pressure to where it forms a supercritical fluid (SF). SFs have properties of both gases and liquids. They have lower densities and viscosities and higher diffusion coefficients than liquids, but they also have the solvating power of a liquid and can dissolve nonpolar and many polar compounds. As such, these favorable properties combine to make SFs an excellent mobile phase for column chromatography. The SFC technique is highly versatile in that it can be used with either packed columns (similar to high‐performance liquid chromatography (HPLC) columns with the same variety of stationary phases available) or open‐tubular columns (similar to gas chromatography (GC) columns and employing the same types of coatings) which can be interfaced with a very wide array of detectors. In addition, SFC avoids high temperatures during the chromatographic separation and in most cases the need to derivatize analyzed compounds. These features make SFC particularly well suited to the separation and assay of clinically important biomolecules. As SFC instruments have become commercially available, numerous applications have been explored in the areas of drug monitoring, toxicology, environmental contaminants, and the measurement of physiological biomolecules. Despite its potential, SFC enjoys limited use in clinical chemistry laboratories currently. Greater efforts are needed to improve sensitivity, standardize and validate assays, and work toward high‐volume throughput capabilities.

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Packed-column supercritical fluid chromatography coupled with solid-phase extraction for the determination of organic microcontaminants in water

Cited by 20 publications

References 21 publications

Screening methodology for coal-derived organic contaminants in water

Screening methodology for coal-derived organic contaminants in water

Simple determination of the herbicide napropamide in water and soil samples by room temperature phosphorescence

Supercritical Fluid Chromatography in Clinical Chemistry

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