Continuous-flow extraction

J. Roeraade, Automated monitoring of organic trace components in water. I. Continuous flow extraction together with on-line capillary gas cliromatography , 7. Chromatogr. 330 263-274 (1985). [Pg.44]

This is represented by a single well mixed, constant volume, continuous flow extraction stage. [Pg.447]

For the ICP-CFE-D and ICP-CFE-I techniques, the continuous-flow extraction system was coupled directly or indirectly to the membrane interface. Using the indirect technique, the extract was collected in a volumetric flask capped with aluminium foil and... [Pg.142]

Extraction in liquid/liquid segmented flow has been developed. A continuous-flow extraction system coupled online with an RP-HPLC with C-l 8 and a UV detector was used to study the extraction of fenthion and azinphos methyl in water (82). [Pg.746]

A Farran, J De Pablo, S Hernandez. Continuous-flow extraction of organophosphorus pesticides coupled on-line with high-performance liquid chromatography. Anal Chim Acta 212 123-131, 1988. [Pg.758]

Figure 2.16 Chromatograms of a pentane extract of a water sample containing 200 ppb of a naphtha fraction (a) sample extracted by using a continuous flow system, where a pressurized bottle was employed as the sample-delivery system (b) batch-extracted sample. Reprinted from Journal of Chromatography, A 330, J. Roeraade, Automated monitoring of organic trace components in water. I. Continuous flow extraction together with on-line capillary gas chromatography , pp. 263-274, copyrigth 1985, with permission from Elsevier Science.

$Figure 2.16 Chromatograms of a pentane extract of a water sample containing 200 ppb of a naphtha fraction (a) sample extracted by using a continuous flow system, where a pressurized bottle was employed as the sample-delivery system (b) batch-extracted sample. Reprinted from Journal of Chromatography, A 330, J. Roeraade, Automated monitoring of organic trace components in water. I. Continuous flow extraction together with on-line capillary gas chromatography , pp. 263-274, copyrigth 1985, with permission from Elsevier Science.$

I. Continuous flow extraction together with on-line capillary gas chromatography ,... [Pg.45]

Fedotov, P. S., Fitz, W. J., Wermrich, R., Morgenstem, P., and Wenzel, W. W. (2005a). Fractionation of arsenic in soil and sludge samples continuous-flow extraction using rotating coiled columns versus batch sequential extraction. Anal. Chim. Acta 538, 93-98. [Pg.512]

L. Nord and B. Karlberg, Sample Preconcentration by Continuous Flow Extraction with a Flow Injection Atomic Absorption Detection System. Anal. Chim. Acta, 145 (1983) 151. [Pg.406]

K. Backstrom, L. G. Danielsson, and L. Nord, Sample Work-Up for Graphite Furnace Atomic Absorption Spectrometry Using Continuous Flow Extraction. Analyst, 109 (1984) 323. [Pg.417]

The next chapter Is a modeling study of a continuous flow extraction system utilizing ELHs by Reed et al. (107). The authors consider the extraction of a solute which Is trapped In the Inner droplet phase by a chemical reaction. The paper compares predictions of the reversible reaction model of Bunge and Noble (96) to the advancing front model of Ho et al. (90) for a continuous flow ELM extractor. The calculatlonal results show that assuming Irreversible reaction can lead to underdesign of the process under conditions of high solute recovery where the outlet solute concentration Is low. Under these conditions, an exact analytical solution to the reversible reaction model can be obtained. [Pg.21]

Influence of Reaction Reversibility on Continuous-Flow Extraction by Emulsion Liquid Membranes... [Pg.62]

This paper examines theoretically the continuous flow extraction by emulsion globules in which the transferring solute reacts with an internal reagent. The reversible reaction model is used to predict performance. These results are compared with advancing front calculations which assume an Irreversible reaction. A simple criterion which indicates the Importance of reaction reversibility on performance is described. Calculations show that assuming an irreversible reaction can lead to serious underdesign when low solute concentrations are required. For low solute concentrations an exact analytical solution to the reversible reaction problem is possible. For moderate solute concentrations, we have developed an easy parameter adjustment of the advancing front model which reasonably approximates expected extraction rates. [Pg.62]

Figure 1 - Soheraatio diagram of a continuous flow extraction...

Trichlorophenols and 4-nitrophenol, both degradation products of pesticides, together with some pesticides have been extracted with an online continuous-flow extraction in combination with HPLC with UV and MS detection [75]. The enrichment factors were lower than those obtained with online precolumn systems using solid adsorbents, but the LLE suffered less from memory effects. [Pg.420]

Sanki Engineering 1983 Continuous flow extraction and fractionation system. Centrifugal countercurrent chromatograph. Technical Manual CPC-N90 CPC-A90. Sanki Engineering, 50 pp... [Pg.121]

Sample preparation Continuous flow extraction with methanol or diethyl ether... [Pg.722]

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