Electrodialytic sample treatment coupled on-line with column liquid chromatography for the determination of basic and acidic compounds in environmental samples

Debets, A.J.J.; Hupe, K. P.; Kok, Wim Th.; Brinkman, U.A.Th.

doi:10.1016/0021-9673(92)85544-4

Cited by 24 publications

(11 citation statements)

References 6 publications

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“…Obviously, for an EDIST cell with equal donor and acceptor volumes and b = 0.06 cm, the required residence time for an analyte is about 0.5-1.5 min. These findings are supported by experimental results described previously [19,20]. Using a stagnant accept0f phase and a flowing donor (sample) phase in a home" made electrodialysis cell, the analyte recovery arid enrichment were studied.…”

Section: I T (1 -+ (1 -T;)supporting

confidence: 83%

“…Decreasing the residence time by increasing the donor flow rate to 50 or evO a 75 gl min-1 decreased the analyte recovery. Similar results were obtained for the basic herbicides paraquat and diquat and several sulphonic acids [20]. In this case the optimum donor flow rate in a modified electrodial" ysis block, with a donor compartment volume of 50 pl (donor equals acceptor compartment volume; b = 0.06) was 50 gi min-1…”

Section: I T (1 -+ (1 -T;)supporting

confidence: 81%

“…In actual practice, however, the current will be limited by the heat developed in the set-up, particularly in the ion" exchange membranes, as a result of their relatively higla electric resistance. When the heat production is too high, decomposition of the membranes may occur and gas-bubble formation, due to electrolysis, will disturb the electrodialytic process which has also been observed experimentally [20].…”

Section: (1-t+~)mentioning

confidence: 78%

“…Figure 4 shows the results of simulations of a flowing donor and a stagnant acceptor solution. The geometry of the cell in the simulation study was equal to that of the cell used in practice before [19,20], with a channel height of 0.03 cm for both the donor and acceptor compartment. The analyte was assumed to have a diffusion coefficient of 5 10 -6 cm 2 s -1 and a ionic mobility of 2 10 -4 cm 2 V-1 s-1.…”

Section: Computer Simulationsmentioning

confidence: 99%

“…In previously published studies [19,20] we have shown that electrodialysis can be used in practice as an on-line sample treatment method for LC. With electrodialytiC sample treatment (EDIST), traces of analytes could be enriched from the sample solution.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography

et al. 1994

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Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography. Debets, A.J.J.; van Wier, P.; Brinkman, U.A.Th.; Kok, W.T. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Key WordsColumn liquid chromatography Electrodialytic sample treatment Computer models Analyte enrichment SummaryBasic considerations for analyte enrichment and recovery obtainable by electrodialysis as a sample treatment method are given. Equations are derived which describe the dependence of the concentration profiles of ionic compounds on the electric field strength in a set-up with stagnant donor and acceptor solutions. It is shown that analyte recovery increases when less ion-selective membranes are used in the electrodialysis cell. Computer models are used to estimate the analyte enrichment for a flowing donor (sample) and a stagnant acceptor phase. About 10-fold enrichment can be obtained in an electrodialytic sample treatment system within 20 min under maximum current conditions. A compromise has to be found between analyte recovery and the donor (sample) flow rate.

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Section: I T (1 -+ (1 -T;)supporting

confidence: 83%

Section: I T (1 -+ (1 -T;)supporting

confidence: 81%

Section: (1-t+~)mentioning

confidence: 78%

Section: Computer Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography

et al. 1994

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Pesticides (New Generation) and Related Compounds, Analysis of

PicÃ3¹,

Font²,

MoltÃ3³

et al. 2000

Encyclopedia of Analytical Chemistry

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Miscellaneous pesticides and related compounds include the compounds that can neither be included in the classical chemical category of pesticides nor classified by their class of action. They are a heterogeneous group of substances like macrocyclic lactones, chloronicotinyls, tetranortriterpenoids, ammonium quaternary salts, dinitroanilines, acetamides, oximes, triazoles and pyridine‐based molecules. Their common characteristic is that they are recently developed pesticides. Sample preparations in environmental matrices: air, water, soil, food and biological samples are described. Analytical techniques for characterizing these compounds include gas chromatography (GC), high‐performance liquid chromatography (HPLC), and a wide variety of other emerging techniques such as capillary electrophoresis (CE), supercritical fluid chromatography (SFC), voltammetric and immunoassay techniques. Here, those applied to the field of real samples are presented.

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Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

2010

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Separation techniques, such as electrodialysis, electroextraction, electro-membrane extraction and extraction across phase interfaces, are reviewed and discussed as methods for sample cleanup and preconcentration. This survey clearly shows that electromigration of ionic species across phase interfaces, especially across supported liquid membranes, may be very selective and is strongly dependent on the chemical composition of these interfaces. Thus, electric field-enhanced transport across chemically tailored liquid membranes may open new perspectives in preparative analytical chemistry. This review offers comprehensive survey of related literature and discussion of the topic, which may stimulate interest of experts and practitioners in bioanalysis.

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Electrodialytic sample treatment coupled on-line with column liquid chromatography for the determination of basic and acidic compounds in environmental samples

Cited by 24 publications

References 6 publications

Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography

Theoretical models for electrodialytic sample treatment in trace analysis by liquid chromatography

Pesticides (New Generation) and Related Compounds, Analysis of

Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

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