Search Results - "Velthorst, N.H."

Determination of the anticancer drug metabolite WR1065 using pre-column derivatization and diode laser induced fluorescence detection by Mank, A.J.G., Molenaar, E.J., Gooijer, C., Lingeman, H., Velthorst, N.H., Brinkman, U.A.Th

“…A liquid chromatographic (LC) procedure using alumina as stationary phase in both the pre- and the analytical column, is reported for the determination of…”
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Laser-based non-fluorescence detection techniques for liquid separation systems by de Beer, T, Velthorst, N.H, Brinkman, U.A.Th, Gooijer, C

“…Over the last two decades, the possibility to use lasers for detection purposes in column liquid chromatography (LC) and capillary electrophoresis (CE)…”
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Coupling of column liquid chromatography and surface-enhanced resonance Raman spectroscopy via a thin-layer chromatographic plate by Somsen, G.W., Coulter, S.K., Gooijer, C., Velthorst, N.H., Brinkman, U.A.Th

“…Surface-enhanced resonance Raman (SERR) spectroscopy was used to characterize compounds separated by column liquid chromatography (LC). Three percent of the…”
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Identification of herbicides in river water using on-line trace enrichment combined with column liquid chromatography-Fourier-transform infrared spectrometry by Somsen, G.W., Jagt, I., Gooijer, C., Velthorst, N.H., Brinkman, U.A.Th, Visser, T.

“…Trace enrichment of herbicides on a 10×2.0 mm I.D. precolumn packed with Polygosil C 18 material, was combined on-line with column liquid…”
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Coupling of column liquid chromatography and Fourier transform infrared spectrometry by Somsen, G.W., Gooijer, C., Velthorst, N.H., Brinkman, U.A.Th

“…This paper provides an extensive overview of the literature on the coupling of column liquid chromatography (LC) and Fourier transform infrared spectrometry…”
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Determination of phenprocoumon in plasma and urine using at-line solid-phase extraction-capillary electrophoresis by Veraart, J.R., Gooijer, C., Lingeman, H., Velthorst, N.H., Brinkman, U.A.Th

“…The use of capillary electrophoresis (CE) for the analysis of biological samples is rather problematic because of the large number of interferences present in…”
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On the coupling of fluorescence line-narrowing spectroscopy and poly(ethylene)imine-cellulose thin-layer chromatography by Kok, S.J., Evertsen, R., Velthorst, N.H., Brinkman, U.A.Th, Gooijer, C.

“…The feasibility of a direct coupling of the low-temperature, high-resolution, fluorescence line-narrowing spectroscopy (FLNS) technique and the…”
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Identification of stereoisomeric benzo[ a]pyrene tetrols by reversed-phase liquid chromatography coupled semi-ondashline to fluorescence line-narrowing spectroscopy by Kok, S.J., Posthumus, R., Bakker, I., Gooijer, C., Brinkman, U.A.Th, Velthorst, N.H.

“…A low-temperature laser-based fluorescence technique, i.e., fluorescence line-narrowing (FLN) was used for the identification of four stereoisomeric benzo[…”
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Near-infrared laser-induced fluorescence detection in column liquid chromatography. A comparison of various lasers and detection systems I. Continuous wave lasers by Mank, A.J.G., Velthorst, N.H., Brinkman, U.A.Th, Gooijer, C.

“…Several lasers, i.e. HeNe lasers, diode lasers and an argon-ion-dye laser combination, are compared as excitation sources for near-infrared laser-induced…”
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Near-infrared laser-induced fluorescence detection in column liquid chromatography. A comparison of various lasers and detection systems II. Pulsed lasers by Mank, A.J.G., Velthorst, N.H., Brinkman, U.A.Th, Gooijer, C.

“…The applicability of two pulsed lasers, a XeCl-excimer/dye laser and a Nd:YAG/dye laser combination, as excitation sources for near-infrared (NIR)…”
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Fluorescence line-narrowing spectroscopy of analytes deposited on thin-layer chromatography plates by Kok, S.J., Bakker, I., Gooijer, C., Brinkman, U.A.Th, Velthorst, N.H.

“…The sensitivity and potential robustness of fluorescence line-narrowing spectroscopy (FLNS) coupled with column liquid chromatography (LC) in a semi-on-line…”
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Laser-induced fluorescence detection of native-fluorescent analytes in column liquid chromatography, a critical evaluation by van de Nesse, R.J., Velthorst, N.H., Brinkman, U.A.Th, Gooijer, C.

“…This paper critically evaluates aspects that need to be considered when applying lasers instead of conventional lamps in fluorescence detection combined with…”
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Forward-scattering degenerate four-wave mixing as a potential laser-based absorption detection method in liquid separation systems: Coupling to conventional-size liquid chromatography by de Beer, T., Hoornweg, G.Ph, Grootendorst, G.J., Velthorst, N.H., Gooijer, C.

“…An explorative study on the compatibility of liquid separation systems, such as (micro) liquid chromatography (LC) and capillary electrophoresis (CE), and…”
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Near-i.r. fluorescent labels for determination of functional groups in polymeric materials by Hofstraat, J.W., van Houwelingen, G.D.B., Schotman, A.H.M., Nuijens, M.J., Gooijer, C., Velthorst, N.H., Strekowski, L., Patonay, G.

“…Cyanine-based near-i.r. fluorescent probes have been applied as labels to determine functional groups in polymeric materials. The advantage of such probes is…”
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A cyanine fluorophore with a hydrazide functionality as labelling reagent for aldehydes in liquid chromatography by Nuijens, M.J., Zomer, M., Mank, A.J.G., Gooijer, C., Velthorst, N.H., Hofstraat, J.W.

“…A new hydrazide derivative of a cyanine dye is synthesized for the chemical derivatization of aldehydes. With this red absorbing fluorophore it is possible to…”
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Improvements in environmental trace analysis by GC-IR and LC-IR by Visser, T., Vredenbregt, M.J., de Jong, A.P.J.M., Somsen, G.W., Hankemeier, Th, Velthorst, N.H., Gooijer, C., Brinkman, U.A.Th

“…Research has been carried out to enlarge the potential of infrared (IR) spectrometry as a detector in gas and liquid chromatography (GC and LC). The study has…”
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Immobilized fluorophores in dynamic chemiluminescence detection of hydrogen peroxide by Gubitz, Gerald, Van Zoonen, Piet, Gooijer, Cees, Velthorst, Nel H, Frei, Roland W

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Lanthanide luminescence quenching as a detection method in ion chromatography. Chromate in surface and drinking water by Schreurs, M, Somsen, G W, Gooijer, C, Velthorst, N H, Frei, R W

“…Dynamic quenching of Eu(III) and Tb(III) luminescence by inorganic anions as a detection method in ion chromatography was investigated. To obtain a high…”
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At-line solid-phase extraction for capillary electrophoresis: application to negatively charged solutes by Veraart, J.R, Gooijer, C, Lingeman, H, Velthorst, N.H, Brinkman, U.A.Th

“…The analysis of complex biological samples with capillary electrophoresis (CE) requires proper sample pretreatment. In this paper the applicability of…”
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Sensitized room-temperature phosphorescence for detection in continuous flow and chromatographic systems by Donkerbroek, J. J., van Eikema Hommes, N. J. R., Gooijer, C., Velthorst, N. H., Frei, R. W.

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