Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Microcolumn"”.
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Field sampling and microcolumn preconcentration techniques in inductively coupled plasma spectrometry.
… The technique utilises activated alumina microcolumns in a flow injection (FI) system, to perform analyte enrichment and matrix removal. The analytes, after retention on the microcolumn are subsequently eluted and quantified by inductively coupled plasma-emission spectrometry …
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The preparation of porous microcolumn arrays of silicon, and post-ionization of neutral particles from DIOS-MS
… with laser irradiation was developed to produce microcolumn arrays on Si surfaces as a matrix-free DIOS-MS substrate. These surfaces have longer storage times, and are more damage-resistant to repeated laser exposure during DIOS-MS experiments than porous Si surfaces formed by galvanostatic …
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Control of micro- and nanostructure: I. polymer gas chromatography microcolumns and II. applications of ultrasound
… a new method to produce gas chromatography (GC) microcolumns with a polymer substrate. The second part of this thesis concerns the use of ultrasonic nebulization of solutions and suspensions both to produce unique nanostructured materials and to aid the study of nanomaterials. The first chapter …
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Field sampling and flow injection strategies for trace analysis and element speciation.
… on sulphydryl cotton and after elution from the microcolumn, separation and quantitation of methyl-, ethyl- and inorganic mercury species. Method development experiments were performed using a derivatisation technique which gave low contamination and allowed rapid analysis of samples. The …
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Silicone microspheres and disposable separation technology for gaseous analytes
… for analyzing complex gas mixtures. Typical GC microcolumns are made through a multi-step fabrication process, which requires hazardous reagents, complex equipment, and problematic stationary phase coating procedures. This section of the thesis explores, as an alternative: a microcolumn made …
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ΣΥΣΧΕΤΙΣΕΙΣ ΤΙΜΩΝ ΑΙΜΟΣΦΑΙΡΙΝΗΣ Α1(HBA1) ΚΑΙ ΠΟΛΛΑΠΛΩΝ ΠΡΟΣΔΙΟΡΙΣΜΩΝ ΓΛΥΚΟΖΗΣ ΑΙΜΑΤΟΣ ΝΗΣΤΕΙΑΣ ΕΠΙ ΣΑΚΧΑΡΩΔΟΥΣ ΔΙΑΒΗΤΟΥ ΟΨΙΜΟΥ ΕΝΑΡΞΕΩΣ
… A1 (HBA1) BY CATION EXCHANGE RESIN METHOD USING MICROCOLUMN WAS CARRIED OUT IN 107 MATURITY ONSET DIABETICS ATTENDING THE OUT PATIENT DIABETIC CLINIC OF EVANGELISMOS HOSPITAL. THE PATIENTS ACCORDING TO THEIR TREATMENT WERE DIVIDED IN THREE GROUPS: GROUP A UNDER INSULIN (24 PATIENTS), GROUP B ON …
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Evaluation of techniques for ABO isoagglutinin titer
… test(IAT) were done for the tube test and the microcolumn agglutinin test(gel test) and then FCM was done by using anti-IgM and anti-IgG. In the case of FCM, mean fluorescence intensity ratio(MFIR) was calculated and cut-off level were obtained. There was a significant difference in titers at …
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Strategies for the analytical determination of thermally labile sulfur-containing environmental pollutants
… supercritical fluid chromatography (SFC) and microcolumn high performance liquid chromatography (micro-HPLC). The packed column SFC/SCD system was shown to be compatible with both pure CO₂ and methanolmodified CO₂ mobile phases with a detector sensitivity (2 pg S/sec.) comparable to that found …