A review on the use of packed capillary columns in gas chromatography (GC) is presented. Several articles on the invention of packed capillary columns have been published, as well as on the progress and the development of ...

I denne oppgaven er noen fluorescerende fargestoffer blitt undersøkt som mulige tracerkandidater for sporing av borevæske under kjernetaking i forbindelse med boring av letebrønner for olje. Acridine orange, fluorescein, ...

Oppgaven er en grunnleggende undersøkelse av sol-gel overganger i vandige dispersjoner av Microsilica. Den er delt i tre deler: 1) undersøkelse av Microsilica kolloid- og overflateegenskaper 2) identifisering av parametere ...

A packed capillary column switching system has been developed, suitable for solute focusing of large sample volumes on a short precolumn prior to temperature-programmed elution on an analytical column. The peptides angiotensin ...

ABSTRACT The present work displays capillary liquid chromatographic column switching methodology tailored for fast, sensitive and selective determination of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid ...

I petroleumsindustrien blir tracere blant annet benyttet for å oppnå informasjon om oljereservoarene. Hensikten med denne oppgaven var å undersøke om tetrafenylporfin tetrasulfonsyre (TPPS) kompleksert med ulike metallioner ...

Passiv prøvetagning av tungmetaller i vann er en relativt ny teknikk. I denne oppgaven er metallopptaket i en passiv prøvetager blitt sammenlignet med metallopptaket i en aktiv prøvetager. Formålet med sammenligningen ...

The background for this thesis was to test some of the new column materials and columns in order to find suitable column for quality control of Omnipaque and Visipaque x-ray agent products. Focus was on the columns packed ...

This study has investigated the production of poly(styrene/divinylbenzene) monolithic columns for use in micro LC for protein separations. The 180 µm I.D. x 6 cm poly(styrene/divinylbenzene) monolithic columns were tested ...

A spirane is an orthogonal structure where two rings share one common atom. The spirane framework is rigid, and as a consequence spiranes are potentially useful as rigid frameworks for attachment of coordination functions ...

Målet for denne oppgaven er å beskrive de fysiokjemiske egenskapene til fem forsøksfelt i Norden. Oppgaven er en del av et større internasjonalt prosjekt som omhandler naturlig organisk materiale (NOM) i Norden ...

There is a growing interest in the characterisation of volatile organic compounds (VOCs) in workroom air because of the potentially adverse health effects of these compounds. Volatile organic compounds have intrinsic ...

Two bis (quaternary ammonium bromide) surfactants, hexanediyl-1,6-bis (dimethyldodecylammonium bromide) (12-6-12) and dimethylparaphenyl- a,w-bis(dimethyldodecylammonium bromide) (12-fi-12), were synthesised and their ...

Parts of south-west China are heavily exposed to acid deposition. This is the cause for the IMPACTS (Integrated Monitoring Project on Acidification of Chinese Terrestrial Systems) project, to which this thesis is related. ...

In the present work, pI-separation of proteins by pH-gradient ion-exchange chromatography (IEC) on packed capillary columns is demonstrated. An important technical challenge for adapting this technique to capillary dimensions, ...

The present work reports capillary liquid chromatographic (LC) column switching methodology tailored for sensitive and selective determination of the four phthalic acid monoesters monoethyl phthalate (MEP), monobutyl ...

Stereokjemisk kontroll er svært viktig i organisk kjemi. Med spiraner som utgangspunkt er det forsøkt å syntetisere rigide ligander til asymmetrisk hydrogenering. Bakgrunnen for oppgaven er beskrevet i kapittel 1. I ...