Abstract:
The invention relates to device and a method for isolating, concentrating and/or identifying at least one analyte by retaining the at least one analyte by a material comprising at least one polymeric material. The device may be a vial which comprises a supporting means supporting a retaining material made of a polymeric material optionally further including a non-polymeric material. The retaining material allows for a selective reversible retention of analyte(s) during solvent evaporation and subsequent elution from the retaining material into a well known volume of solvent. The device and method is especially useful within laboratory work or experiments, e.g. where concentrations of analytes are to be determined. Especially the location and geometry of the retaining material is suitable to retain the analyte(s) during the evaporative removal of the solvent.
Abstract:
Device and Process for isolating, purifying, concentrating and/or enriching at least one organic compound by electrokinetic migration through liquid membranes by use of an electronic potential and chambers with a preset pH value is described in the present application. The liquid membranes contain an organic solvent capable of transporting an ionized form of said at least one organic compound.
Abstract:
Disclosed are methods, compositions, and devices for an integrated, heterogeneous ion-exchange membrane-based plastic microfluidic biochip platform that can be used to detect multiple diagnostic markers present in real samples. Its various components can be easily integrated in a modular fashion for different applications. Automated control allows sequential and dynamic activation of different components on the chip. The integrated platform consists of three units and is designed to execute the following functions: (i) separation of the target biomolecules from the real sample, (ii) localizing and concentrating the targeted molecules at a specific location in the microfluidic chip, and (iii) detection of the targeted molecules using hybridization/docking events against a complementary ssDNA oligoprobe sequence or a specific antibody.
Abstract:
L'invention concerne un procédé permettant de capter un composé chimique, typiquement une impureté, et d'accumuler ce composé chimique sur une masse de captation CAPT comprise dans au moins une cartouche adsorbante démontable MC pendant une longue durée excédant 2 jours, en vue de son analyse chimique externe. L'invention concerne aussi un dispositif ST adapté de captation d'au moins un composé chimique dans un courant fluide, pour sa détection et/ou sa quantification, comprenant en aval de cette ou de ces cartouches, au moins un moyen de mesure du débit cumulé ayant traversé cette ou ces cartouches pendant un intervalle de temps déterminé. Selon une variante préférée de l'invention, la masse de captation CAPT est fragmentée en une pluralité de masses élémentaires CAPTi, permettant d'évaluer l'étalement d'un front d'adsorption irréversible ou le déplacement d'une zone chromatographique.
Abstract:
A sample concentrator for concentrating analytes in a solvent-containing liquid sample stream, including concentrator housing having a sample stream How channel and a gas stream flow channel having an inlet and an outlet, a heater for gas in the gas stream conduit, and a hydrophilic ion exchange or non-ionic membrane barrier separating said gas stream flow channel and said sample stream fjow channel Solvent is evaporated from the liquid sample stream in said sample stream flow channel in or at the interface with said membrane, when the gas stream is at an elevated temperature. A regeneration step is used to regenerate the ion exchange membrane barrier.
Abstract:
The invention relates to device and a method for isolating, concentrating and/or identifying at least one analyte by retaining the at least one analyte by a material comprising at least one polymeric material. The device may be a vial which comprises a supporting means supporting a retaining material made of a polymeric material optionally further including a non-polymeric material. The retaining material allows for a selective reversible retention of analyte(s) during solvent evaporation and subsequent elution from the retaining material into a well known volume of solvent. The device and method is especially useful within laboratory work or experiments, e.g. where concentrations of analytes are to be determined. Especially the location and geometry of the retaining material is suitable to retain the analyte(s) during the evaporative removal of the solvent.
Abstract:
An apparatus for the sequential and/or parallel treatment of a plurality of molecular sieves samples is provided. The apparatus includes at least one support means having attached thereto a plurality of sample holders. The support means is in fluid communication with the interior of each sample holder. The apparatus also includes a tube furnace for receiving the support means, a means for supplying an inert gas, air, oxygen or a mixture thereof to each sample holder for a selected time period, a programmable device for sequentially directing the flow of inert gas, air, oxygen or a mixture thereof to each support means and each sample holder attached to the support means, and a means for varying temperature of the tube furnace. The apparatus also includes a means for supplying an ion exchange liquid or a source of a metal to each support means and each sample holder attached to the support means. Alternative apparatus for ion exchange or metal loading of molecular sieves is provided. Processes for the treatment of a plurality of molecular sieves samples are provided.
Abstract:
The invention relates to a method for capturing charged molecules of interest traveling in an electrolyte flow stream through an electrically non-conductive channel, comprising at least one anode and at least one cathode individually separated from said channel, but in electrical contact with said flow stream, by a conductive ion selective semi-permeable membrane. Said membrane interferes with the normal migration of ions towards its respective electrode, generating at least two zones of different electric field. Balance between hydrodynamic and electrical forces captures certain ions into the flow stream. It also relates to a device for performing the method.