50 results about "Electrochromatography" patented technology

The invention relates to a preparation method for a grapheme open-tube electric chromatographic column, and relates to the preparation method for a novel capillary electric chromatographic column. In the method, a conductive polymer polyaniline assisted polydopamine bonded graphite oxide is used as a fixed phase. The conductive polymer polyaniline is bonded to the inner wall of a capillary to serve as an underlying material, so that the specific surface area of the capillary is increased, the modification time and the modification frequency of dopamine are remarkably reduced, and the modification degree of the polydopamine is improved; and therefore, the reaction of the graphite oxide is facilitated. The preparation method is easy to operate and low in cost; the overall preparation process is performed in aqueous solution, and an organic solvent or a toxic reagent is not used; the environment is not polluted; each prepared coating has the high stability; the service life of the capillary column is long; according to the grapheme open-tube electric chromatographic column prepared by using the preparation method, the chromatographic performance of the grapheme open-tube column is remarkably improved, and the effect on separating the homologs of benzene is better compared with that of a polydopamine bonded graphite oxide open-tube.

The invention discloses an electrochromatography device, which comprises an infusion system, a shunting system, a quantitative sampling system, a current circuit system, a chromatographic separation system, a temperature control system, a detector, a data processing system and a liquid waste pool, wherein the infusion system is introduced on the basis of reserving the advantages of a traditional separate analysis device and the work which cannot be done by a traditional electrophoresis instrument can be done; the quantitative sampling system is introduced and the problems of cross contamination, poor quantitative reproducibility and the like of a traditional electrophoresis apparatus are solved; the current circuit system is introduced and the multi-mode separate mode can be achieved by only one set of device; a novel chromatographic separation system (open tube-type chromatographic column) is introduced, the whole device has the selectivity of a high-performance liquid chromatographic instrument and is a potential separate analysis device while the problems that a traditional packed column is difficult to prepare, easy to block, short in service life and high in cost are solved; and the electrochromatography device is stable, reliable and simple in operation, and is expected to be popularized and applied to multiple frontier domains of biological medicines, environment analysis, bioscience and the like.

The invention provides a polydopamine-assisted method for fixing a covalent organic framework material, and an application thereof. First, a dopamine water solution is prepared; the pH value is regulated to weakly alkaline, and an oxidation treatment is carried out; a carrier with a clean surface is added under room temperature, and the surface of the carrier is modified with a polydopamine coating; the modified carrier is placed in a mixed solution of binary boric acid and 2,3,6,7,10,11-hexahydroxyl triphenyl; one boric acid group is subjected to a reaction with o-phenyldihydroxyl site provided by the polydopamine coating, and another boric acid group participates in COFs framework formation, such that COFs crystal is formed on site and fixed on the surface of the carrier. The preparation process provided by the invention is simple. With the wide adaptability of polydopamine modification, synthesis and fixing of COFs on the surfaces of various substrates can be realized. The method is applied in preparing open tubular electrochromatography columns. Prepared open tubular column based on COF-5 has good separation effect upon electrically neutral benzene-series substances in an electrochromatography mode.