A kind of small-size laboratory ion interchange unit
Technical field
The utility model relates to a kind of ion interchange unit, relates to the ion-exchange chromatography field.
Background technology
The principle of ion-exchange chromatography is that charged biomolecule and the ionic group on chromatograph packing material exchange and realize separation and purification.Ion exchange technique is widely used in water treatment, the extraction of biological sample, purification isolation analysis.
At present, the use for laboratory small ion exchange column is mainly by a upper end open, and the glass column that lower end is connected to glass valve forms.Control the flow velocity of eluent in ion exchange process by the glass valve of pillar lower end.The calculating of flow velocity be mainly by manual measurement in the unit interval effluent volume by chromatograph packing material try to achieve.The height, the unit interval eluent that need to measure chromatograph packing material in pillar internal diameter, pillar flow out the indexs such as volume, and the flow velocity error calculated is larger.And because the cylinder lower end directly is connected with the glass valve of coutroi velocity, and the volume of chromatograph packing material is generally less than normal, in ion exchange process, often there is filler to stop up the situation of glass valve, cause exchange process blocked, even make eluent overflow.In addition, because most of chromatograph packing material has swellability, the chromatograph packing material volume of actual dress column volume and measurement has larger error, causes errors of analytical results to reach more greatly the filler waste.
Summary of the invention
In order to overcome existing small-size glass ion exchange column, eluent outflow speed can not accurately be set, easily cause glass valve to stop up, eluent overflows and deficiency that can not Accurate Determining chromatograph packing material volume, the utility model provides a kind of ion interchange unit, this small-size laboratory not only can accurately arrange eluent flow rate with ion interchange unit, effectively avoids glass valve to stop up, and can measure the volume of chromatograph packing material, and easy to use, be easy to dismounting.
The utility model solves the technical scheme that its technical problem adopts: by centre, the frosted mouth glass stopper with grass tube is connected with the front glass spinner flowmeter glass ion exchange column of upper end band frosted mouth.Eluent first enters ion exchange column through grass tube again by glass rotameter, and the flow of eluent is directly measured by glass rotameter.
In the utility model, described glass ion exchange column lower end, arrange one deck 3-4mm core with the glass valve junction, stops chromatograph packing material to enter glass valve, and eluent can pass through core simultaneously, effectively avoids stopping up, and prevents that eluent from overflowing.
In the utility model, described ion exchange column is designed to the scale glass column, and minimum scale is accurate to 0.5mL, thereby directly reads the chromatograph packing material volume of packing into.
The beneficial effects of the utility model are, can pass through glass rotameter Accurate Measurement eluent flow rate, by core, effectively prevent that glass valve from stopping up and eluent overflows, can directly accurately read the volume of chromatograph packing material after the ion exchange column of packing into, and simple in structure, for convenience detach.
The accompanying drawing explanation
The structural representation that accompanying drawing is ion interchange unit described in the utility model.
In figure, 1 ion exchange column with scale, 2, glass rotameter, 3, the middle frosted mouth glass stopper with grass tube, 4, the frosted mouth, 5, core, 6, water supply hose.
The specific embodiment
In accompanying drawing, ion exchange column (1) upper end with scale arranges frosted mouth (4), frosted mouth glass stopper (3) by centre with grass tube is connected with front glass spinner flowmeter (2), flowmeter (2) lower end connects water supply hose (6), simultaneously, 3-4mm core (5) is set between exchange column lower end and speed control valve door.
When ion interchange unit described in the utility model carries out ion-exchange chromatography, by ion exchange column upper end frosted mouth (4) chromatograph packing material of packing into, the happy packing volume of reality of dress post can directly be read by the scale on exchange column.Eluent enters glass rotameter by water supply hose, through grass tube, enters ion exchange column, and the eluent flow can, by the spinner flowmeter Accurate Determining, reduce error.Flow out ion exchange column through core after the eluent exchange finishes, core can effectively stop chromatograph packing material to stop up glass valve, prevents that eluent from overflowing.
Ion interchange unit described in the utility model also can use in several device series connection.Simultaneously, with the ion exchange column (1) of scale, the middle frosted mouth glass stopper (3) with grass tube, glass rotameter (2) and water supply hose (6) are all detachable, and easy for installation.