The role of the nitrogen blower is to reduce the sample volume and increase the concentration of the analyte
March 10 12:23:00, 2021
Shanghai Haozhuang Instrument Co., Ltd. develops the LNB brand nitrogen blower, which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more guaranteed and affordable. Concentration: After the sample is extracted and purified, the volume becomes larger, the concentration of the analyte decreases, which is not conducive to detection, so the purpose of concentration is to reduce the sample volume and increase the concentration of the analyte. Common methods are as follows: often Pressure concentration-suitable for components with relatively low volatility and relatively low boiling point. By increasing the temperature, the solvent is converted from the liquid state to the gaseous state and is pumped away or collected again through the condenser, so as to achieve the purpose of concentration. Decompression and concentration-by vacuuming, a negative pressure is generated in the container, the boiling point of the substance is reduced without changing the chemical properties of the substance, and some solvents with unstable chemical properties or high boiling point at high temperature are converted from liquid to liquid The gaseous state is pumped away or collected again through the condenser. Freeze-drying-while vacuuming and depressurizing, the solvent is sublimated, suitable for biologically active samples. Nitrogen blown concentration-suitable for small, volatile extracts. Inert gas is used to purge the heated sample liquid, so that the sample to be processed is quickly concentrated to achieve the effect of rapid separation and purification. This method is easy to operate, especially can process multiple samples at the same time, greatly reducing the detection time. It is widely used in pesticide residue testing, batch processing of samples in the pharmaceutical industry and general research.
Nitrogen vortex purge technology: The device adopts nitrogen vortex purge technology, and the sample is purged with nitrogen at a certain temperature to obtain a good enrichment effect for the substance to be tested. The concentrator is controlled by the microprocessor to ensure the automatic concentration and evaporation of samples. The gas nozzle blows out the nitrogen flow to form a spiral flow in the concentration tube, which slows down the impulse of the flow and makes the solvent evaporate evenly without splashing.
Influencing factors of nitrogen blowing concentration: Appropriately increasing the temperature can improve the recovery rate of the target substance. For different substances, the temperature and pressure during concentration can be appropriately controlled by setting the parameters of the concentrator to shorten the concentration time to achieve a better recovery rate.
The company's main business and production scope include: testing instruments, laboratory equipment, cleaning equipment, environmental protection equipment and undertaking the design and customization of non-standard products and providing related technical services. First-class technology, first-class service.
