First, the scope of application Nitrogen blowing instruments are mainly used for concentrated preparation of large-volume samples, such as drug screening, hormone analysis, sample preparation in gas phase and mass spectrometry. details as follows: (1) Analysis of pesticide residues: such as vegetables, fruits, grains, plant tissues; (2) Environmental analysis: such as drinking water, groundwater and contaminated water; (3) Pharmaceutical drug testing: such as Chinese medicine pharmaceutical and drug testing; (4) Biological analysis: such as serum, plasma, blood, urine; (5) Drug testing: tests such as dioxins, trimeric nitriles, and Crotrox; (6) Food and beverage: such as milk, wine, beer, liquid beverage; (7) Public security commodity inspection. Second, the principle The nitrogen blower is also called a nitrogen blow dryer, an automatic fast concentrator, and the like. The instrument rapidly and evaporates and separates the moisture in the sample to be treated by rapidly, continuously and controllably blowing nitrogen onto the surface of the heated sample to achieve nitrogen-free concentration of the sample. At the same time, the instrument can keep the sample pure, so as to achieve rapid separation and purification. Nitrogen is an inert gas that acts to block oxygen. If the temperature around it is strengthened, it can prevent oxidation and accelerate evaporation. The nitrogen blower uses this principle to replace the traditional rotary evaporator and concentrate the sample. The nitrogen blower is not only easy to operate, but also can process multiple samples at the same time, which greatly shortens the inspection time. Therefore, it is widely used in medical test, chemical residue detection, pesticide residue detection and instrument pharmaceutical quality control as a general-purpose sample batch processing instrument. Third, the structure L-128 manual nitrogen blowing instrument: consists of a marble bottom seat, a stainless steel bracket and a nitrogen blowing head. The nitrogen blowing head can be moved up and down to facilitate experimental operation. The L-128 nitrogen blower is designed for 3 module areas and can simultaneously dry up to 90 samples. The L-128B nitrogen blower is designed for 2 module areas and can simultaneously dry up to 60 samples. L-148 automatic nitrogen blowing instrument: consists of program control panel, nitrogen blowing head, electric lifting device, gas flow meter, 6 sets of LED lighting, powerful exhaust device, and bottom positioning marking.
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