1. Product introduction The circular water bath nitrogen blowing instrument JC-WD-12/24 adopts internationally recognized technology, uses purge capture technology, and can heat the sample at a controlled temperature. Inert gases such as nitrogen are quickly, controllably and continuously blown to the surface of the sample to achieve rapid oxygen-free concentration of the sample solution. The method is time-saving, convenient and accurate. It is widely used in food safety, education and scientific research fields. 2. Product parameters 3. Product features 1. Suitable for containers of different specifications such as test tubes, conical bottles, centrifugal tubes, etc. 2. Number of sample digits: 12 digits, the sample holder of the spring test tube clip is fixed and positioned, and each sample has a numerical number. 3. The test tube is fixed in position through the test tube clamp and support plate with spring, and the height direction can be adjusted arbitrarily. 4. Freely lifting needle valve. According to the size of the test tube and the amount of solvent, each air duct can be independently lifted to the appropriate height, and the adjustable needle valve can control the gas flow. 5. Circular structure, free rotation, convenient for the sample holder to enter and exit the water bath, and convenient to operate. 6. Intelligent digital thermostat, timing, dual digital display, adjustment adopts PID technology and can realize overtemperature alarm and anti-dry burning. 7. All parts of the circular nitrogen blowing instrument are made of uniform stainless steel and can resist organic solvents such as acid and alkali. 8. Regulating valve: Imported regulating valve to ensure good air tightness and durability. 9. When concentrating toxic solvents, the entire system can be placed in a fume hood.