principle There are two ways to speed up evaporation: to strengthen the air flow around it and its temperature. Nitrogen is also an inert gas that also acts as a barrier to oxygen and prevents oxidation. The nitrogen blowing instrument achieves the purpose of concentration through these principles. It blows nitrogen rapidly, continuously, and controllably onto the heated sample surface to achieve rapid concentration of large amounts of sample. advantage 1. Multiple samples can be processed at one time, and the advantages are more obvious in multi-factor and multi-level repeated experiments. 2. The experimental operation is simple and flexible. It is possible to register the accounting at any time without restriction to adjust the process of enrichment. 3. The operator does not need long-term maintenance in the experiment, saving manpower. 4. The rotary evaporator may cause loss of sample when the solvent is boiled, and the nitrogen blower is accurate and sensitive when concentrated to avoid sample loss. Precautions (1) Nitrogen blowing equipment is not used for substances with a burning point below 100 °C. (2) Hands and eyes should be protected when using a nitrogen blower. (3) The nitrogen blower should be used in a fume hood to ensure good ventilation. (4) Do not move the nitrogen blower while heating to prevent burns. (5) Use with a three-wire grounded power supply. (6) Do not open the water bath enclosure with electricity to prevent electric shock. (7) The maintenance of the nitrogen blower should be carried out by a professional. Improper replacement of the components may cause damage to the nitrogen blower or pose a safety hazard. (8) Do not use a nitrogen blower for highly flammable substances such as petroleum ether. (9) Do not use acidic or alkaline substances, otherwise it will damage the nitrogen blowing instrument. Website: http:// Youth Biotech CO,. Ltd. , https://www.youtherb.com
