The two devices, the distillation unit and the digester, can be used individually or combined as a complete set of Kjeldahl apparatus. When used alone, the distillation unit is specially designed to distill the sample, ie when the sample is digested, the nitrogenous substance is distilled out at high temperature, and the digester is used to digest the sample. Sulfuric acid, coupled with the catalyst, is digested together with the nitrogenous sample. At this point nitrogen in the nitrogenous sample will react with sulfuric acid to produce ammonium sulfate.
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Well, we often encounter problems when we use materials such as distillation equipment and digestion furnaces to determine nitrogen in materials. Below, we highlight the problems that we often encounter during experiments, and then give some explanations.
1. Is the sample repeatedly tumbling in the distillation unit, posing a danger to the operator?
The traditional fixed nitrogen device may present potential danger to the experimenter. However, the distillation equipment produced by Zhejiang Top Company will not, it fully considers the safety issues, and adds safety door devices during design to ensure the life safety of the experimenters. At the same time, the Kjeldahl titrator violently tumbling because of the large amount of water vapor entering the digestive tube. At this time, the Kjeldahl meter has its own overpressure protection device, which can maintain the internal normal pressure and will not cause any harm to the operators.
2. What are the requirements for adding water to the distillation unit?
The water contained in the distillation bucket of Kjeldahl is required to be distilled water or pure water, and it is better to let the water out of the distiller if you don't use the Kjeldahl meter for a long time.
3. How does the Kjeldahl nitrogen analyzer turn on the water in the distiller?
It is normal to check whether the distilled water tank is leaking in half a minute after being turned on, and it is normal to be filled with gas. Check if the water level in the distilled water tank exceeds one third, which is not enough;
4. When the sample is in the digester, can it heat the digester?
When samples are digested, strong fires cannot be used. If the sugar or fat content of the sample is very high, then we must pay attention to the temperature control, so as not to spray a large amount of foam out of the Kay flask, causing the danger of personnel, and the results of the determination will be affected. The digestion furnace produced by Zhejiang Top Company includes water bath heating and electric heating. The greatest benefit of heating in a water bath is to heat evenly.