The desktop rotary evaporator was developed by heidelf, Germany, which gathered hundreds of experts from all over the world to make suggestions and demands on the rotary evaporator during the use process, through actual contact with customers. In terms of design, experts constantly design and adjust through actual experience and demand, including evaporation tube jacket, anti reflux angle of condensation tube, surface area of 2200cm M2 condensation tube, LED ring indicator light, heating pot dumping handle... In terms of details, you have achieved the acme. In the actual use process, no matter from the safety or convenience of operation, you are all for rotary evaporation The overall use of Fayi has brought about a qualitative change, which truly reflects the concept of Heidolph's R & D team to assist scientific research.

For the rotary evaporator, good equipment is half of the success of the experiment. At the same time, how to operate the equipment correctly, improve the service life of the instrument and reduce the maintenance cost is also a topic of great concern to all scientific researchers.

There are some acid-base problems in deionized water. When deionized water meets stainless steel, there will be some electrochemical reaction, that is charge transfer. As a result of this transfer, the electrons of metal elements in stainless steel will be absorbed and some anode electrons will be exposed. For example, when the positive valent iron ion encounters oxygen in the air, because the electrode potential of iron is always lower than that of oxygen, iron will be corroded as the negative electrode. We often see that there are many small bulges with different diameters after the heating pot has been used for a long time, that is, oxygen corrosion occurs on the surface of the heating pot, and the secondary layer is black powder ulcer corrosion pit, which leads to the damage of stainless steel containers. This is irreversible and we can't ignore it. This is one of the important reasons why high purity deionized water can not be stored or transported in stainless steel containers.

Similarly, distilled water or desalted water in the laboratory is not suitable for stainless steel heating pots. Distilled water usually refers to the water in which the anions and cations dissolved have been removed. Therefore, water tends to recover these cations and anions in order to saturate them again. So it became "hungry.". To satisfy hunger, water dissolves ions in the metal and carbon dioxide in the air, turning it into carbonic acid. This results in the pH value of distilled water around 5, that is, in the acidic range, the metal will be corroded.

Take good care of your heating pot, please do not use the above water quality for heating operation.

What kind of water should we use? Please use laboratory tap water. Tap water has low cost and is not easy to rust. It should be noted that in the use of tap water to operate the heating pot, for a period of time, scale accumulation will inevitably occur. Scale is the accumulation of calcium and magnesium in tap water. Due to the difference of hardness of water quality in different parts of the country, the hardness in the north is a little bit higher than that in the south, and the condition of the heating pot after using tap water is also slightly different. Although the scale has little effect on the heating pot itself, it has a great impact on the appearance, and it will also affect the heat conduction efficiency for a long time. Therefore, it is necessary to clean the scale regularly, which is also a necessary course for the maintenance of water bath in the laboratory.

To remove scale, we usually use baking soda, acetic acid, citric acid and so on. In the laboratory, Xiaohai recommends that you use low concentration citric acid to clean the water bath pot regularly. On the one hand, citric acid can effectively dissolve scale, making your water bath as new as ever. On the other hand, citric acid belongs to weak acid organic acid, does not contain chloride ion, and has the least damage to metal components, so it can protect the heating pot from damage.

In addition, we use tap water heating process, if you can add a certain proportion of pure water, can delay the formation of scale Oh!

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