Common problems and solutions in the use of laboratory purified water equipment
Laboratory water purification equipment using common problems and solutions author of the article: You can say, in which the experiment, the largest amount of high purity water. For example, according to statistics, a laboratory with an annual output of 3 million tissue culture seedlings needs more than 15 kg of high-quality pure water every day. Enough to show the amount of water used. However, pure water equipment for producing pure water also encounters many problems such as contaminated oils that easily block the resin micropores, organic compounds and cationic resin degradation products during the aging process. Common problems and solutions in the use of Genetic 1. Resin contact with oily substances Contaminated elga pure water equipment is easy to block the resin micropores by oily substances, which seal the active groups of the micropores and prevent the active groups from being exchanged. Especially when tap water with newly installed water pipes is used as a water seal with hemp yarn soaked in kerosene instead of raw material tape, the tap water with greasy dirt quickly saturates the resin, the greasy dirt passes through the water purifier, and the effluent quality becomes poor. With this pure water as a medium, the rooting rate is almost zero. When this happens, the resin can be soaked in alkaline salt water to 40-45°C for 2 hours, and then do it again according to the new resin pretreatment method. There are also non-ionic surfactant soaking treatments. 2. Poisoning of Classic UV Anion Resin After repeated use, the anion resin is contaminated by organic compounds and degradation products of the cation resin during the aging process, the exchange capacity decreases, the leaching time during regeneration is prolonged, and anion activation treatment is required. Activation method: Soak the anion resin in 70% ethanol solution containing 3% table salt for 2 hours, stir from time to time, do it again according to the new resin pretreatment method, and then perform the conventional regeneration treatment, which can shorten the regeneration leaching time. 3. Confusion of yin and yang pillars. Because the water outlet and appearance of the exchange pillars of yang 1# and yin 5#, yin 3# and yang 4# are the same, yang 1# and yin 5 #, yin 3# and yang are likely 4# interchange position. Cationic resin regenerated by alkali treatment or anion resin regenerated by acid treatment has no ion exchange capacity. The misplaced anion resin at the beginning retains the color of the original new resin after two years of use, and it can be called a resin without work. At this time, the quality of the pure water produced is very unstable, the exchange capacity is small, and the rooting of the tissue culture material is unstable. What needs to be strong is that if the pure water equipment is not used for too long, the resin will undergo oxidation reaction and continuously produce impurities. At this time, if it is used, it will affect the hardness of the water. The treatment method is to take out all the resin and do it again according to the new resin pretreatment. The result of this is time-consuming and labor-intensive. Greatly reduce the efficiency of use.
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