Deionized vs Distilled water
水covers more than 70% of the earths’ surface. Out of this, a larger portion of water is in the oceans and seas, which is about 97%. Rivers, lakes, and ponds have 0.6% of water, and about 2% is there in polar ice caps and glaciers. Some amount of water is present in the underground, and a minute amount is in the gas form as vapors and clouds. Among this, there is less than 1% of water left for direct human use.
水用于实验室的许多目的。河流,湖泊或池塘的水包含许多东西,例如微生物,悬浮颗粒,离子,溶解的气体等。雨水还包含除水分子以外的许多其他东西。甚至在纯化后分布的自来水也具有许多溶解的化合物。这些溶解的化合物可能会改变水的特性。水是一种透明,无色,无味和无味的液体。纯水应具有中性pH值,而我们从各种来源取水可能是酸性的或碱性的。但是,由于水中的杂质,我们无法将其用于某些目的。在必须进行准确测量的实验中,应使用纯净的水。例如,如果必须以滴定方法测量样品的酸度,则应在从清洁玻璃器皿到制造溶液等过程中使用非常纯净的水。否则,使用普通水将在测量中出现错误。在这种情况下,去离子水和蒸馏水是可用于使用的纯净水。
Deionized Water
This is a type of purified water in which all minerals have been removed. Mineral ions like sodium, calcium, chloride, bromide are present in natural water and are removed in the deionization process. In this process, normal water is send through an electrically charged resin that attracts and retains the mineral ions. However, this method only removes charged ions and does not remove microorganisms, other uncharged particles and impurities present in the water.
Distilled water
In distilled water, the impurities are removed during distillation process. The basis of distillation relies on the fact that other molecules and microscopic impurities in the water are heavier than the water molecules. Therefore, when distilling, only water molecules will evaporate. Water boils at 100oC and water molecules will evaporate. Water steam is then allowed to travel inside a condensation tube where flow of water will absorb the heat in steam and make it condensed. Then the condensed water drops can be collected into another clean container. This water is known as distilled water. Distilled water should contain only water molecules without any bacteria, ions, gases, or other contaminants. It should have a pH of 7, which indicated that the water is neutral. Distilled water has no taste since all the minerals have been removed. However, it is safe to drink. However, distilled water is mainly used for the research purposes.
What is the difference betweenDeionized Water and Distilled Water? • When preparing deionized water, normal water is sent through a charged resin column. Distilled water is prepared by distillation process. • There are no mineral ions in deionized water; however, there can be other impurities and bacteria. In distilled water, most of the other impurities also are removed, and the water is more purified than deionized water. |
PH. Phuocsays
Thanks for your post. It found it very helpful. However, there was some point I did not understand. I knew the DI water production system is more expensive than the distilled water production system. Right? However, as you mentioned, the quality of distilled water is better compared to DI water? Why do people have to produce DI water?