Purified water What is the difference between deionized water and distilled water? What are the main

Ultrapure water: Ultrapure water not only removes the conductive medium in the water almost completely, but also removes the colloidal substances, gases and organic matter in the water to a very low level. The resistivity is greater than 18m*cm, or close to the limit value.

Ro water: also known as pure water. That is, the water filtered through the reverse osmosis membrane, the pore size of the reverse osmosis membrane is generally between 10A and 100A, so it can remove more than 95% of ionic impurities.

Distilled water: water obtained by using the difference in the volatility of each component in the liquid mixture to vaporize H2O and subsequently condense and separate the vapor part.

DDH2O: Distillation-Distillation H2O (double distilled water), water obtained by 2 distillations.

Deionized water, water that removes both cations and cations from the water. Ions in water are mainly removed by RO membranes and mixed-bed resins. However, there are also many people who call RO water deionized water, which is inaccurate.

Ultrapure water is the purest water nowadays, followed by two-stage reverse osmosis water (two-stage RO water), double-distilled water (DDH2O), pure water (RO water), and distilled water.

Ultrapure water can be used as all experimental water, especially for high-sensitivity ICP MS, PPT level analysis, isotope analysis, CDC, drug testing institute, quality inspection institute, environmental supervision station, university scientific research and other standard laboratories and various high-end precision instruments. Other pure water and double distilled water can also be used according to the actual situation, when the requirements are not very strict.

oh no is not different in the ionic content inside.

The uses are all drunk.

(1) Distilled water, refers to the water obtained after heating, condensation, if the water contains substances that are easy to evaporate when heated (such as mercury, aldehyde, etc.), it will also condense into the distilled water with steam, 2) deionized water, refers to the water through resin exchange to remove the anion and cation in the water, but there are still some nutrients in the water, and long-term storage will breed bacteria, 3) pure water, refers to the water through sand filtration, activated carbon filtration, resin exchange, mixed bed, and the final water obtained is basically pure water.

4) Tap water refers to the water that has been preliminarily treated and the content of various ions and microorganisms in the water meets the national requirements, and residents can drink it after heating, but cannot drink it directly.

The differences between distilled water and deionized water are as follows:

1. The essence is different.

Deionized water refers to pure water after the removal of impurities in the form of ions, and ion exchange resin is used to remove anions and cations in the water, but there are still soluble organic matter in the water. Ion exchange columns can be contaminated to reduce their efficacy, and deionized water can easily cause bacteria to multiply after storage.

Distilled water refers to the water that has undergone distillation and condensation operations, and the second distillation is called re-distilled water, and the third distillation is called three-distilled water. Water with low oxygen consumption, potassium permanganate and acid industrial distilled water is obtained by distilled water method. At the same time, drinking distilled water regularly is equivalent to giving up 5% of the trace elements needed by the human body from water**.

2. The formation method is different.

Deionized water is near-pure water obtained by removing ionic impurities from water through ion exchange resins. Distilled water is the process of boiling the source water and then evaporating and condensing**, a process that consumes a lot of heat.

3. The role is different.

Distilled water does not conduct electricity, which can ensure the stable operation of the machine and prolong the life of the appliance. Deionized water is mostly used in chemical laboratories for routine tests in general laboratories.

4. Different uses.

Distilled water is mostly used in life, pharmaceutical industry and laboratory; Deionized water, on the other hand, is mostly used in laboratories, electronics industry production and petrochemical industries. Deionized water has a very wide range of uses in modern industry, because the number of ions in deionized water can be artificially controlled, so that its resistivity, solubility, corrosivity, viruses and bacteria and other indicators can be well controlled.

Therefore, in industrial production and laboratory experiments, the results of the parameters using deionized water are closer to the ideal data, and the product quality is easier to control.

2. Distilled water.

Drinking water is heated to boiling to vaporize it, and then the vaporized water is cooled to turn into liquid water, which is called distilled water.

When there is no special restriction on water for medical use, it generally refers to distilled water.

Generally used as: solvent, diluent, cleaning (detergent), contact agent, etc.

3. Deionized water.

It is a relatively pure water prepared by ion exchange method (also known as chemical exchange method) or electrodialysis method. Compared with distillation, raw.

The production equipment is simple, saves fuel and cooling water, and the water quality is chemically pure. However, it is often not possible to completely remove organic impurities from the water and cannot be used for injection. It can only be used as a hydrogenic for the preparation of water for injection.

They are all collectively referred to as water, but based on the amount of impurities contained in the water, they distinguish (it can also be said to be the purity of the water) water with different states of premature water quality.

Deionized water: The water is passed through the anion and cation exchange resin bed, and the anion and cation in the water are removed through exchange, and the resulting water is deionized water, which is generally used for chemical laboratory water needs.

See Laboratory Water Standards for Standards.

Distilled water (i.e., pure water): water prepared by condensing water vapor by distillation is called distilled water. Generally, large-scale water production is obtained by condensing the vapor generated by the boiler. It is used for preparations, pharmaceuticals, etc., and experimental water that does not require too much.

For the standard, see the Chinese Pharmacopoeia

Pure water: through sand filtration, activated carbon adsorption and deodorization, and then filtered by reverse osmosis membrane to remove ions, also known as pure water, space water, the most pure water on the market is prepared in this way.

Long-term drinking of purified water affects physical health Water is one of the most important of the six major nutrients that human beings rely on for survival, and the minerals and trace elements in water are essential to human health.

Professor Jin Riguang of the Center for Life Dynamics and Water Resources Research of Beijing University of Chemical Technology pointed out: "Water plays a very important role in the origin of life and in the continuation of life.