What is purified water and what is purified water?

Purified water is an industry term, and the 2010 version of the Chinese Pharmacopoeia stipulates that the purified water is described as follows:

Purified water

Purified water H2O This product is water prepared for medicinal use by distillation, ion exchange, reverse osmosis or other suitable methods for drinking water, without any additives.

2. The 2010 edition of the pharmacopoeia inspection items.

Properties: This product is a colorless clear liquid; Odorless, tasteless.

2. Take 10ml of this product for pH, add 2 drops of methyl red indicator solution, and it shall not be red; Take another 10ml and add 5 drops of bromothymol blue indicator solution, which should not be blue.

nitrate take 5ml of this product and put it in a test tube, cool it in an ice bath, add 10% potassium chloride solution and diphenylamine sulfuric acid solution, shake well, slowly add 5ml of sulfuric acid dropwise, shake well, place the test tube in a 50 water bath for 15 minutes, the blue and standard nitrate solution produced by the solution [take potassium nitrate, add water to dissolve and dilute to 100ml, shake well, take 1ml of precision, dilute it into 100ml with water, take 10ml of precision measurement, dilute it into 100ml with water, shake well, and get (every 1ml is equivalent to 1 GNO3)], add nitrate-free water, and compare the color after treatment with the same method, not deeper (006%).

nitrite take 10ml of this product, put it in a Knott's tube, add 1ml of dilute hydrochloric acid solution (1 100) of p-aminobenzene sulfonamide and naphthalene ethylenediamine hydrochloride solution (, the pink color produced, and the standard nitrite solution [take sodium nitrite to be calculated as a dry product), add water to dissolve, dilute to 100ml, shake well, take 1ml for precision, dilute it into 100ml with water, shake well, and then take 1ml for precision, dilute it into 50ml with water, shake well, that is, (every 1ml is equivalent to 1 gNO2)), Add nitrite-free water, and compare the color after treatment with the same method, not deeper (..)0000 02%)。

Ammonia take 50ml of this product, add 2ml of alkaline mercury iodide potassium test solution, and leave for 15 minutes; If it is colored, it should not be deeper (03%) compared with ammonium chloride solution (take ammonium chloride, add an appropriate amount of ammonia-free water to dissolve and dilute it into 1000ml), add 48ml of ammonia-free water and 2ml of alkaline mercury iodide potassium test solution.

Conductivity Conductivity 2 s cm (resistivity m .)cm)

Total organic carbon shall not exceed Appendix viii r).

Easy Oxide take 100ml of this product, add 10ml of dilute sulfuric acid, boil, add potassium permanganate titration solution (, and boil for 10 minutes, the pink color shall not disappear completely.

Non-volatile substances take 100ml of this product, put it in an evaporation dish of 105 constant weight, evaporate it on a water bath, and dry it to constant weight at 105, and the residual residue shall not exceed 1mg.

heavy metals take 100ml of this product, add 19ml of water, evaporate to 20ml, cool, add acetate buffer (make 25ml with an appropriate amount of water, add 2ml of thioacetamide test solution, shake well, place for 2 minutes, and compare with the color of the standard lead solution with 19ml of water after treatment with the same method, not deeper (01%).

It refers to water composed of a single molecule, such as distilled water, which is not pure water: sugar water, mineral water, because it contains other elements.

If you're asking what purified water is, I don't think it's necessary, if not, please reset it, okay? Thank you.

Ordinary water contains a variety of ions, such as sodium ions. Chloride ions, etc., some water that needs to be extremely pure in the field of chemistry or physics and cannot contain any ions, ordinary water can not meet the needs of some chemical reactions, so the ions in the water are removed through some equipment, which is purified water. Distilled water is a kind of purified water, distillation can remove most of the metal ions, but in some special occasions such as biopharmaceuticals may require ultra-pure water, this water is generally purified by special instruments through a variety of processes, stored in special containers, and contains almost no ions, so this water is extremely expensive

A type of water that has been chemically processed

Literally understood as a pure chemical potion.

What a problem!

Really can't be a man?

Ordinary water contains a variety of ions, such as sodium ions, chloride ions, etc., some water that needs to be extremely pure in the field of chemistry or physics can not contain any ions, and ordinary water can not meet the needs of some chemical reactions, so the ions in the water are removed through some equipment, which is purified water.

Distilled water is a kind of purified water, distillation can remove most of the metal ions, but in some special occasions such as biopharmaceuticals may require ultra-pure water, this water is generally purified with special instruments through a variety of processes, and stored in special containers.

Purified Water Testing Standards:

1. Character: It should be odorless, tasteless, colorless and clear liquid.

2. pH: Add 2 drops of methyl red and 5 drops of bromothymol blue, and not blue.

3. Conductivity: Conductivity should be.

4. Nitrate: if the color development shall not exceed the standard control solution.

5. Nitrite: if the color development should not exceed the standard control solution.

Purified water (deionized water or deep demineralized water) refers to water with a resistivity greater than *cm at a temperature greater than 25°C.

Purified water is water prepared by distillation, ion exchange, reverse osmosis or other suitable methods for medicinal purposes, without any additives. Properties: Colorless clear liquid; Odorless, tasteless.

Ordinary water contains a variety of ions, such as sodium ions, chloride ions, etc., some water that can not contain any ions can not be extremely pure in the field of chemistry or physics, and ordinary water can not meet the needs of some chemical reactions, so the ions in the water are removed through some equipment, and the resulting product is purified water.

Related Notes:

Purified water and pharmaceutical water should be transported by stainless steel pumps that are easy to disassemble, clean and disinfect. In the case of purified water and water for injection that need to be delivered by compressed air or nitrogen pressure, the compressed air and nitrogen shall be purified.

Purified water should be transported by circulating pipelines. The design of the pipeline should be concise, and blind pipes and dead corners should be avoided. The tubing should be made of stainless steel or other pipes that have been verified to be non-toxic, corrosion-resistant, and do not leach polluting ions.

The valve should be a sanitary valve without dead angles, and the flow direction should be indicated for the transportation of purified water.

The pipelines and pumps for transporting purified water and water for injection should be cleaned, disinfected and sterilized regularly, and can only be put into use after being verified.

The purified water is prepared by distillation, ion exchange, reverse osmosis or other suitable methods for medicinal purposes, without any additives.

Properties: This product is a colorless clear liquid; Odorless, tasteless.

Distilled water can be used, purified water cannot be replaced. The nature is not the same.

In fact, it is very simple that the water that can meet the purified water standard of the Chinese Pharmacopoeia is purified water, and the specific indicators can be found in the purified water standard of the second part of the Pharmacopoeia.

Purified water refers to water with greater resistivity than 25°C when the temperature is greater than 25°C, generally deionized water or deep desalinated water. Purified water is water prepared by distillation, ion exchange, reverse osmosis or other suitable methods for medicinal use, without any additives. Purified water is a colorless, clear liquid, odorless and tasteless.

Ordinary water contains a variety of ions, such as sodium ions, chloride ions, etc. Some chemical or physical fields require extremely pure water that does not contain any ions, so the ions in the water are removed by the equipment to obtain purified water.

Generally, the purity of purified water is tested from the aspects of properties, pH, conductivity, nitrite, etc.

Purity water (deionized water or deep demineralized water) refers to water with a resistivity greater than *cm when the temperature is greater than 25 °C.

Purified water application range: fine chemical, medical, electronics, pharmaceutical, and other industries. Among them, purified water should be used for the process of washing drugs and equipment, utensils, bottle washing, ingredients, packaging materials and other processes in the production of medical infusion preparations, and purified water should be used for cleaning instruments and dialysis machines in hospital operating rooms.

Therefore, purified water equipment that meets GMP certification standards is generally selected to produce purified water.

Many users can't tell the difference between pure water, purified water, and ultrapure water, and today I will tell you about the difference between pure water, purified water, and ultrapure water. Ultrapure water refers to water in which ions are almost completely removed from the water, and non-dissociative colloidal substances, gases and organic matter are removed from the water to a very low level.

Pure water: pure water refers to H2O without impurities, pure water is mainly filtered by reverse osmosis, so as to meet the requirements of pure water, the water quality of pure water is clear, without any impurities, can effectively avoid the invasion of bacteria, can safely and effectively replenish water for the human body, and has the effect of promoting metabolism.

Purified water: Purified water is water prepared for medicinal purposes by distillation, ion exchange, reverse osmosis or other suitable methods, without any additives. In the field of medicine, it is necessary to use relatively pure water, and ordinary water cannot meet the requirements, and the ions in the water are removed by equipment, which is purified water.

Ultrapure water: Ultrapure water refers to water that almost completely removes ions from water, and removes colloidal substances, gases and organic matter that do not dissociate from the water to a very low level. It needs to be made by multi-layer processes such as pretreatment, reverse osmosis, EDI, resin, sterilizer, etc., and the resistivity of ultrapure water can reach 18 megaohms·cm, and the highest can reach megaohms·cm.

What's the difference?

1.The manufacturing process is different:

Pure water is generally prepared by reverse osmosis or distillation.

Purified water is pharmaceutical water prepared by distillation, ion exchange, reverse osmosis or other suitable methods.

Ultrapure water generally needs to go through multi-layer processes such as pretreatment, reverse osmosis, EDI, resin, and sterilizer to be made.

2.Different uses:

Pure water is generally used in chemical industry, metallurgy, aerospace, electric power, electronic industry, biology, chemistry and other fields.

Purified water is generally used in pharmaceuticals and for medicinal purposes.

Ultrapure water is widely used, generally used in the production of displays, hard disks, CD-ROM and other water, extreme ultrapure water with terminal polishing mixed bed, laboratory, biology, pharmaceutical, petroleum, chemical, steel, glass and other fields.

3.Conductivity is different:

Pure water conductivity is between 2-10us cm.

Purified water conductivity.

The conductivity of ultrapure water is .

4.The indicators of impurities in the water are different:

The impurity content of pure water and purified water is in the ppm range, and ppm is the parts per million or parts per million.

In addition to water molecules, ultrapure water generally has almost no impurities, no bacteria, viruses and other substances, and no minerals required by the human body, so it is generally used in industry.

Purified water is used in laboratories, biopharmaceuticals, electronic semiconductors, medical device disinfection and production, GMP and other application industries. Wanda Environmental Protection, with 13 years of experience in the water treatment industry, answers all kinds of water treatment equipment questions for you.

At present, pure water is mainly used in two major fields:

1. Life science applications.

2. Analysis and routine application areas of life science applications, mainly including: bacterial cell culture, clinical biochemistry, electrophoresis, electrophysiology, enzyme-linked immunosorbent assay, endotoxin analysis, histology, hydroponics, cell immunochemistry, mammalian cell culture, media preparation, microbial analysis, molecular biology, monoclonal antibody research, plant tissue culture, radioimmunoassay and so on. In terms of analysis and routine application, the main ones are:

Water Supply for Distilled Water, Steam Generator, Glassware Cleaning, Sample Dilution and Reagent Preparation, Water Supply for Ultrapure Water Systems, Solid Phase Extraction, General Chemistry, Electrochemistry, Spectrophotometry, TOC Analysis, Water Analysis, Ion Chromatography, Flame Atomic Absorption (Flame-AAS), Graphite Furnace Atomic Absorption (GF-AAS), High Performance Liquid Chromatography (HPLC), Liquid Chromatography-Mass Spectrometry (HPLC-MS), Electrolygically Coupled Plasma Spectrometry (ICP-AES), Plasma Mass Spectrometry ( ICP-MS), trace metal detection, gas chromatography-mass spectrometry (GC-MS), and many more.

Purified water (deionized water or deep demineralized water) refers to water with a resistivity greater than *cm at a temperature greater than 25°C; Pharmaceutical water prepared for drinking water by distillation, ion exchange, reverse osmosis or other suitable methods, without any additives.

Purified water is generally used for medicinal purposes; Purified water conductivity. The quality of purified water directly affects the quality of the product and is a very important utility; Purified water and pharmaceutical water should be transported by stainless steel pumps that are easy to disassemble, clean and disinfect.