name | First level |
Resistivity ( 25 °C) , Ï/ ( MΩ·cm ) | ≥ 18 |
Total organic carbon ( TOC ), Ï/ ( μg/L ) | ≤ 50 |
Sodium ion, Ï/ ( μg/L ) | ≤ 1 |
Chloride ion, Ï/ ( μg/L ) | ≤ 1 |
Silicon, Ï/ ( μg/L ) | ≤ 10 |
Total number of bacteria / ( CFU / mL ) | qualified |
What is high purity water?
High-purity water is water that removes impurities such as ions, organic matter, particles, and soluble gases to a minimum. In the use of analytical instruments with high resolution and low detection limits, the water used as a blank Blank must be high purity water.
What is the difference between GB33087 and GB6682?
1. Different specificity The three levels of pure water defined by GB6682 are applicable to different fields:
Primary water is applied to analytical tests with strict requirements;
Secondary water is applied to inorganic trace analysis tests;
The tertiary water is used in general chemical analysis experiments.
GB33087 is for water used in instrumental analysis to reduce blank signals.
2. Different types and specifications of parameters required GB6682 has requirements on pH range, conductivity, oxidizable substance content, absorbance, evaporation residue and soluble silicon.
GB33087 has requirements for resistivity, total organic carbon, sodium ion, chloride ion, silicon, and total bacteria.
Even with the same parameters, the required specifications are different. Taking the resistivity as an example, the highest level of water in GB6682 has a resistivity of 10 MΩ.cm (25 °C); while the high-purity water resistivity required by GB33087 is 18.0 MΩ.cm (25 °C), compared with GB6682. Water ion impurities are approximately 20 times higher than GB33087 high purity water.
3. The requirements for the containers used for sampling and testing are different. GB33087 will use a more professional sampling container.
4. Different reference standards
The GB6682 standard is derived from ISO3696: 1995 Water for analytical laboratory use - Specification and test methods;
GB33087 refers more to ASTM D 1193 - 06 Standard Specification for Reagent Water.
Why is silicon content a very important indicator? Â
Silicates as inorganic weak acid anions (including borate, etc.) have low dissociation constants and poor electrical conductivity, and it is difficult to accurately detect their contents by a conventional resistivity detector. Therefore, the silicon content is usually used to characterize the content of such (silicate, borate and other) impurities, which can more accurately reflect the purity of ultrapure water.
There are two ways to effectively remove this type of impurity:
1. EDI continuous current deionization technology, removal efficiency High-Maple Genie G, Genie E and Direct-Pure Genie, Direct-Pure EDI and other hosts use IonPure's EDI module, the water quality is stable, and the cost of use is low.
2. Dedicated ion exchange resin to remove Lefeng's low boron type purification column, using specific ion exchange resin, can effectively remove impurities such as silicon and boron in water. Lefeng is currently the only domestic supplier to provide this type of purification column.
Does the water quality of Lefeng pure water meet this standard?
Lefeng's products have been tested at the Shanghai Metrology and Testing Technology Research Institute. Lefeng's ultrapure water system produces water that fully meets the technical specifications of GB/T 33087-2016.
About Shanghai Lefeng Biotechnology Co., Ltd.
Shanghai Lefeng Bio is specialized in the research, development, design and manufacture of high-end water purification and laboratory separation and purification products, and is committed to providing cutting-edge, high value-added innovative products for life sciences and biotechnology. The Lefeng product line includes laboratory pure water systems, Millipore pure water compatible consumables and laboratory separation and purification filtration products. Established ten years ago, Lefeng created its own brand RephiLe (Ruifeng), with more than 30 patents and multiple software copyrights. Products are sold to nearly 90 countries and regions around the world. For more information on RephiLe products, please visit: Le Feng official website
Pay attention to RephiLe Enterprise WeChat: Le Feng pure water, pay attention to Le Feng dynamic!
Le Feng article keywords: pure water, deionized water, DI water, distilled water, reverse osmosis water, RO water, ultra pure water, EDI, filtration, needle type, sterile, HPLC, ICP-MS, AAS, LC-MS , biochemical analyzer, sequencing, NGS high-throughput sequencing, clinical, aging machine, bottle washer, ion chromatography, membrane, air filtration, carbon dioxide incubator, fermenter
Rabies vaccine is an active immunizing agent used to prevent infection caused by the rabies virus. The freeze-dried vaccine is more stable, which is much safer for the patients to receive.
Freeze Dried Vaccine,Rabies Vaccine Oral,Freeze Rabies Antibody,Freeze Anti Rabies Vaccine
Changchun Zhuoyi Biological Co., Ltd , https://www.zhuoyibiological.com