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13702067485
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Address
Haitai International Industrial Base, Binhai High tech Zone, Tianjin, China
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Tianjin Development Zone Rui'er Environmental Protection Technology Co., Ltd
Laboratory Pure water machine
NegotiableUpdate on 01/11
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Overview
The laboratory pure water equipment produced by Tianjin Rui'er Environmental Protection Water Treatment Equipment Company can meet the national standard GB/T6682-2008 for analytical laboratory water. The raw water used for laboratory analysis should be drinking water or water of appropriate purity.
Product Details
Laboratory Pure water machine
The laboratory pure water equipment produced by Tianjin Rui'er Environmental Protection Water Treatment Equipment Company can meet the national standard GB/T6682-2008 for analytical laboratory water.
The raw water used for laboratory analysis should be drinking water or water of appropriate purity.Laboratory Pure water machine
The water used in the analytical laboratory is divided into three levels: first level water, second level water, and third level water.
1. Primary water
First grade water is used for analytical tests with strict requirements, including tests with requirements for particles. Such as water for high-performance liquid chromatography analysis.
Primary water can be distilled or exchanged in a mixed bed using quartz equipment, and then filtered through a 0.2 μ m microporous membrane to produce secondary water.
2. Secondary water
Secondary water is used for inorganic measurement analysis and other experiments, such as using water for atomic absorption spectroscopy analysis. Secondary water can be prepared by multiple distillations or ion exchange methods.
3. Third grade water
Third grade water is used for general chemical analysis experiments.
Third grade water can be produced by distillation or ion exchange methods.
4. Specifications
The specifications of laboratory water for analysis are shown in Table 1.
Table 1: Water Quality Specifications for Laboratory Water Analysis
name |
Level 1 |
secondary |
Level 3 |
PH range (25 ℃) |
-- |
-- |
5.0~7.5 |
Conductivity (25 ℃)/(mS/m) |
≤0.01 |
≤0.10 |
≤0.50 |
Content of oxidizable substances (calculated as O)/(mg/L) |
-- |
≤0.08 |
≤0.4 |
Absorbance (254nm, 1cm optical path) |
≤0.001 |
≤0.01 |
-- |
Evaporation residue (105 ℃± 2 ℃), mg/L |
-- |
≤1.0 |
≤2.0 |
Soluble silicon (calculated as SiO2), mg/L |
≤0.01 |
≤0.02 |
-- |
Note 1: Due to the difficulty in determining the true pH value of primary and secondary water under their purity, there is no regulation on the pH range of primary and secondary water.
Note 2: Due to the difficulty in determining oxidizable substances and evaporation residues at the purity of primary water, there are no regulations on their limits. Other conditions and preparation methods can be used to ensure the quality of primary water.
