How to Prevent Water Quality Degradation During Pure Water Storage

In the laboratory, the storage of pure water in ultrapure water systems is an easily overlooked yet crucial step. Many researchers have found that the high-purity water obtained through precise processing deteriorates in quality after a period of storage, potentially affecting the accuracy of experimental results. The main reasons for this deterioration include microbial growth, the intrusion of airborne pollutants, and leaching from the storage container material. To address these issues, we can take the following measures to effectively prevent water quality degradation during storage:

I. Choosing a Suitable Storage Container

The material and design of the storage container directly affect the storage quality of pure and ultrapure water. Traditional storage containers may release impurities into the water due to material limitations, or their inner walls may easily breed microorganisms, leading to water contamination.

The importance of the breather in a pure water tank is self-evident. It maintains pressure balance inside and outside the tank while preventing airborne pollutants such as dust, microorganisms, and carbon dioxide from entering. The breather in the UPU double-layer PE sterile water tank undergoes special filtration treatment, effectively filtering out airborne pollutants and ensuring clean air entering the tank, thus safeguarding water quality.

II. Controlling the Storage Environment

The temperature, humidity, and cleanliness of the storage environment can affect the quality of pure and ultrapure water.

First, the storage area should be kept clean and hygienic, and disinfected regularly to reduce the content of microorganisms and dust in the air. Second, the temperature should be controlled within a suitable range, generally recommended to be between 15-25℃. Excessively high temperatures will accelerate the reproduction of microorganisms and may also cause changes in the material of the storage container, affecting water quality. In addition, avoid storage areas with odors or corrosive gases, as these can contaminate pure and ultrapure water.

III. Standardizing Storage Operations

Standardized storage operations are crucial to preventing water quality degradation. The UPU double-layer PE sterile water tank is easier to clean, providing convenient conditions for standardized operations and reducing the risk of water contamination due to incomplete cleaning. During storage, minimize the number of times the water tank is opened to prevent excessive entry of outside air. After each opening, it should be closed promptly to prevent contaminants from entering. At the same time, pay attention to the water quality in the tank. If any abnormalities are found, address them promptly to avoid affecting subsequent use. Furthermore, pure water should not be stored for too long; store it appropriately according to the amount used.