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[Chemical Knowledge]：Detection Method and Analysis Technology of Sodium Hypochlorite

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Sodium hypochlorite's importance and application

Sodium hypochlorite, as an important disinfectant and bleach, is widely used in industrial production, health care, daily household cleaning and other fields. Its main function is to kill bacteria, viruses and other microorganisms, remove organic and oxidizing substances in water, and bleaching and decontamination.

In water treatment, sodium hypochlorite is often used for disinfection to ensure the safety of drinking water and swimming pool water. In the medical and health field, it is used to disinfect surgical instruments, surfaces and the environment to prevent cross-infection. In daily life, sodium hypochlorite can be used to bleach clothes, clean kitchens and bathrooms, etc.

Although sodium hypochlorite plays an important role in various fields, if it is used improperly or the concentration is too high, it may cause certain safety hazards. Therefore, accurate detection of sodium hypochlorite concentration is particularly important.

Sodium hypochlorite detection method and analysis technology

To ensure the safe use of sodium hypochlorite, scientists have developed various detection methods and analytical techniques to accurately measure its concentration. Here are a few common methods:

Iodine titration: This is a common analytical method that uses the principle of iodine reacting with sodium hypochlorite under acidic conditions to form iodine chloride to determine the concentration of sodium hypochlorite. The method is simple and easy to use, and is suitable for laboratory and industrial sites.

Electrochemical methods: including potentiometric titration, polarography and electrochemical sensors, using sodium hypochlorite on the electrode surface of the redox reaction to determine its concentration. These methods have the advantages of high sensitivity and simple operation, and are suitable for real-time monitoring and automatic control.

Spectral analysis: including ultraviolet-visible absorption spectroscopy and fluorescence spectroscopy, etc., using the absorption or emission characteristics of sodium hypochlorite at specific wavelengths to quantitatively analyze. These methods usually require instrumental support, but have high sensitivity and selectivity.

Colorimetric method: the use of sodium hypochlorite and some indicator or substrate reaction to produce color change, by colorimetry or colorimeter determination of its concentration. This method is simple and suitable for rapid detection and field application.

In addition to the above methods, there are many new detection technologies emerging, such as nanomaterial-based sensors, microfluidic chip technology, etc., which provide more options and possibilities for the detection of sodium hypochlorite.

As an important chemical, sodium hypochlorite plays an important role in various fields. In order to ensure its safe use, accurate detection of its concentration is essential. The continuous improvement of various detection methods and analysis technology provides us with more choices and possibilities, helping us to better control and manage the use of sodium hypochlorite, and protect people's health and safety.

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