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What is EN ISO 7031:2016

EN ISO 7031:2016 is a technical standard that defines a method for the determination of pH in water. It provides guidelines and procedures for accurately measuring the acidity or alkalinity of aqueous solutions. This standard is widely used in various industries, including environmental, pharmaceutical, and food and beverage.

Importance of pH Measurement

pH measurement plays a crucial role in many applications. It is essential for monitoring water quality, as it indicates the presence of acidic or basic substances that may be harmful to the environment or human health. In the pharmaceutical industry, pH monitoring is vital during manufacturing processes to ensure product safety and efficacy. Similarly, in the food and beverage industry, accurate pH measurement guarantees product consistency and ensures compliance with regulatory standards.

Principles of EN ISO 7031:2016

The EN ISO 7031:2016 standard outlines the principles of pH measurement using glass electrode in combination with a reference electrode. The method follows a potentiometric approach, where the potential difference between the electrodes is measured and converted into pH values. It specifies the requirements for calibration, measurement uncertainty, and the maintenance of the electrodes, ensuring reliable and consistent results.

Procedure for pH Measurement

To perform pH measurement according to the EN ISO 7031:2016 standard, the following steps are typically followed:

1. Calibrate the pH meter using at least two buffer solutions with known pH values. This ensures accuracy and traceability of the measurement.

2. Immerse the electrodes in the sample solution, making sure they are properly cleaned and conditioned beforehand.

3. Allow sufficient time for the pH values to stabilize and then record the readings. Take multiple measurements to ensure precision.

4. Clean and store the electrodes properly after use, following the manufacturer's recommendations.

In conclusion, EN ISO 7031:2016 is a standard that provides a reliable method for pH measurement in water. Its principles and guidelines ensure accuracy and consistency, making it indispensable in various industries. By following this standard, organizations can effectively monitor and control pH levels, guaranteeing the quality and safety of their products and processes.


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