What is ISO 7027:2018?

ISO 7027:2018 is an international standard that defines the measurement method for turbidity in water. Turbidity refers to the cloudiness or haziness of a liquid caused by suspended particles such as sediment, algae, or microscopic organisms. The standard provides guidelines and specifications for measuring turbidity accurately and consistently.

Importance of Measuring Turbidity

Turbidity is an essential parameter in water quality analysis as it directly impacts the aesthetic appeal, safety, and usability of water. High levels of turbidity can indicate potential health risks and affect the effectiveness of water treatment processes. By measuring turbidity, authorities can ensure compliance with regulations and monitor any changes in water quality over time.

Turbidity Measurement Principles

The ISO 7027:2018 standard outlines two main methods for turbidity measurement: nephelometric and formazin-based. Nephelometry measures the intensity of scattered light at a fixed angle while formazin-based methods use a prepared suspension of particles to calibrate the instrument. Both methods offer reliable and accurate results, and their choice depends on specific applications and instrument capabilities.

Instrumentation and Calibration

To measure turbidity accurately, specialized instruments called turbidimeters are used. These devices emit light into a water sample and measure the amount of light scattered or absorbed by the suspended particles. It's crucial to calibrate turbidimeters regularly using standardized suspensions and verify their performance against reference materials to ensure accurate readings.

In conclusion, ISO 7027:2018 establishes guidelines for measuring turbidity in water, which is a critical parameter for assessing water quality. By following this standard, analysts, researchers, and authorities can obtain consistent and reliable results to monitor and maintain water safety. Implementing proper turbidity measurement procedures helps ensure the provision of clean and safe water for various applications.