A significant breakthrough in water analysis technology

Affinity Water has announced a significant advancement in water analysis with the development of a segmented flow system for the precise measurement of Total Cyanide in drinking water and natural waters. This innovative system, utilising an on-line UV digestion module and amperometric detection by Systea®, was supplied by Lab Solutions, and ensures accurate and reliable results.

The World Health Organization (WHO) underscores the critical importance of stringent cyanide monitoring due to its acute toxicity. The Water Supply (Water Quality) Regulations prescribe a limit of 50 µg/L for total cyanide in drinking water, which is considerably lower than the WHO’s short-term exposure health-based value.

To meet these stringent regulatory requirements, Affinity Water laboratories have selected the Systea® analyser, employing the ASTM D7511-09E2 method. This method involves UV digestion to break down complex cyanides into CN- ions, followed by amperometric detection for precise measurement.

A crucial aspect of this method’s success is the use of thiosulphate as a dechlorinating agent, ensuring accurate results even in waters disinfected using chloramination. The method boasts a working range of 0-20 µg/L and a low limit of quantification of 28 µg/L.

Affinity Water is committed to maintaining the highest water quality standards and is in the process of accrediting this method under ISO 17025-DWTS. This demonstrates the company’s dedication to providing safe and high-quality drinking water to its consumers.