EUROLAB laboratory provides testing and compliance services within the scope of ISO 9963 standard. Specifies a method for the titrimetric determination of alkalinity. It is designed for the analysis of natural and purified water and wastewater and can be used directly for water with an alkalinity concentration of up to 20 mmol/l.
For samples with higher concentrations of alkalinity, a smaller test portion may be used for analysis. The recommended lower limit is 0,4 mmol/l.
The sample is titrated with standard acid solution to fixed pH endpoint values of 8,3 and 4,5. These endpoints, determined visually or potentiometrically, are the equivalence points chosen to identify the three main components: hydrogen carbonate, carbonate and hydroxide.
The pH 8,3 endpoint is close to equivalent carbonate and carbon dioxide concentrations and represents a titration of approximately all hydroxide and half of the carbonate present.
This pH 4,5 endpoint approaches the equivalence point for the hydrogen ion and hydrogen carbonate and allows the total alkalinity of the sample to be determined.
EUROLAB assists manufacturers with ISO 9963 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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