The method describes how to determine the boron content of water photometrically with a cuvette test.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
Borate ions react with azomethine-H, forming a yellow substance which can be measured photometrically. This method is suitable for analyzing samples collected from surface water and wastewater. Comparison with a sample-specific blank compensates for any minor coloration in water samples that may influence the analysis. Turbidity, which may interfere with the photometric determination, can be eliminated by pouring the water sample through a membrane filter.