22/30457249 DC

This standard 22/30457249 DC BS EN 17899. Water quality. Spectrophotometric determination of chlorophyll-a content by ethanol extraction for the routine monitoring of water quality is classified in these ICS categories:

• 13.060.70 Examination of biological properties of water
• 71.040.50 Physicochemical methods of analysis

This document describes a spectrophotometric method for determining the chlorophyll-a content as a measure of the amount of phytoplankton for all types of water. Assuming a maximum sample volume of 2 l, chlorophyll-a content values of 5 µg/l or more can be determined. The determination limit can be calculated by each lab individually and it can be as low as 0,5 µg/l using 2 l of sample (or even more) and a 50 mm cuvette.