The Impact of Water-Soluble Humic Acids on Extraction-Photometric Determination of Anionic SAS with Methylene Blue in Natural Waters

摘要

The estimation of possible applications of the standard extraction-photometric method for determining anionic SAS by using methylene blue has been performed during the analysis of dyed natural waters. It is shown that humic acids significantly affect the adequate determination of anionic SAS by the specified method. The ways of eliminating the harmful influence of humic acids during the analysis of natural objects are also proposed.