An Analytical Method for Total Heavy Metal Complexing Agents in Water and Its Application to Water Quality Studies.

摘要

The report describes the development of several methods of analysis for low levels of complexing agents,particularly chelating agents. The first method developed,was an atomic absorption analysis of strong heavy metal chelating agents. This method is based upon the fact that when copper ion is added to a water sample and the pH adjusted to 10,the only copper that remains in solutioo is that which is in a complexed or chelated form. The method was used on a number of natural water samples. The method was extended to the analysis of cyanide ion. A new method was developed in which the copper is solublized from a copper-containing chelating ion exchange resin. This method is much more rapid than the first method described,and it is applicable to automated procedures and as a detection system for chelating agents separated by liquid chromatography.