Ion Mobility of Complexonates

Ion mobilities of silver, cobalt, zinc, gadolinium and europium and their complexonates with NTA, EDTA and DTPA are determined. It is shown that – contrary to the published data the ion mobility of complexonates does not depend on the mobility of the central cation; – complexonates with equal charges show similar mobilities, the deviation being not more than 15% of the average value; – a tendency for the ion mobility to decrease with increasing molecular weight of the complexonate is observed.