SEPARATION OF STRONTIUM ION FROM A LARGE AMOUNT OF CALCIUM ION BY THE USE OF A MACROCYCLIC ETHER

Abstract

Abstract A small amount of Sr2+ (0.7∼20 mg) was simply separated from a large amount of Ca2+(1.5 g) by liquid–liquid extraction using dicyclohexyl-18-crown-6 chloroform solution. Average recovery of Sr2+ was 97 %, and the amount of Ca2+ in the final strontium fraction of the separation was decreased to 10−4∼10−5 part of the initial amount.