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. Author manuscript; available in PMC: 2011 Apr 12.
Published in final edited form as: Inorg Chem. 2009 Nov 15;38(23):5449–5452. doi: 10.1021/ic990135+

Table 1.

Percent Extraction of Alkaline Earth Metal Ions from Water to CHCl3 at pH 8.90 and 25 °C

percent extraction
ionophore Mg2+ Ca2+ Sr2+ Ba2+ Ra2+
3 <0.1 15.6 73.5 98.7 >99.9
4 <0.1 12.7 78.3 99.2 >99.9
5 12.4 17.8 13.8 12.5 13.4
6 93.8 92.5 90.3 87.0 89.0