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AssigneeBrigham Young University
InventorsJerald S. Bradshaw, Reed M. Izatt, Ronald L. Bruening, James J. Christensen, Robert Alldredge
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A method of selectively and quantitatively removing and concentrating at least one selected ion from a multiple ion solution in which other ions are present is disclosed. The method comprises (a) bringing a complexing agent for the selected ion(s) into contact with the multiple ion solution to remove and concentrate selected ion(s) from the multiple ion solution, wherein the complexing agent is selected from the group of macrocyclic compounds having at least four --A--CH.sub.2 --CH.sub.2 -- groups in which A is selected from O, O--CH.sub.2, S, S--CH.sub.2, N--R and N--R--CH.sub.2 in which R is selected from H, lower alkyl and benzyl, with the macrocyclic compounds further having a hydrocarbon side chain having an end group ##STR1## in which X is selected from the group consisting of lower alkyl, benzyl, phenyl, halogen, O--CH.sub.3, O--C.sub.2 H.sub.5 and O--M, wherein M is selected from the group consisting of sand, silica gel, glass, glass fibers, alumina, zirconia, titania and nickel oxide; (b) removing the multiple ion solution from which the complexing agent has removed the selected ion(s) from the complexing agent having the selected ion(s) complexed therewith; (c) bringing the complexing agent complexed with selected ion(s) into contact with a receiving liquid to break the complex and remove the selected and concentrated ion(s) from the complexing agent; and (d) determining the concentration of selected ion(s) in the receiving liquid from which the concentration of selected ion(s) in the multiple ion solution can be calculated.
The method of selectively and quantitatively removing and concentrating at least one selected ion from a multiple ion solution in which other ions are present, said method comprising:
The process of determining the heavy metal ion(s) content of drinking water which comprises flowing the drinking water in measured quantity through a column packed with a complexing agent for the heavy metal ion(s), wherein said complexing agent is selected from the group of macrocyclic compounds having at least four--A--CH.sub.2 --CH.sub.2 --groups in which A is selected from O, O--CH.sub.2, S, S--CH.sub.2, N--R and N--R--CH.sub.2 in which R is selected from H, lower alkyl and benzyl, with said macrocyclic compounds further having a hydrocarbon side chain having an end ##STR6## in which X is selected from the group consisting of lower alkyl, benzyl, phenyl, halogen, O--CH.sub.3, O--C.sub.2 H.sub.5 and O--M, wherein M is selected from the group consisting of sand, silica gel, glass, glass fibers, alumina, zirconia, titania and nickel oxide;
A method of achieving the selective and qualitative removal of a selected ion or group of ions from a plurality of ions in a multiple ion solution by bringing said solution into contact with a macrocyclic compound selected from the group consisting of ##STR7## and removing the multiple ion solution from which the selected ion or group of ions has been removed from said macrocyclic compound.
Dependencies are inferred from the claim text.