Effect of crown-ether surfactants on flame atomic absorption and flame emission signals of some monovalent cations |
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| Authors: | Timothy J. Ward Daniel W. Armstrong Bronislaw P. Czech Jacek F. Koszuk Richard A. Bartsch |
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| Affiliation: | Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79406 U.S.A. |
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| Abstract: | Two surface-active and one surface-inactive 18-crown-6 derivatives were synthesized and evaluated for their abilities to enhance flame atomic absorption and flame emission signals of monovalent cations. Enhancement of potassium signals were noted for the surface-active compounds but not for the surface-inactive compound. The critical micelle concentration was determined and compared to the degree of enhancement. Surfactant-induced signal enhancements are not due to the slight or moderate decrease in the size of the aerosol first produced in the nebulizing chamber. Additional mechanistic considerations are discussed. |
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