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Science 13 April 1979:
Vol. 204. no. 4389, pp. 191 - 193
DOI: 10.1126/science.311948
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Articles

Science, Vol 204, Issue 4389, 191-193
Copyright © 1979 by American Association for the Advancement of Science

articles

X-ray absorption edge fine structure of potassium ions in various environments: application to frog blood cells

HW Huang, SH Hunter, WK Warburton, and SC Moss

The edge spectrum is a sensitive probe of local chemistry. Edge spectra of potassium in various chemical environments were measured, and each environment gives a unique edge spectrum. Hydrated potassium has a unique spectrum that is insensitive to counterions. Comparison of the spectra shows that the chemical state of potassium in cells differs appreciably from that in aqueous solutions.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)