Asymmetric Adsorption of Alanine by Quartz

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Science  11 Oct 1974:
Vol. 186, Issue 4159, pp. 143-144
DOI: 10.1126/science.186.4159.143


Radioactive D- and L-alanine hydrochloride in 10-5 molar dimethylformamide solution was adsorbed by d- and 1-quartz to the extent of 20 to 30 percent, as shown by radioactivity loss. d-Quartz preferentially adsorbs D-alanine and 1-quartz adsorbs L-alanine. The extent of asymmetric preferential adsorption is about 1.0 to 1.8 percent, at the 99.9 percent confidence level.