GPC vs. PR (IMAGE) University of South Carolina Caption Purification of semiconductor quantum dots is much more effective with gel-permeation chromatography that with the traditional precipitation-redissolution technique. Credit American Chemical Society Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.