Fidget Spinner as Centrifuge Separates Blood Plasma (Video) (image) American Chemical Society Share Print E-Mail Caption Fidget spinners can be used to separate blood plasma for diagnostic tests. Click here to watch this Headline Science video. Credit American Chemical Society Usage Restrictions Please credit the American Chemical Society. Share Print E-Mail 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.