To Improve Dipstick Diagnostic and Environmental Tests, Just Add Tape (image) American Chemical Society Share Print E-Mail Caption The chemical symbols for heavy metals appear when a new low-cost, tape-based sensor detects them in water or powder. 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.