Cyanide Detector (image) Indiana University Caption A ball-and-stick model of the detector is shown at upper left. After cyanide (CN-) reacts with the colorless detector, the detector will emit visible light when illuminated with ultraviolet or "black" light. Credit Dongwhan Lee Usage Restrictions Users of this image must credit 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.