Figure 2 Operating Protocol (IMAGE) Kanazawa University Caption Operating protocol for the on-site analysis of precious metals using LEP-OES coupled with SPE-assisted selective preconcentration. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. 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.