Staiger CL, Loy DA, Jamison GM, Schneider DA, Cornelius CJ. A parallel colorimetric method for the rapid discovery and optimization of heterogeneous hydrodesulfurization catalysts. J Am Chem Soc. 2003 Aug 20;125(33):9920–1. doi: 10.1021/ja034222j. PMID: 12914444.