1. Department of Chemistry, California State University, San Bernardino, California 92407, Southern California Coastal Water Research Project, 7171 Fenwick Lane, Westminster, California 92683, State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, and Henry Samueli School of Engineering, University of California, Irvine, California 92697