“…By now, there have been many papers involving HPLC (Carbras, Melini, & Spanedda, 1990;Chou, Hwang, & Lee, 2003;Ehling, Tefera, & Ho, 2007;Muñiz-Valencia et al, 2008;Sun, Wang, Ai, Liang, & Wu, 2010;Wei, Wang, Zeng, Chen, & Liu, 2009;Yokley, Mayer, Rezaaiyan, Manuli, & Cheung, 2000), (Andersen et al, 2008;Filigenzi, Tor, Poppenga, Aston, & Puschner, 2007;Sancho, Ibanez, Grimalt, Pozo, & Hernandez, 2005;Sherri, Christine, & Cristina, 2008; Web references, LC/MS/ MS), GC/MS (Bardalaye, Wheeler, & Meister, 1987;Toth & Bardalaye, 1987;Yokley et al, 2000;Zhu et al, 2009) and other method (Yu, Zhang, Dai, & Ge, 2009) for the determination of CA and/or MA in various matrixes, including Chinese cabbage, chard, protein sources, pet food, meat, fish, and soil. Though these methods could qualitatively and quantitatively determine the two analytes, they were time-consuming and expensive instruments required compare to ELISA.…”