“…In recent years, several analytical methods have been developed to detect DNA bases, such as microchip capillary electrophoresis (Wang et al, 2004), flow injection chemiluminescence (Liu and Xue, 2006), ionpairing liquid chromatography (Ganzera et al, 2006), laser-induced fluorescence detection (Wang et al, 2008), and micellar electrokinetic chromatography . Although these methods exhibit some merits and advantages, expensive instruments, complicated operations, or time-consuming sample pretreatments are usually involved (Sun et al, 2009).…”