“…Analytical methods hitherto reported for the determination of SAL include high performance liquid chromatography (Pichon, Venisse, Krupka, Perault-Pochat, & Denjean, 2006), gas chromatography-mass spectrometry (Ouyang et al, 2005), spectrophotometry (El-Enany, Bela, & Rizk, 2004;Basavaiah & Prameela, 2003), capillary electrophoresis (Felix et al, 2006;Sirichai & Khanatharana, 2008;Lodén, Pettersson, Arvidsson, & Amini, 2008), flowinjection analysis-chemiluminescence (Zhou, Zhang, He, & Xiong, 2005;Karuwan et al, 2009), immunosensor (Dudak & Boyaci, 2007) etc. Many of these techniques are expensive or require time-consuming derivatization steps (Pichon et al, 2006;Ouyang et al, 2005).…”