Determination of Diuretics in Urine Using Immobilized Multi-Walled Carbon Nanotubes in Hollow Fiber Liquid-Phase Microextraction Combined with Liquid Chromatography-Tandem Mass Spectrometry. - Ho, Tse-Tsung; Li, Zu-Guang; Lin, Hui-Yi; Lee, Maw-Rong (Journal of the Chinese Chemical Society, 2013)