%0 Journal Article %T Pre-Concentration and Determination of β-Blockers Using Carbon Nanotube-Assisted Pseudo-Stirbar Hollow Fiber... %A Sarafraz Yazdi, Ali %A Mohamad Reza Abedi %A Zarrin Eshaghi %J Journal of Liquid Chromatography and Related Technologies %@ 1082-6076 %D 2013