List of Articles Biological samples Open Access Article Abstract Page Full-Text 1 - Development of a Simple and Efficient Method for Preconcentration and Determination of Trace Levels of Fexofenadine in Plasma and Urine Samples Vahid Boloori Mahnaz Qomi Foroozan Piroozi Farhad Raofie Open Access Article Abstract Page Full-Text 2 - Microextraction and Determination of Diclofenac in Biological Samples using Hollow Fiber Liquid Phase Microextraction Technique Coupled with HPLC-UV Mohammad Reza Saadat Mahnaz Qomi Sahel Emadzadeh Marjan Gholghasemi Open Access Article Abstract Page Full-Text 3 - Applicability of phenylpiperazine dithiocarbamate in the determination of As(III) in natural water and biological samples by differential pulse anodic stripping voltammetry Neelam Sreedhar Puthalapattu Prasad Open Access Article Abstract Page Full-Text 4 - Measurement and Preconcentration of Trace Amount of Ondansetron in Biological Samples by Liquid Phase Extraction and Solvent Bar Ali Armoun Mahnaz Gomi seyedali sobhanian