List of Articles Spectrophotometric Open Access Article Abstract Page Full-Text 1 - Simultaneous spectrophotometric determination of ampicillin and penicillin in human plasma using multivariate calibration Ali Niazi Elham Janforozadeh Tahereh Momeni-Isfahani Neda Khorshidi Open Access Article Abstract Page Full-Text 2 - Sensitive and spectrophotometric methods for the determination of Azathioprine in tablets using indigo carmine and methyl orange Smita Sharma Mukesh Sharma Open Access Article Abstract Page Full-Text 3 - Simultaneous spectrophotometric determination of lidocaine and hydrocortisone acetate in pharmaceutical preparations by multivariate calibration methods Amir H.M. Sarrafi Manochehr Bahmaei Assieh Z. Mousavi Open Access Article Abstract Page Full-Text 4 - Design novel optical sensor for determination of bismuth based on immobilization of 4-(4-nitrophenyl)-1-naphthol on a triacetylcellulose membrane Ali Niazi Shiva Karimi Afshar Open Access Article Abstract Page Full-Text 5 - Vanadium (IV and V) speciation with a catechol derivative and tetrazolium salt Kiril Blazhev Gavazov Petya Racheva Vanya Dimitrova Lekova Atanas Nikolov Dimitrov Open Access Article Abstract Page Full-Text 6 - Spectrophotometric determination of uranium in water samples after cloud point extraction using nonionic surfactant Triton X-114 Ali Niazi Ahmad Akrami Elham Sinka Karimi Fatemeh Bagheban Shahri