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List of Articles Ali Niazi 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 - 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 3 - 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 Open Access Article Abstract Page Full-Text 4 - Preconcentration based dispersive liquid-liquid microextraction for spectrophotometric determination of zinc in natural water and human blood after multivariate optimization based on Box-Behnken design Ali Niazi Mona Akbari Roza Negahdari Maryam Sarkhosh Asiyeh Khosravi