title: Development of a novel pH sensor based upon Janus Green B immobilized on triacetyl cellulose membrane: Experimental design and optimization.
abstract: A novel pH optical sensor was prepared by immobilizing an azo dye called Janus Green B on the triacetylcellulose membrane. Condition of the dye solution used in the immobilization step, including concentration of the dye, pH, and duration were considered and optimized using the Box-Behnken design. The proposed sensor showed good behavior and precision (RSD<5%) in the pH range of 2.0-10.0. Advantages of this optical sensor include on-line applicability, no leakage, long-term stability (more than 6 months), fast response time (less than 1 min), high selectivity and sensitivity as well as good reversibility and reproducibility.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Islamic Azad University, Arak Branch, Arak, Iran.
authors.forename: Narges
authors.initials: N
authors.lastname: Chamkouri
authors.affiliation: Department of Chemistry, Faculty of Sciences, Islamic Azad University, Arak Branch, Arak, Iran. Electronic address: a-niazi@iau-arak.ac.ir.
authors.forename: Ali
authors.initials: A
authors.lastname: Niazi
authors.affiliation: Department of Chemistry, College of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran.
authors.forename: Vali
authors.initials: V
authors.lastname: Zare-Shahabadi
keywords: Box–Behnken design; Janus Green B; Triacetylcellulose membrane; pH optical sensor