Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: The Potentiometric Analysis of Chloride Ion Using Modified Heterogeneous Chitosan Membranes | Journal of Physical Science Vol. 19 1 43-52 2008 43 The Potentiometric Analysis of Chloride Ion Using Modified Heterogeneous Chitosan Membranes Munaratul Aini Yahaya and Sulaiman Ab Ghani School of Chemical Sciences Universiti Sains Malaysia 11800 USM Pulau Pinang Malaysia Corresponding author sag@ Abstract The potentiometric chloride ion selectivity of a polymer membrane based on PVC and chitosan as an active material was investigated. Two dipping solutions were chosen KCl and FeCl3 solution. The selectivity coefficients K PAo Bt for some anions determined by chitosan-CL membrane were in the sequence of Br- r HCO3- NO3- OH SO42- C2O42- with values to Log KP. B to A B and in the order of CO32- HCO3- F ClOf r NO3- IO3- Br- SO42 OH with values to Log KP B to for chitosan-Fe3 membrane. The linear concentration ranges for both membranes were x 10-4 - x 10-1 M Cl-. The optimum pH were and for chitosan-CL and chitosan-Fe3 respectively. There is no significant changes in performance within 60 days for chitosan-CL and 42 days for chitosan-Fe3 . The proposed membrane electrodes showed good agreement with a commercial electrode with correlation coefficient r and for chitosan-CL and chitosan-Fe3 respectively. Keywords chloride chitosan heterogeneous membrane chitosan-Cl chitosan-Fe3 Abstrak Kepilihan ion klorida secara potensiometri suatu membran polimer berasaskan PVC dan kitosan sebagai bahan aktif telah dikaji. Dua larutan celupan T Pot dipilih larutan KCl dan FeCl3. Pekali kepilihan KA B bagi beberapa anion yang ditentukan oleh membran kitosan-Ck adalah dalam turutan Br r HCO3- NO3- Pot OH SO42 C2O42 dengan nilai hingga Log KAB hingga dan dengan turutan CO32- HCO3- F ClO3 I- NO3- IO3- Br- SO42- OH dan nilai hingga Log Kab hingga bagi membran kitosan-Fe3 . Julat linear kepekatan bagi kedua-dua membran ialah x 04 - x 10-1 M CL. Nilai pH .
