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All Journal Jurnal Ilmu Kimia Universitas Brawijaya
Putra, Dedi Arta
Brawijaya University
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Journal : Jurnal Ilmu Kimia Universitas Brawijaya

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PEMBUATAN ELEKTRODA SELEKTIF ION KADMIUM TIPE KAWAT TERLAPIS BERMEMBRAN D2EHPA Putra, Dedi Arta; Atikah, Atikah; Sulisyarti, Hermin
Jurnal Ilmu Kimia Universitas Brawijaya Vol 2, No 2 (2013)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Abstract

ABStract Preparation  of coated wire cadmium(II) ion selective electrodes Cd(II) CWE) membranous Di (2-Ethyl Hexyl) Phosporic Acid (D2EHPA) has been done to obtain the optimum membrane composition ratio and optimum soaking time that produce cadmium(II) CWE have Nerntstian character. Preparation  of cadmium(II) CWE was conducted by three kinds of membrane composition comprising an active ingredient D2EHPA, matrix material consist of polyvinylchloride (PVC) polymer and plasticizer dibutylphtalate (DBP) dissolved in tetrahydrofuran (THF) solvent with a ratio of 1:3 by weight/volume. Potential measurements made​​ in the CdCl2test solution in the concentration range10-8-10-1M at pH 5. Optimization of time soaking in a solution of CdCl2 0.1M performed at optimum membrane composition in the time range of 0-80 minutes with 10 minutes intervals. The results showed that the optimum composition of the membrane is a membrane with the composition ratio  of D2EHPA : PVC : DBP = 16 : 28 : 56 produces Nernstian properties with prices Nernst factor of 27.26mV/decade of concentration needed optimum soaking time in a solution of CdCl2 0.1M for 20 minutes.   Key words: cadmium CWE, D2EHPA, membrane, potentiometry
Co-Authors Atikah, Atikah Sulisyarti, Hermin