Afriansyah, Arif (2011) Pembuatan dan Karakterisasi Elektroda Selektif Ion Tetraborat Tipe Kawat Terlapis Bermembran Kitosan. Sarjana thesis, Universitas Brawijaya.
Abstract
Tujuan penelitian ini adalah membuat dan mengkarakterisasi Elektroda Selektif Ion (ESI) tetraborat tipe kawat terlapis. ESI tetraborat terbuat dari kawat Platina (Pt) sebagai konduktor elektronik, membran yang dilapiskan pada kawat Platina dibuat dari campuran kitosan, polivinil klorida (PVC) dan dioktilftalat (DOP) yang dilarutkan dalam pelarut tetrahidrofuran (THF) dengan perbandingan membran : THF sebesar 1 : 2,67 (b/b). Dalam penelitian ini, dilakukan optimasi komposisi membran dan waktu perendaman membran dalam larutan Na2B4O7 0,2 M pada rentang waktu 10, 20, 30, 40, 50, 60, 70, 80, dan 90 menit yang menghasilkan sifat yang Nernstian. Larutan Na2B4O7 pada rentang konsentrasi 1x10-8 – 1x10-1 M diukur pada pH 5 menggunakan bufer fosfat. Karakteristik sifat dasar ESI tetraborat yang diuji meliputi : faktor Nernst, kisaran konsentrasi linier, limit deteksi, waktu respon, dan usia pemakaian. Hasil penelitian menunjukkan komposisi optimum membran yaitu kitosan : PVC : DOP = 3 : 2 : 5 (bagian) dalam pelarut THF dengan perbandingan membran : THF sebesar 1 : 2,67 (b/b). Waktu perendaman optimum membran selama 30 menit. Karakter dasar ESI tetraborat bersifat Nernstian (harga faktor Nernst sebesar 29,18 ± 0,12 mV/dekade konsentrasi) pada kisaran konsentrasi 10-1 - 10-5 M, batas deteksi pengukuran yaitu 3,715x10-6 M (0,71 ppm tetraborat), waktu respon 110 detik, dan usia pemakaian selama 38 hari.
English Abstract
The aim of this research is to construct and characterize coated wire tetraborate ion selective electrode (CWE). Tetraborate CWE consist of Platinum (Pt) wire as conductor, membrane which is directly coated on Platinum wire was made from a mixture of chitosan, polyvinylchloride (PVC) and dioctilphtalate (DOP) which was dissolved in tetrahydrofuran (THF) solvent with ratio membrane : THF of 1 : 2.67 (w/w). In this research, the optimation of membrane composition and soaking time in Na2B4O7 0.2 M solution in time range of 10, 20, 30, 40, 50, 60, 70, 80, and 90 minutes that resulting Nernstian properties was done. Na2B4O7 in concentration range 1x10-8 – 1x10-1 M solution were measured at pH 5 using phosphate buffer. The basic properties characteristic of tetraborate CWE includes : Nernst factor, linearity response, detection limit, response time, and life time. The result of research showed that the optimum composition tetraborate CWE’s membrane consists (part) of chitosan : PVC : DOP = 3 : 2 : 5 dissolved in THF solvent with ratio membrane : THF of 1 : 2.67 (w/w). The optimum soaking time was 30 minutes. The basic characteristic of tetraborate CWE are Nernstian (the Nernst factor of 29.18 ± 0.12 mV/decade of concentration) in a concentration range of 10-1 - 10-5 M, the detection limit of measurement of 3.715x10-6 M (0.71 ppm tetraborate), response time of 110 seconds, and life time of 38 days.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/MIPA/2011/182/051102080 |
| Subjects: | 500 Natural sciences and mathematics > 540 Chemistry and allied sciences |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Kimia |
| Depositing User: | Unnamed user with email repository.ub@ub.ac.id |
| Date Deposited: | 05 Aug 2011 09:15 |
| Last Modified: | 22 Oct 2021 07:39 |
| URI: | http://repository.ub.ac.id/id/eprint/152637 |
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