Sains Malaysiana 55(2)(2026): 245-255

http://doi.org/10.17576/jsm-2026-5502-05

 

Fabrication of Lead(II) Ion-Selective Electrode (Pb-ISE) Based on Photopolymerization of Metyl Methacrylate-Tetrahydrofurfuryl Acrylate (MT) Copolymer Thin Films

(Fabrikasi Elektrod Pemilih Ion Plumbum(II) (Pb-ISE) Berasaskan Fotopempolimeran Filem Nipis Kopolimer Metil Metakrilat-Tetrahidrofufuril Akrilat (MT))

 

SAGIR ALVA^1,*, I GUSTI AYU ARWATI¹, MUHAMMAD FITRI¹, RITA SUNDARI¹, IRWANA NAINGGOLAN^2,3 & TULUS IKHSAN NASUTION⁴

 

¹Mechanical Engineering Department, Faculty of Engineering, Universitas Mercubuana, Jl. Meruya Selatan No 1, West Jakarta- Jakarta, Indonesia, 11650

²Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan, 20155, Sumatera Utara, Indonesia

³Center of Excellent Chitosan and Advance Materials, Universitas Sumatera Utara, 20155, Medan, Indonesia

⁴Department of Physics, Faculty of Mathematics and Natural Science, Universitas Sumatera Utara, Medan 20155, Sumatera Utara, Indonesia

 

Received: 21 September 2024/Accepted: 24 January 2026

 

Abstract

The fabrication of lead(II)-ion selective electrode (Pb-ISE) that uses a methyl methacrylate (MMA)-tetrahydrofurfuryl acrylate (THFA) copolymer membrane, known as MT, was successfully done. In this study, MT copolymer membranes were fabricated using a photopolymerization technique with an optimal ratio of MMA: THFA of 2:8 (MT28). The diffusion coefficient of MT 28 copolymer was 1.05 × 10^-8 cm²/s and the Nernstian number value was 27.2 mV/dec. Furthermore, the linear range produced by Pb-ISE using MT28 ranges from 0.1 to 10^-6 M and has a limit detection (LoD) value of 5.37 × 10^-7 M. The selectivity coefficient test (LogK^pot_a,b) was carried out using separated solution methods (SSM) on five interfering ions consisting of K⁺, Na⁺, Mg²⁺, Cd²⁺, and Cu²⁺. The LogK^pot_a,b values obtained respectively were -6.64 ± 0.14, -6.10 ± 0.07, -12.20 ± 0.16, -6.07 ± 0.15 and -4.23 ± 0.17. The Pb-ISE based on MT28 copolymer has a working area at pH 3-9 and also shows the same good performance as testing using standard Pb²⁺ ion measurements using Atomic Absorption Spectroscopymetry (AAS) referring to SNI 06–6989.8-2004.

Keywords: Lead (II); ion-selective electrode; photopolymerization; methyl methacrylate; tetrahydrofurfuryl acrylate

 

Abstrak

Fabrikasi elektrod pemilih ion plumbum(II) (Pb-ISE) yang menggunakan membran kopolimer metil metakrilat (MMA)-tetrahidrofurfuril akrilat (THFA) atau dikenali sebagai MT telah berjaya dijalankan. Membran kopolimer MT telah difabrikasi menggunakan kaedah fotopempolimeran dengan nisbah optimum MMA:THFA 2:8 (MT28). Pekali resapan kopolimer MT 28 yang diperoleh ialah 1.05 × 10^-8 cm²/s dan nilai nombor Nernstian ialah 27.2 mV/dec. Tambahan pula, julat linear yang dihasilkan oleh Pb-ISE menggunakan MT28 adalah antara 0.1 hingga 10^-6 M dan mempunyai nilai pengesanan had (LoD) 5.37 × 10^-7 M. Ujian pekali pemilihan (LogK^pot_a,b) telah dijalankan menggunakan kaedah larutan terpisah (SSM) ke atas lima ion gangguan yang terdiri daripada K⁺, Na⁺, Mg²⁺, Cd²⁺ dan Cu²⁺. Nilai LogK^pot_a,b yang diperoleh masing-masing ialah -6.64 ± 0.14, -6.10 ± 0.07, -12.20 ± 0.16, -6.07 ± 0.15 dan -4.23 ± 0.17. Pb-ISE berasaskan kopolimer MT28 mempunyai kawasan kerja pada pH 3-9 dan juga menunjukkan prestasi baik yang sama seperti ujian menggunakan kaedah piawai Spektroskopi Penyerapan Atom (AAS) untuk   ion Pb²⁺ merujuk kepada SNI 06–6989.8-2004.

Kata kunci: Elektrod pemilih ion; metil metakrilat; pemfotopolimeran; plumbum(II); tetrahidrofurfuril akrilat

 

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*Corresponding author; email: sagir.alva@mercubuana.ac.id