The composition of maja leaf extract (Aegle marmelos) and silica gel for urea biosensor

International Symposium on Current Progress in Functional Materials

Triana, Y.^1 ; Hutapea, T.P.H.^2 ; Kurniawan, F.^3

Material and Metallurgical Engineering Department, Kalimantan Institute of Technology, Jl Sukarno Hatta KM. 15, Karang Joang, Kalimantan Timur, Balikpapan

76127, Indonesia^1

Faculty of Fisheries and Marine, University of Borneo Tarakan, Jl Amal Lama No 1, Tarakan, Kalimantan Utara, Indonesia^2

Chemistry Department, Institut Teknologi Sepuluh Nopember, Surabaya, Jawa Timur

60111, Indonesia^3

关键词: Aegle marmelos;    Anodic currents;    Leaf extracts;    Optimum composition;    Paste composition;    Silver electrode;    Urea biosensors;    Urease enzymes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012040/pdf
DOI  :  10.1088/1757-899X/188/1/012040

来源: IOP

【 摘 要 】

In this work, we used Indonesian-naturalized plant, Maja (Aegle marmelos) leaf extract instead of urease enzyme for urea sensor. Maja leaf extract, silica gel, and paraffin were mixed until homogenous, and then pasted to the tip of the silver wire, which was tightly covered by glass tube to assemble a silica gel-Maja leaf extract modified silver electrode. Cyclic voltammetry showed that cathodic and anodic current signals were observed at 0.4 V and 0.625 V, respectively. The optimum composition of silica and Maja leaf extract were also investigated. The best response was observed at the paste composition ratio of silica gel and paraffin of 3:2, with 0.05 gr total weight and 0.03 gr Maja leaf extract.