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.

Original languageEnglish
Article number012040
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 2 May 2017
EventInternational Symposium on Current Progress in Functional Materials 2016, ISCPFM 2016 - Bali, Indonesia
Duration: 26 Jul 201627 Jul 2016


  • Aegle marmelos
  • Maja leaf extract
  • silica gel
  • urea
  • urea biosensor


Dive into the research topics of 'The composition of maja leaf extract (Aegle marmelos) and silica gel for urea biosensor'. Together they form a unique fingerprint.

Cite this