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The quality of palm oil is crucial to be investigated, and one of the quality indices is free fatty acid (FFA) content. Therefore, in this study, an electrochemical approach for the determination of FFA has been explored as an alternative to replace the conventional method (titration method). The electrochemical method was developed based on electrochemically reduced graphene oxide (rGO) coupled with gold nanoparticles (AuNPs) deposited onto a screen\u2010printed carbon electrode (SPCE) via drop\u2010casting technique. The voltammetric behaviour of 2\u2010methyl\u20101,4\u2010naphthoquinone (VK<jats:sub>3<\/jats:sub>) in the presence of palmitic acid at the modified electrode was investigated in an acetonitrile\/water mixture containing lithium perchlorate (LiClO<jats:sub>4<\/jats:sub>). The electrochemical detection of palmitic acid was based on the voltammetric reduction of VK<jats:sub>3<\/jats:sub> to form the corresponding hydroquinone which is proportional to the concentration of palmitic acid. Under optimum conditions, the developed method showed a good linear relationship towards palmitic acid in the concentration ranging from 0.192\u2009mM to 0.833\u2009mM with the detection limit of 0.015\u2009mM. The exploration of the developed system is expected to achieve high sensitivity and excellent selectivity towards the determination of FFA content in palm oil.<\/jats:p>","DOI":"10.1155\/2021\/6684770","type":"journal-article","created":{"date-parts":[[2021,4,14]],"date-time":"2021-04-14T21:24:03Z","timestamp":1618435443000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Reduced Graphene Oxide\/Gold Nanoparticles Modified Screen\u2010Printed Electrode for the Determination of Palmitic Acid"],"prefix":"10.1155","volume":"2021","author":[{"given":"Chin Boon","family":"Ching","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9686-4804","authenticated-orcid":false,"given":"Jaafar","family":"Abdullah","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nor Azah","family":"Yusof","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,4,14]]},"reference":[{"key":"e_1_2_8_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.foodchem.2008.07.052"},{"key":"e_1_2_8_2_2","unstructured":"DinA. 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