Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide
Palm oil is one of the most produced and traded vegetable oils in the world recently. The quality of palm oil is very important to be examined and one of the quality indices is free fatty acid (FFA) content. Thus, in this study, an electrochemical technique for the determination of FFA as alternativ...
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| Format: | Article |
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Springer
2021
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| _version_ | 1796982895175270400 |
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| author | Chin, Boon Ching Abdullah, Jaafar Yusof, Nor Azah |
| author_facet | Chin, Boon Ching Abdullah, Jaafar Yusof, Nor Azah |
| author_sort | Chin, Boon Ching |
| collection | UPM |
| description | Palm oil is one of the most produced and traded vegetable oils in the world recently. The quality of palm oil is very important to be examined and one of the quality indices is free fatty acid (FFA) content. Thus, in this study, an electrochemical technique for the determination of FFA as alternative to conventional method (titration method) has been explored. The electrochemical method was developed based on electrochemically reduced graphene oxide (rGO) deposited onto screen printed carbon electrode (SPCE) via drop-casting technique. The modified electrode was characterized by physico-chemical and electrochemical methods, respectively. The voltammetric behaviour of 2-methyl-1,4-naphthaquinone (VK3) in the presence of palmitic acid at the modified electrode was investigated in an acetonitrile/water (3:1) mixture containing 2.5 M lithium perchlorate (LiClO4). The electrochemical detection of palmitic acid was based on the voltammetric reduction of VK3 to form corresponding hydroquinone which is proportional to the concentration of palmitic acid. Under optimum condition, the developed method showed a good linear relationship in the concentration ranging from 0.192 mM to 0.833 mM with the detection limit of 0.079 mM. The developed sensor illustrates high sensitivity and rapid detection towards determination of FFA content in palm oil. |
| first_indexed | 2024-03-06T10:58:34Z |
| format | Article |
| id | upm.eprints-93558 |
| institution | Universiti Putra Malaysia |
| last_indexed | 2024-03-06T10:58:34Z |
| publishDate | 2021 |
| publisher | Springer |
| record_format | dspace |
| spelling | upm.eprints-935582023-10-24T02:28:54Z http://psasir.upm.edu.my/id/eprint/93558/ Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide Chin, Boon Ching Abdullah, Jaafar Yusof, Nor Azah Palm oil is one of the most produced and traded vegetable oils in the world recently. The quality of palm oil is very important to be examined and one of the quality indices is free fatty acid (FFA) content. Thus, in this study, an electrochemical technique for the determination of FFA as alternative to conventional method (titration method) has been explored. The electrochemical method was developed based on electrochemically reduced graphene oxide (rGO) deposited onto screen printed carbon electrode (SPCE) via drop-casting technique. The modified electrode was characterized by physico-chemical and electrochemical methods, respectively. The voltammetric behaviour of 2-methyl-1,4-naphthaquinone (VK3) in the presence of palmitic acid at the modified electrode was investigated in an acetonitrile/water (3:1) mixture containing 2.5 M lithium perchlorate (LiClO4). The electrochemical detection of palmitic acid was based on the voltammetric reduction of VK3 to form corresponding hydroquinone which is proportional to the concentration of palmitic acid. Under optimum condition, the developed method showed a good linear relationship in the concentration ranging from 0.192 mM to 0.833 mM with the detection limit of 0.079 mM. The developed sensor illustrates high sensitivity and rapid detection towards determination of FFA content in palm oil. Springer 2021-04-24 Article PeerReviewed Chin, Boon Ching and Abdullah, Jaafar and Yusof, Nor Azah (2021) Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide. Journal of Food Science and Technology, 59. 01-Oct. ISSN 0022-1155; ESSN: 0975-8402 https://link.springer.com/article/10.1007/s13197-021-05109-1 10.1007/s13197-021-05109-1 |
| spellingShingle | Chin, Boon Ching Abdullah, Jaafar Yusof, Nor Azah Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title | Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title_full | Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title_fullStr | Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title_full_unstemmed | Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title_short | Voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| title_sort | voltammetric determination of palmitic acid by electrode modified with reduced graphene oxide |
| work_keys_str_mv | AT chinboonching voltammetricdeterminationofpalmiticacidbyelectrodemodifiedwithreducedgrapheneoxide AT abdullahjaafar voltammetricdeterminationofpalmiticacidbyelectrodemodifiedwithreducedgrapheneoxide AT yusofnorazah voltammetricdeterminationofpalmiticacidbyelectrodemodifiedwithreducedgrapheneoxide |