Nabilla A, Daulay AS. Determination of secondary metabolite content of phenolic group from liquid smoke of coconut shell and husk (Cocos nucifera L.) using visible spectrophotometry. midwifery [Internet]. 2024 Dec. 30 [cited 2026 May 7];12(5):1817-2. Available from: https://midwifery.iocspublisher.org/index.php/midwifery/article/view/1793