Effect of Sodium Carbonate on Extraction by Aqueous Decoction of Total Polyphenols from Crushed and Whole Leaves of Combretum micranthum  

作　　者：Papa Guedel Faye Lahat Niang Edouard Mbarick Ndiaye Oumar Ibn Khatab Cisse Alioune Sow Nicolas Cyrille Ayessou Mady Cisse Papa Guedel Faye;Lahat Niang;Edouard Mbarick Ndiaye;Oumar Ibn Khatab Cisse;Alioune Sow;Nicolas Cyrille Ayessou;Mady Cisse(Laboratory of Water Energy Environment and Industrial Processes (LE3PI), Polytechnic Higher School, Cheikh Anta Diop University of Dakar (ESP-UCAD), Dakar, Senega;Center for Studies on Food Security and Functional Molecules (CESAM), Dakar, Senegal;National School of Agriculture, Iba Der THIAM University, Thiès, Senegal;UFR Agronomic Sciences, Aquaculture and Agrifood Technologies, Gaston BERGER University, Saint Louis, USA)

机构地区：[1]Laboratory of Water Energy Environment and Industrial Processes (LE3PI), Polytechnic Higher School, Cheikh Anta Diop University of Dakar (ESP-UCAD), Dakar, Senega [2]Center for Studies on Food Security and Functional Molecules (CESAM), Dakar, Senegal [3]National School of Agriculture, Iba Der THIAM University, Thiès, Senegal [4]UFR Agronomic Sciences, Aquaculture and Agrifood Technologies, Gaston BERGER University, Saint Louis, USA

出　　处：《Food and Nutrition Sciences》2023年第9期812-823,共12页食品与营养科学（英文）

摘　　要：Sodium bicarbonate is sometimes used to aid in the extraction of total polyphenols. Its main effect is to increase the pH of the extraction solution. Raising the pH can cause changes in the chemical structure of polyphenols. This can lead to variations in their biological properties, solubility and stability. This work studied the effect of sodium carbonate on the extraction by aqueous decoction of total polyphenols from the leaves of Combretum micranthum. The content of total phenolic compounds in the extracts was estimated by the Folin-Ciocalteu method. The color of the samples was measured using a colorimeter (type: KONICA MINOLTA. Japan) based on the CIELAB color system. The results obtained were subjected to a one-way ANOVA analysis of variance with R software version 3.2.4 Revised (2018) and Minitab-18 software. The results reveal a drop in the concentration of extracted polyphenols proportional to the addition of sodium carbonate, i.e. a drop from 3.30 to 1.04 mg·AG·100 g^-1 of extract on whole leaves and 3.921 to 2.551 mg·AG·100 g^-1 extract on crushed leaves. On the other hand, the intensity of the coloring of the extracts increases significantly with the addition of sodium carbonate from 0.0 g·L ^-1 to 0.666 g·L^-1.Sodium bicarbonate is sometimes used to aid in the extraction of total polyphenols. Its main effect is to increase the pH of the extraction solution. Raising the pH can cause changes in the chemical structure of polyphenols. This can lead to variations in their biological properties, solubility and stability. This work studied the effect of sodium carbonate on the extraction by aqueous decoction of total polyphenols from the leaves of Combretum micranthum. The content of total phenolic compounds in the extracts was estimated by the Folin-Ciocalteu method. The color of the samples was measured using a colorimeter (type: KONICA MINOLTA. Japan) based on the CIELAB color system. The results obtained were subjected to a one-way ANOVA analysis of variance with R software version 3.2.4 Revised (2018) and Minitab-18 software. The results reveal a drop in the concentration of extracted polyphenols proportional to the addition of sodium carbonate, i.e. a drop from 3.30 to 1.04 mg·AG·100 g^-1 of extract on whole leaves and 3.921 to 2.551 mg·AG·100 g^-1 extract on crushed leaves. On the other hand, the intensity of the coloring of the extracts increases significantly with the addition of sodium carbonate from 0.0 g·L ^-1 to 0.666 g·L^-1.

关 键 词：Baking Soda Combrutum micranthum EXTRACTION DECOCTION Polyphenols 

分 类 号：R28[医药卫生—中药学]