Optimization of microwave-enhanced extraction parameters to recover phenolic compounds and antioxidants from Corchorus olitorius leaves

被引:9
作者
Alara, Oluwaseun Ruth [1 ,2 ]
Abdurahman, Nour Hamid [1 ,2 ]
Ali, Hassan Alsaggaf [3 ]
机构
[1] Univ Malaysia Pahang, Ctr Res Adv Fluid & Proc, Fluid Ctr, Gambang 26300, Pahang, Malaysia
[2] Univ Malaysia Pahang, Coll Engn, Dept Chem Engn, Gambang 26300, Pahang, Malaysia
[3] Eastern Unity Technol, Suite 01,12th Floor Plaza,138 Annex Hotel Maya,Jal, Kuala Lumpur 50450, Malaysia
关键词
Corchorus olitorius; Response surface methodology; Total phenols; Antioxidant; Liquid chromatography quadrupole time-of-flight mass spectrometry; Microwave-enhanced extraction; ASSISTED EXTRACTION; POLYPHENOLS; FLAVONOIDS; LEAF;
D O I
10.1007/s11696-023-02771-x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Vegetables are industrial crops endowed with both nutritional and medicinal values. The overwhelming contributions of vegetables to human living in the form of nutrients and medicine cannot be under emphasised. Thus, this study examined the recoveries of phenolic compounds and antioxidants from Corchorus olitorius leaves using a microwave-enhanced extraction technique. Furthermore, the phenolic compounds in the leaf extract of C. olitorius were comprehensively identified using liquid chromatography-mass spectrometry quadrupole of flight (LC-QToF-MS). At the optimized conditions of microwave-enhanced extraction (extraction time of 131 s, microwave power 305 W, solvent/sample ratio of 12 mL/g, and ethanol concentration of 50%), total phenolic content (TPC) of 343.098 +/- 3.05 mg GAE/10 g d.b., IC50 values of 68.89 +/- 1.08 and 29.76 +/- 1.00 mu g/mL for 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2 '-azino-bis(3-ethylbenzothiazoline-6 '-sulfonic acid) (ABTS) assays, respectively, were achieved. Furthermore, an aggregate of fourteen phenolic compounds that include 1-galloyl-glucose, 1,3,5-O-tricaffeoylquinic acid, procyanidin C-1, 4,4 ',5,6-tetrahydroxystilbene, 3,4,5-O-tricaffeoylquinic acid, 5-desgalloylstachyurin, sanguiin H-4, corilagin_1, 1-O-galloylpedunculagin, laevigatin A, pedunculagin, 2,4,6-tri-O-galloyl-beta-D-glucose, 1,3,6-trigalloyl-beta-D-glucose, and 1,2,3,6-tetra-O-galloyl-beta-D-glucose was tentatively identified in the leaf extract of C. olitorius. In general, this study has established C. olitorius leaves as sources of phenolic compounds and natural antioxidants. Thus, the intake can continue to be promoted as a way forward in solving the problem of food insecurity.
引用
收藏
页码:4217 / 4233
页数:17
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