Green recovery of phenolic compounds from rice byproduct (rice bran) using glycerol based on viscosity, conductivity and density

• DOI: 10.1111/ijfs.14026
• Publication Date: 2018-11-26T01:51:38Z
• Authors: Hao Huang; Zhenni Wang; Halah Aalim; Jarukitt Limwachi...; Li Li; Zhenhua Duan; Guoping Ren; Zisheng Luo
• Keywords: Syringic acid

Summary Rice bran, the industry byproduct, contains high levels of phenolic compounds. Based on glycerol, a green recovery phenolics from rice bran was proposed. Extraction temperature ( X 1 ), glycerol concentration 2 ) and liquid‐to‐solid ratio 3 were optimised by response surface methodology. Basic physical properties, that is, viscosity, conductivity, density analysed UPLC ‐Triple‐ TOF / MS method applied for identification. Results showed optimum conditions = 66.76 °C, 19.47% 32.92 mL g −1 . Under these conditions, yield in total polyphenols 708.58 ± 12.36 mg GAE /100 DW Moreover, capacity compounds significantly correlated with conductivity solution. optimal totals thirteen identified acids (4‐hydroxybenzoic acid, vanillic syringic 4‐coumaric ferulic acid salicylic acid) quantified. These results demonstrate can serve as an ideal solvent to recover bran.