Study of Aromatic Compounds Derived from Sugarcane Bagasse. Part I: Effect of pH

TY - JOUR

T1 - Study of Aromatic Compounds Derived from Sugarcane Bagasse. Part I: Effect of pH

AU - Al Arni, Saleh

AU - Drake, Alex F.

AU - Del Borghi, Marco

AU - Converti, Attilio

PY - 2010/6

Y1 - 2010/6

N2 - This work aims at increasing the knowledge about the recovery of aromatic compounds from the lignin fraction of sugarcane bagasse, as well as exploring the possibility to recover these fine chemicals of great concern for many industrial sectors. The major natural products contained in the lignin fraction of such a straw material were extracted in previous work by alkaline hydrolysis using different concentrations of NaOH and amounts of bagasse, and HPLC analyses revealed that the extracts mainly contained p-coumaric acid, ferulic acid, syringic acid, and vanillin, the first three containing and the last lacking a carboxyl group. All these aromatic compounds have well-known antioxidant power and are very important in pharmacology. For these reasons, they have been investigated in this study by UV spectrophotometry, with special concern to the pH effect on their spectra and determination of their pK(a) values.

AB - This work aims at increasing the knowledge about the recovery of aromatic compounds from the lignin fraction of sugarcane bagasse, as well as exploring the possibility to recover these fine chemicals of great concern for many industrial sectors. The major natural products contained in the lignin fraction of such a straw material were extracted in previous work by alkaline hydrolysis using different concentrations of NaOH and amounts of bagasse, and HPLC analyses revealed that the extracts mainly contained p-coumaric acid, ferulic acid, syringic acid, and vanillin, the first three containing and the last lacking a carboxyl group. All these aromatic compounds have well-known antioxidant power and are very important in pharmacology. For these reasons, they have been investigated in this study by UV spectrophotometry, with special concern to the pH effect on their spectra and determination of their pK(a) values.

U2 - 10.1002/ceat.200900557

DO - 10.1002/ceat.200900557

M3 - Article

VL - 33

SP - 895

EP - 901

JO - CHEMICAL ENGINEERING AND TECHNOLOGY

JF - CHEMICAL ENGINEERING AND TECHNOLOGY

IS - 6

ER -