title: Adsorbed resin phase spectrophotometric determination of vanillin or/and its derivatives.
abstract: The reactive mechanism, stability and interrelating properties, and thermodynamic constants of beta-cyclodextrin polymer (beta-CDP) including vanillin, 4-hydroxybenzaldehyde and piperonal were investigated. The effects of pH, temperature, time and solvent concentration on the inclusion reaction were determined. The optimum conditions were determined (pH, 3.0; temperature, normal atmospheric temperature; time, 90 min; ethanol concentration, <1%). The method was applied for the direct ultraviolet solid phase spectrophotometric determination of vanillin in peanut toffee and toffee, and the other aromatic aldehydes using beta-CDP adsorbed resin with satisfactory results. The beta-CDP resin has less background absorbance in ultraviolet region compared to other ion-exchanger resins.
authors.affiliation: Department of Food science and Engineering, Tianjin University of Commerce, Tianjin 300400, People's Republic of China.
authors.forename: R
authors.initials: R
authors.lastname: Li
authors.forename: Z
authors.initials: Z
authors.lastname: Jiang
authors.forename: L
authors.initials: L
authors.lastname: Mao
authors.forename: H
authors.initials: H
authors.lastname: Shen