Abstract: The effects of acidic -- basic properties of solutions, temperature, time and solvents on β--cyclodextrins polymer (β-CDP) including vanillin were investigated. The optimum including conditions were advanced (pH, 3. 0; temperature, normal atmospheric temperature; time 1. 5h, ethanol concentration, <1% ).The conditions had been applied to direct ultraviolet spectrophotometric determination of vanillin in foodstuffs using β-- CDP resin with satisfactory results. Rate of recovery is 92. 6 - 96. 1%.

Key words: Vanillin &beta, - Cyclodextrins polymer Resin phase spectro photometry；