A sensitive and new solid-phase spectrophotometry for the determination of tartrazine in soft drinks has been developed. In this method, β-cyclodextrin epichlorohydrin polymer (β-CDP) of 60-80 mesh, which has less background absorbance in ultraviolet and visible region compared to other ion-exchanger resins, was used to support direct adsorption of tartrazine from aqueous solutions to form a solid complex (tartrazine-β-CDP complex). The effects of pH, temperature, time and ionic strength on the β-CDP including tartrazine were determined. The optimum conditions were obtained (pH, 1.0; temperature, 20°C; time, 40 min). The method was applied for the direct solid phase spectrophotometric determination of tartrazine in soft drink samples at the maximum absorption wavelength of 435 nm with satisfactory results.
Li, R.; Jiang, Z.-T.; and Liu, Y.-H.
"Direct solid-phase spectrophotometric determination of tartrazine in soft drinks using β-cyclodextrin polymer as support,"
Journal of Food and Drug Analysis: Vol. 16
, Article 6.
Available at: https://doi.org/10.38212/2224-6614.2327