- P-ISSN 1225-0163
- E-ISSN 2288-8985
A method on the determination of caffeine in beverage with acridiene orange-β-cyclodextrin (CD)inclusion complex was developed. The conditions such as pH of the sample solution and concentration of acridine orange and β-CD were optimized to 12.0(±0.5), 1.9 × 10−6 M and 1.25 × 10−3 M, respectively. Under these optimum conditions, the calibration curve of caffeine was obtained over concentration range of 5 × 10−5~ 1.1 × 10−3 M. The detection limit was 1.0 × 10−5 M. The relative errors(%) in beverage samples were less than 5.0%.
M. A. Rostagno, N. Manchn, M. D’Arrigo, E. Guillamn, A. Villares and A. Garca-Lafuente, Anal. Chim. Acta, 685, 204-211 (2011).
U. L. P. Okonny, S. X. Wang, R. J, Stubbs and N. A. Guzman, Electrophoresis, 26, 2652-2663 (2005).
L. vorc, P. Tomk, J. Svtkov, M. Rievaj and D. Bustin, Food Chem., 135, 1198-1204 (2012).
N. M. Najafi, A. S. Haid and R. K. Afshin, Microchem. J., 75, 151-158 (2003).
Q. Chen, S. Mou, X. Hou and Z. Ni, Anal. Chim. Acta, 371, 287-296 (1998).
M. S. El-Shahaw I, A. Hamza, S. O. Bahaffi, A. A. Al- Sibaai and T. N. Abduljabbar, Food Chem., 134, 2268- 2275 (2012).
A. A. Rahim, B. Saad, H. Osman, N. Hashim and S. Yahya, Food Chem., 126, 1412-1416 (2011).
X. Zhu, J. Sun and J. Wu, Talanta, 72, 237-242 (2007).
D. A. Skoog, D. M. West, F. J. Holler and S. R. Crouch, “Fundamentals of Analytical Chemistry”, 8th ed., 158, Thomson Brooks/Cole, U.S.A. 2004.