[4] [4] Clark Andrew C. Eur. Food Res. Technol., 2008, 226: 925.

[5] [5] Vlase T, Vlase Gabriela, Modra Dorina, et al. Journal of Thermal

          Analysis and Calorimetry, 2007, 88(2): 389.

[6] [6] Yoshioka N, Ichihashi K. Talanta, 2008, 74(5): 1408.

[7] [7] Josefa. Journal of Chromatography A, 2005, 1078: 83.

          Gand′la-Herrero Fernando, Garc′la-Carmona Francisco, Escribano

[8] [8] Panagiotis Arapitsas, Sjoberg Per J R, Turner Charlotta. Food

          Chemistry, 2108, 109: 219.

[9] [9] Rauf M A, Akhter Z, Kanwal S. Dyes and Pigments, 2005, 67(1): 77.

[15] [15] Celikoglu Hilmi Berk, Cigizoglu Hikmet Kerem. Mathematical and

          Computer Modelling, 2007, 45(3-4): 480.

[16] [16] 2007, 31(7): 1271.

          Zhong Qiu Zhao, De Shuang Huang. Applied Mathematical Modelling,