[4] Tong C L, Hu Z, Liu W P. J. Agric. Food Chem., 2005, 53(16): 6207.

[5] Xiang G H, Tong C L, Lin H Z. J. Fluoresc., 2007, 17(5): 512.

[6] Hu Z, Tong C L. Anal. Chim. Acta, 2007, 587(2): 187.

[7] Long E C, Barton J K. Acc. Chem. Res., 1990, 23(9): 271.

[8] Chaires J B, Dattagupta N, Crothers D M. Biochemistry, 1982, 21(17): 3933.

[10] Kumar C V, Asuncion E H. J. Am. Chem. Soc., 1993, 115(19): 8547.