[1] [1] The British Pharmacopoeia, Her Majesty Stationary Office, London, UK, 2007. 1142.

[2] [2] Grant S M, Clissold S P. Drugs, 1989, 37: 310.

[3] [3] Denning D W, Tucker R M, Hanson L H, et al. Am. J. Med., 1989, 86: 791.

[4] [4] Denning D W, Van Wye J, Lewiston N J, et al. Chest, 1990, 100: 813.

[5] [5] Dismukes W E, Bradsher R W, Cloud G C, et al. Am. J. Med., 1992, 93: 489.

[6] [6] Koks C H W, Sparidans R W, Lucassen G, et al. J. Chromatogr. B, 2002, 767: 103.

[7] [7] Poirier J M, Lebot M, Descamps P, et al. Ther. Drug Monit., 1994, 16: 596.

[8] [8] Gubins P O, Gurley B J, Bowman J. J. Pharm. Biomed. Anal., 1998, 16: 1005.

[9] [9] Carrier A, Parent J. J. Chromatogr. B, 2000, 752: 413.

[10] [10] Yao M, Chen L, Srinivas N R. J. Chromatogr. B, 2001, 752: 9.

[11] [11] El-Nany N, El Sherbilny D, Belal F. J. Chin. Chem. Soc., 2007, 54: 375.

[12] [12] Lotfy H M, Hegazy M A. Spectrochimica Acta A, 2012, 96: 259.

[13] [13] Spiegel M R, Stephens L J. Schaum Outline of Theory and Problems of Statistics, Schaum Outline Series, New York, 1999.