Application of first-derivative, ratio derivative spectrophotometry, TLC-densitometry and spectrofluorimetry for the simultaneous determination of telmisartan and hydrochlorothiazide in pharmaceutical dosage forms and plasma

S. Budavari, Merck, 13 ed., Whitehouse Station, NJ, USA, 2001, pp. 1628, 854. 2002, 979 2001, 2144 2003, 911 Erk, 1996, Simultaneous determination of cilazapril and hydrochlorothiazide in tablets by spectrophotometric methods, Anal. Lett., 29, 1963, 10.1080/00032719608000802 Martin, 1995, Simultaneous spectrophotometric determination of hydrochlorothiazide and amiloride in pharmaceutical preparation, Anal. Lett., 28, 1449, 10.1080/00032719508006406 Erk, 1999, Determination of active ingredients in the pharmaceutical formulations containing hydrochlorothiazide and its binary mixtures with benazepril hydrochloride, triamterene and cilazapril by ratio spectra derivative spectrophtometry and vierordt's method, J. Pharm. Anal., 20, 155, 10.1016/S0731-7085(99)00009-6 Panderi, 1999, Simultaneous determination of benazepril hydrochloride and hydrochlorothiazide in tablets by second order derivative spectrophtometry, J. Pharm. Biomed. Anal., 21, 257, 10.1016/S0731-7085(99)00134-X Erk, 1997, Simultaneous determination of benazepril hydrochloride and hydrochlorothiazide in tablets by spectrophotometric methods, Analusis, 25, 161 Liang, 1994, Quantitative determination of hydrochlorothiazide by first-derivative differential pulse polarography, Chin. J., 13, 57 Ouyang, 1999, Chemiluminescence-based liquid chromatographic determination of hydrochlorothiazide and captopril, Anal. Chim. Acta., 386, 257, 10.1016/S0003-2670(99)00020-3 Shetkar, 1997, Simultaneous determination of enalapril maleate and hydrochlorothiazide in tablets by reversed phase high performance liquid chromatography, Anal. Lett., 30, 1143, 10.1080/00032719708004044 Farthing, 1998, Simple method for determination of hydrochlorothiazide in human urine by high performance liquid chromatography utilizing narrow-bore chromatography, J. Pharm. Biomed. Anal., 17, 1455, 10.1016/S0731-7085(98)00021-1 Papadoyannins, 1998, High-pressure liquid-chromatography determination of hydrochlorothiazide in pharmaceutical preparations and human serum after solid-phase extraction, J. Liq. Chromatogr. Relat. Technol., 21, 1671, 10.1080/10826079808001251 Gindy, 2001, Application of LC and HPTLC-densitometry for the simultaneous determination of benazepril hydrochloride and hydrochlorothiazide, J. Pharm. Biomed. Anal., 25, 171, 10.1016/S0731-7085(00)00480-5 Belal, 2001, A stability-indicating LC method for the simultaneous determination of ramipril and hydrochlorothiazide in dosage forms, J. Pharm. Biomed. Anal., 24, 335, 10.1016/S0731-7085(00)00474-X Erk, 2001, Analysis of binary mixtures of losartan potassium and hydrochlorothiazide by using HPLC, ratio derivative spectrophotometric and compensation technique, J. Pharm. Biomed. Anal., 24, 603, 10.1016/S0731-7085(00)00434-9 Xu, 2004, Rapid determination of telmisartan in pharmaceutical preparations and serum by linear sweep polarography, J. Pharm. Biomed. Anal., 34, 681, 10.1016/S0731-7085(03)00550-8 Torrealday, 2003, Experimental design approach for the optimization of a HPLC-fluorimetric method for the quantitation of the angiotensin II receptor antagonist telmisartan in urine, J. Pharm. Biomed. Anal., 32, 847, 10.1016/S0731-7085(03)00187-0 Hillaert, 2003, Optimization and validation of a micellar electrokinetic chromatographic method for the analysis of several angiotensin-II- receptor antagonists, J. Chromatogr., 984, 135, 10.1016/S0021-9673(02)01832-0 Hillaert, 2002, Optimization and validation of a capillary zone electrophoretic method for the analysis of several angiotensin-II-receptor antagonists, J. Chromatogr., 979, 323, 10.1016/S0021-9673(02)01247-5 Cagigal, 2001, pKa determination of angiotensin II receptor antagonists by spectrofluorimetry, J. Pharm. Biomed. Anal., 26, 477, 10.1016/S0731-7085(01)00413-7 Lan, 2003, Determination of telmisartan tablets by UV spectrophotometry, Chin. J., 18, 61 Hillaert, 2003, Simultaneous determination of hydrochlorothiazide and several angiotensin-II-receptor antagonists by capillary electrophoresis, J. Pharm. Biomed. Anal., 31, 329, 10.1016/S0731-7085(02)00643-X Chan-Loi, 2000, Multiple-dose pharmacokinetics of telmisartan and of hydrochlorothiazide following concurrent administration in healthy subjects, J. Clin. Pharmacol., 1323 Salinas, 1990, New spectrophotometric method for quantitative multi-component analysis resolution of mixtures of salicylic salicyluric acids, [o-hydroxylippuric acid], Talanta, 37, 347, 10.1016/0039-9140(90)80065-N Berzas Nevado, 1994, Simultaneous determination of quinoline yellow and sunset yellow by derivative spectophotometry and ratio spectroderivative, Anal. Lett., 27, 1009, 10.1080/00032719408007369 Garcia, 1995, A contribution to the derivative ratio spectrum method, Anal. Chem. Acta, 317, 83, 10.1016/0003-2670(95)00426-2 Renger, 1991, 291 Stangier, 2000, J. Clin. Pharmacol., 1312