RECENT DEVELOPMENT IN ULTRAVIOLET SPECTROPHOTOMETRY THROUGH THE LAST DECADE (2006–2016): A REVIEW
DOI:
https://doi.org/10.22159/ijpps.2016v8i10.13537Keywords:
Spectral Manipulation, Ratio spectra, Amplitude, Differential, Successive, AbsorptivityAbstract
Several techniques have been proposed for treatment of spectrophotometric data, with the objective of extracting the largest amount of analytical information from spectra composed of unresolved bands. The instrumental development and analytical applications of UV regions absorption spectrophotometry produced in the last 10 y (since 2006) are reviewed. The methods were classified according to the spectra data used, including zero order absorption, derivative and ratio amplitudes. The proposed methods were applied to solve different complex pharmaceutical mixtures and the obtained results were accepted when compared to other reported methods.Â
Downloads
References
Harvey D. Modern analytical chemistry. United States of America: McGraw-Hill; 2000.
Hollas JM. Modern Spectroscopy. 4th Editon. UK: Wiley; 2004. p. 452.
Andrews DL. Molecular photophysics and spectroscopy. UK: Morgan and Claypool; 2014. p. 94.
Kenkel J. Analytical chemistry for technicians. Third ed. Greencastle, Ireland.: CRC Press; 2003. p. 584.
Raghubabu K, Mohan N, Kalyanaramu B, Ramdas C, Rao MN. Development of new visible spectrophotometric determination of tiaprofenic acid in bulk and formulations. Asian J Pharm Clin Res 2013;6:77-9.
Sreeja U, Gurupadayya B, Chandan R. Novel spectrophotometric methods for the quantification of desvenlafaxine In pure and pharmaceutical dosage form. Asian J Pharm Clin Res 2015;8:267-70.
Naga Raju K, Sunitha T, Sudheer Babu I. Quantitative estimation of riluzole using solubilizing agent by UV-spectrophotometry. Int J Appl Pharm 2014;6:4-5.
Lotfy HM, Saleh SS, Hassan NY, Salem H. Novel two wavelength spectrophotometric methods for simultaneous determination of binary mixtures with severely overlapping spectra. Spectrochim Acta, Part A 2015;136:1786–96.
Bindaiya S, Bankey S, Jain D. Simultaneous determination of nitazoxanide and ofloxacin in tablet by ultraviolet spectrophotometry (dual wavelength method). Int J ChemTech Res 2010;2:11-5.
Ramadan NK, Mohamed HM, Moustafa AA. Simultaneous determination of rabeprazole sodium and domperidone. J Appl Pharm Sci 2011;1:73-80.
Prajapati J, Patel M, Prajapati R, Prajapati N. Simultaneous determination of Perindopril erbumine and Amlodipine besylate by absorption factor method. Int J Appl Biol Pharm Technol 2011;2:230-3.
Patel CV, Khandhar AP, Captain AD, Patel KT. Validated absorption factor spectrophotometric and reversed-phase high-performance liquid chromatographic methods for the determination of ramipril and olmesartan medoxomil in pharmaceutical formulations. Eurasian J Anal Chem 2007;2:160-71.
Lotfy HM, Hegazy MA, Rezk MR, Omran YR. Novel spectrophotometric methods for simultaneous determination of timolol and dorzolamide in their binary mixture. Spectrochim Acta Part A 2014;126:197-207.
Lotfy HM, Saleh SS, Hassan NY, Salem H. A comparative study of novel spectrophotometric methods based on isosbestic points; application on a pharmaceutical ternary mixture. Spectrochim Acta Part A 2014;126:112–21.
El-Ghobashy MR, Abo-Talib NF. Spectrophotometric methods for the simultaneous determination of a binary mixture of metronidazole and diloxanide furoate without prior separation. J Adv Res 2010;1:323-9.
Lotfy HM, Hassan NY, Elgizawy SM, Saleh SS. Comparative study of new spectrophotometric methods; an application on a pharmaceutical binary mixture of ciprofloxacin hydrochloride and hydrocortisone. J Chil Chem Soc 2013;58:1651-7.
Lotfy HM, Hegazy MA, Rezk MR, Omran YR. Comparative study of novel versus conventional two-wavelength spectrophotometric methods for analysis of spectrally overlapping binary mixture. Spectrochim Acta Part A 2015;148:328-37.
Samir A, Salem H, Abdelkawy M. New developed a spectrophotometric method for simultaneous determination of salmeterol xinafoate and fluticasone propionate in bulk powder and seritide diskus inhalation. Bull Fac Pharm Cairo Univ 2012;50:121-6.
Salem H, Lotfy HM, Hassan NY, El-Zeiny MB, Saleh SS. A comparative study of different aspects of manipulating ratio spectra applied for ternary mixtures: derivative spectrophotometry versus wavelet transform. Spectrochim Acta Part A 2015;135:1002-10.
Ghorpade SA, Sali MS, Kategaonkar AH, Patel DM, Choudhari VP, Kuchekar BS. Simultaneous determination of emtricitabine and tenofovir by the area under the curve and dual wavelength spectrophotometric method. J Chil Chem Soc 2010;55:115-7.
Abdelrahman MM. Simultaneous determination of cinnarizine and domperidone by the area under the curve and dual wavelength spectrophotometric methods. Spectrochim Acta Part A 2013;113:291-6.
Lotfy HM, Saleh SS, Hassan NY, Salem H. Computation of the geometric representation of novel spectrophotometric methods used for the analysis of minor components in pharmaceutical preparations. Spectrochim Acta Part A 2015;151:628-43.
Erk N. Analysis of binary mixtures of losartan potassium and hydrochlorothiazide by using high-performance liquid chromatography, ratio derivative spectrophotometric and compensation technique. J Pharm Biomed Anal 2001;24:603–61.
Lotfy HM, Saleh SS, Hassan NY, Elgizawy SM. Spectrophotometric and chromatographic methods for the determination of a binary mixture of sodium cromoglicate and xylometazoline hydrochloride. Anal Chem Indian J 2013;13:152-60.
Samir A, Lotfy HM, Salem H, Abdelkawy M. Development and validation of simultaneous spectrophotometric and TLC-spectro- densitometric methods for determination of beclomethasone dipropionate and salbutamol in combined dosage form. Spectrochim Acta Part A 2014;128:127–36.
Mohamed ME. First-derivative spectrophotometric determination of a mixture of pirbuterol hydrochloride and butorphanol tartrate. Anal Lett 1986;11:1323-39.
Hassan SM, Amer SM, Amer MM. Determination of fusidic acid and sodium fusidate in pharmaceutical dosage forms by first-derivative ultraviolet spectrophotometry. Analyst 1987;112:1459-61.
Ouanes S, Kallel M, Trabelsi H, Safta F, Bouzouita K. Zero-crossing derivative spectrophotometry for the determination of haloperidol in the presence of parabens. J Pharm Biomed Anal 1998;17:361-4.
El-Gindy A, Ashour A, Abdel-Fattah L, Shabana MM. First derivative spectrophotometric, TLC-densitometric, and HPLC determination of acebutolol HCL in the presence of its acid-induced degradation product. J Pharm Biomed Anal 2001;24:527–34.
Lotfy HM, Tawakkol SM, Fahmy NM, Shehata MA. Validated stability indicating spectrophotometric methods for the determination of lidocaine hydrochloride, calcium dobesilate, and dexamethasone acetate in their dosage forms. Anal Chem Lett 2013;3:208-25.
Yehia AM, Abd El-Rahman MK. Application of normalized spectra in resolving a challenging orphenadrine and Paracetamol binary mixture. Spectrochim Acta Part A 2015;138:21-30.
Wahbi AAM, Abdel-Razak O, Gazy AA, Mahgoub H, Moneeb MS. Spectrophotometric determination of omeprazole, lansoprazole and pantoprazole in pharmaceutical formulations. J Pharm Biomed Anal 2002;30:1133-42.
Lotfy HM, Tawakkol SM, Fahmy NM, Shehata A. A comparative study of novel spectrophotometric resolution techniques applied for pharmaceutical mixtures with partially or severely overlapped spectra. Spectrochim Acta Part A 2015;136:937–52.
Lotfy HM, Tawakkol SM, Fahmy NM, Shehata MA. Successive spectrophotometric resolution as a novel technique for the analysis of ternary mixtures of pharmaceuticals. Spectrochim Acta Part A 2014;121:313–23.
Lotfy HM, Fayez YM, Michael AM, Nessim CK. Simultaneous determination of mebeverine hydrochloride and chlordiazepoxide in their binary mixture using novel univariate spectrophotometric methods via different manipulation pathways. Spectrochim Acta Part A 2016;155:11-20.
El-Bardicy MG, Lotfy HM, El-Sayed MA, El-Tarras MF. Smart stability-indicating spectrophotometric methods for determination of binary mixtures without prior separation. J AOAC Int 2008;91:299-310.
Lotfy HM, Hagazy MA. Comparative study of novel spectrophotometric methods manipulating ratio spectra; an application on a pharmaceutical ternary mixture of omeprazole, tinidazole, and clarithromycin. Spectrochim Acta Part A 2012;96:259–70.
Lotfy HM, Hegazy M. Simultaneous determination of some cholesterol-lowering drugs in their binary mixture by novel spectrophotometric methods. Spectrochim Acta Part A 2013;113:107-14.
Lotfy HM. Determination of simvastatin and ezatimibe in combined tablet dosage forms by constant center spectrophotometric method Int J Pharm Pharm Sci 2012;4:673-9.
Saleh SS, Lotfy HM, Hassan NY, Salem H. A comparative study of progressive versus successive spectrophotometric resolution techniques applied for pharmaceutical ternary mixtures. Spectrochim Acta Part A 2014;132:239–48.
Lotfy HM, Saleh SS, Hassan NY, Elgizawy SM. Univariate versus multivariate spectrophotometric methods for simultaneous determination of complex binary mixtures with overlapped spectra: a comparative study. Anal Chem Lett 2013;3:70-84.
Saleh SS, Lotfy HM, Hassan NY, Elgizawy SM. A comparative study of validated spectrophotometric and TLC-spectro- densitometric methods for the determination of sodium cromoglicate and fluorometholone in ophthalmic solution. Saudi Pharm J 2013;21:411–21.
Campins-Falco P, Verdu-Andres J, Bosch-Reig F. H-point standard additions method for resolution of binary mixtures with simultaneous addition of both analytes. Anal Chim Acta 1995;315:267-78.
Hund E, Massart DL, Smeyers-Verbeke J. Evaluation of the H-point standard additions method (HPSAM) and the generalized H-point standard additions method (GHPSAM) for the UV-analysis of two-component mixtures. J Pharm Biomed Anal 1999;21:23–42.
Abdollahi H. Simultaneous spectrophotometric determination of chromium (VI) and iron(III) with mixed chromogenic reagents by H-point standard addition method and partial least squares regression. Anal Chim Acta 2001;442:327–36.
Yehia AM. Development and validation of new spectrophotometric ratio H-point standard addition method and application to gastrointestinal acting drugs mixtures. Spectrochim Acta Part A 2013;109:193–200.
Afkhami A, Bahram M. Mean centering of ratio spectra as a new spectrophotometric method for the analysis of binary and ternary mixtures. Talanta 2005;66:712–20.
Afkhami A, Bahram M. A novel spectrophotometric method for the simultaneous kinetic analysis of ternary mixtures by mean centering of kinetic ratio profiles. Talanta 2006;68:1148–55.
Bahram M, Madrakian T, Bozorgzadeh E, Afkhami A. Micelle-mediated extraction for the simultaneous spectrophotometric determination of aluminum and beryllium using mean centering of ratio spectra. Talanta 2007;72:408–14.
Issa MM, Nejem RM, Stefan Van Staden RI, Aboul-Enein HY. New approach application of data transformation in mean centering of ratio spectra method. Spectrochim Acta Part A 2015;142:204–9.
Hegazy MA. A novel pure component contribution algorithm (PCCA) for extracting components’ contribution from severely overlapped signals; application to UV-spectrophotometric data. Spectrochim Acta Part A 2015;151:405–14.
Afkhami A, Abbasi-Tarighat M. Application of a continuous wavelet transformation to the simultaneous kinetic determination of binary mixtures. Talanta 2009;78:424–31.
Afkhami A, Nematollahi D, Madrakian T, Abbasi-Tarighat M, Hajihadi M. Simultaneous spectrophotometric determination of binary mixtures of surfactants using continuous wavelet transformation. J Hazard Mater 2009;166:770–5.
Dinc E, Kaya S, Doganay T, Baleanu D. Continuous wavelet and derivative transforms for the simultaneous quantitative analysis and dissolution test of levodopa–benserazide tablets. J Pharm Biomed Anal 2007;44:991–5.
Patel NS, Nandurbarkar VP, Patel AJ, Patel SG. Simultaneous spectrophotometric determination of celecoxib and diacerein in bulk and capsule by absorption correction method and chemometric methods. Spectrochim Acta Part A 2014;125:46–52.
Lotfy HM, Hegazy MA, Mowaka S, Mohamed EH. Novel spectrophotometric methods for simultaneous determination of amlodipine, valsartan and hydrochlorothiazide in their ternary mixture. Spectrochim Acta Part A 2015;140:495-508.
Salem H, Mohamed D. A comparative study of smart spectrophotometric methods for simultaneous determination of a skeletal muscle relaxant and an analgesic in combined dosage form. Spectrochim Acta Part A 2015;140:166-73.
Lotfy HM, Amer SM, Zaazaa HE, Mostafa NS. A comparative study of the novel spectrophotometric methods versus conventional ones for the simultaneous determination of Esomeprazole magnesium trihydrate and Naproxen in their binary mixture. Spectrochim Acta Part A 2015;151:538-46.
Kelani KM, Shalaby AA, Elmaamly MY, Halim MK. Spectrophotometric and chemometric methods for simultaneous determination of two anti-hypertensive drugs in their combined dosage form. Pharm Anal Acta 2015;6:1-11.
Attia KAM, Nassar MWI, El-Zeiny MB, Serag A. Different spectrophotometric methods applied for the analysis of a binary mixture of flucloxacillin and amoxicillin: a comparative study. Spectrochim Acta Part A 2016;161:64-9.
Hegazy MA, Abbas SS, Zaazaa HE, Essam HM. Conventional univariate versus multivariate spectrophotometric assisted techniques for simultaneous determination of perindopril arginine and amlodipine besylate in the presence of their degradation products. Spectrochim Acta Part A 2015;150:940-8.
Lotfy HM, Salem H, Abdelkawy M, Samir A. Spectrophotometric methods for simultaneous determination of betamethasone valerate and fusidic acid in their binary mixture. Spectrochim Acta Part A 2015;140:294-304.
Lotfy HM, Hegazy MA, Mowaka S, Mohamed EH. Validated spectrophotometric methods for simultaneous determination of omeprazole, tinidazole and doxycycline in their ternary mixture. Spectrochim Acta Part A 2016;153:321-32.
Lotfy HM, Mohamed D, Mowaka S. A comparative study of smart spectrophotometric methods for simultaneous determination of sitagliptin phosphate and metformin hydrochloride in their binary mixture. Spectrochim Acta Part A 2015;149:441-51.
Darwish HW, Bakheit AH, Naguib IA. Comparative study of novel ratio spectra and isoabsorption point based spectrophotometric methods: application on a binary mixture of ascorbic acid and rutin. J Anal Methods Chem 2016;2:1-12.
Lamie NT, Yehia AM. Development of normalized spectra is manipulating spectrophotometric methods for simultaneous determination of dimenhydrinate and cinnarizine binary mixture. Spectrochim Acta Part A 2015;150:142-50.
Hegazy MA, Lotfy HM, Rezk MR, Omran YR. Novel spectrophotometric determination of chloramphenicol and dexamethasone in the presence of non-labeled interfering substances using univariate methods and multivariate regression model updating. Spectrochim Acta Part A 2015;140:600-13.
El-Sayed MA. Innovative spectrophotometric methods for determination of almitrine dis mesylate and raubasine in duxil tablets. Anal Lett 2009;42:1882-99.
Abd El Kawy M, El Gindy AE, Hegazy M, Shokry ES. A novel spectrophotometric method for simultaneous determination of two binary mixtures containing hydrochlorothiazide by ratio subtraction. J Appl Sci Res 2010;6:918-26.
Farouk M, EL-Aziz O, Hemdan A, Shehata MA. Simple novel spectrophotometric and spectrofluorimetric methods for determination of some anti-hypertensive drugs. J Am Sci 2011;7:300-12.
Lotfy HM, Monir HH, Abd El-aleem AE. Novel spectrophotometric methods for the determination of fluconazole in the presence of its oxidative degradation product. J Chil Chem Soc 2012;57:1199-207.
Hassan NY, Elgizawy SM, Lotfy HM, Saleh SS. Comparative study of spectrophotometric methods versus chemometric methods; an application on a pharmaceutical binary mixture of ofloxacin and dexamethasone. Int Res J Pure Appl Chem 2013;3:90-110.
Abdel-fattah L, Weshahy SA, Hassan NY, Mostafa NM, Boltia SA. Development and validation of spectrophotometric, chemometric and high pressure liquid chromatographic methods for the determination of cefepime hydrochloride in the presence of its acid and alkaline degradation products. Int J Anal Bioanal Chem 2013;3:86-96.
Baghdady YZ, Al-Ghobashy MA, Abdel-Aleem AE, Weshahy SA. Two new spectrophotometric approaches to the simultaneous determination of ezetimibe and atorvastatin calcium. Int J Chem-Stud 2013;1:231-45.
Hegazy AM, Hassan NY, Metwally FH, Abdel-Kawy M. Application and validation of two smart spectrophotometric and an HP-TLC densitometric methods for determination of metoclopramide hydrochloride/paracetamol in raw material and in pharmaceuticals. ‎Int J Pharm 2013;3:470-81.
Darwish HW. Application of smart spectrophotometric methods and artificial neural network for the simultaneous quantitation of olmesartan medoxamil, amlodipine besylate and hydrochlorothiazide in their combined pharmaceutical dosage form. Chem Cent J 2013;7:22-31.
Ezzeldin MI, Shokry E, Fouad MA, Elbagary RI. Application of chromatographic and spectrophotometric methods for the analysis of selected antihypertensive combination. Int J Anal Pharm Biomed Sci 2013;2:6-15.
Abdelaleem EA, Naguib IA, Zaazaa HE, Draz ME. Spectrophotometric methods for quantitative determination of a binary mixture of hydrochlorothiazide and amiloride hydrochloride without prior separation. Asian J Biomed Pharm Sci 2014;4:27-40.
Zaazaa HE, Abbas SS, Zeinab A, El-Zeany BA, EL-Haddad DA. Stability is indicating spectrophotometric methods for determination of tiemonium methyl sulphate in the presence of its degradation products. J Appl Pharm Sci 2014;4:33-49.
Lotfy HM, Amer SM, Zaazaa HE, Mostafa NS. Spectrophotometric methods for quantitative determination of a binary mixture of naproxen sodium and domperidone maleate. Austin J Anal Pharm Chem 2015;2:1044-52.
Fouad MM. Novel spectrophotometric methods for simultaneous determination of ciprofloxacin hydrochloride and dexamethasone sodium phosphate in their binary mixture. Indo Am J Pharm Res 2015;5:2470-80.
Darwish HA, Metwally FH, El-Bayoumi A. Novel ratio subtraction and isoabsorption point methods for determination of ambroxol hydrochloride and doxycycline in their combined dosage form: development and validation. Trop J Pharm Res 2015;14:133-40.
Abdel-Ghany MF, Abdel-Aziz O, Mohammed YY. Validation of four different spectrophotometric methods for simultaneous determination of domperidone and ranitidine in bulk and pharmaceutical formulation. Spectrochim Acta Part A 2015;149:30-40.
Mostafa NM, Abdel-Fattah L, Weshahy SA, Hassan NY, Boltia SA. Validated stability indicating spectrophotometric methods for the determination of cefixime trihydrate in the presence of its acid and alkali degradation products. J AOAC Int 2015;98:35-45.
Elghobashy MR, Bebawy LI, Shokry RF, Abbas SS. Successive ratio subtraction coupled with constant multiplication spectrophotometric method for determination of hydroquinone in a complex mixture with its degradation products, tretinoin, and methylparaben. Spectrochim Acta Part A 2016;157:116-23.
Mohsen AM, Lotfy HM, Badawey AM, Salem H, Elkhateeb SZ. Application of three novel spectrophotometric methods manipulating ratio spectra for resolving a pharmaceutical mixture of chlorphenoxamine hydrochloride and caffeine. Int J Pharm Pharm Sci 2013;5:478-87.
Essam HM, Abd-El-Rahman MK. Smart manipulation of ratio spectra for resolving a pharmaceutical mixture of methocarbamol and paracetamol. Spectrochim Acta Part A 2015;141:1-9.
Tawakkol SM, Farouk M, Elaziz OA, Hemdan A, Shehata MA. A comparative study between univariate spectrophotometry and multivariate calibration as analytical tools for simultaneous quantitation of moexipril and hydrochlorothiazide. Spectrochim Acta Part A 2014;133:300-6.
Ali NW, Abdelwahab NS, EL fatatry HM, Osman WM. Spectrophotometric methods for simultaneous determination of two hypouricemic drugs in their combined dosage form. Pharm Anal Acta 2013;4:255-61.
Elzanfaly ES, Saad AS, Abd-Elaleem AB. Simultaneous determination of retinoic acid and hydroquinone in skin ointment using the spectrophotometric technique (difference ratio method). Saudi Pharm J 2012;20:249–53.
Elzanfaly ES, Saad AS, Abd Elaleem AE. A smart, simple spectrophotometric method for simultaneous determination of binary mixtures. J Pharm Anal 2012;2:382–5.
Lotfy HM, Saleh SS, Hassan NY, Elgizawy SM. A comparative study of the novel ratio difference method versus conventional spectrophotometric techniques for the analysis of binary mixture with overlapped spectra. Am J Anal Chem 2012;3:761-9.
Moustafa H, Fayez Y. Spectrophotometric methods manipulating ratio spectra for simultaneous determination of binary mixtures with sever overlapping spectra: a comparative study. Spectrochim Acta Part A 2014;133:759-66.
Mohamed HM. A study of selective spectrophotometric methods for simultaneous determination of Itopride hydrochloride and rabeprazole sodium binary mixture: resolving to sever overlapping spectra. Spectrochim Acta Part A 2015;136:1308-15.
Moustafa AA, Salem H, Hegazy M, Ali O. Evaluating the efficiency of spectral resolution of univariate methods manipulating ratio spectra and comparing to multivariate methods: an application to the ternary mixture in common cold preparation. Spectrochim Acta Part A 2015;137:1363-73.
Attia KAM, Nassar MWI, El-Zeiny M, Serag A. Different approaches in manipulating ratio spectra applied for the analysis of cefprozil in the presence of its alkaline-induced degradation product: a comparative study. Spectrochim Acta Part A 2015;145:289-94.
Lamie NT. Comparative study of spectrophotometric methods manipulating ratio spectra: an application on a pharmaceutical binary mixture of cinnarizine and dimenhydrinate. Spectrochim Acta Part A 2015;141:193-201.
Abdel-Aleem EA, Hegazy MA, Sayed NW, Abdelkawy M, Abdelfatah RM. Novel spectrophotometric determination of flumethasone pivalate and clioquinol in their binary mixture and pharmaceutical formulation. Spectrochim Acta Part A 2015;136:707-13.
Fayez YM. Simultaneous determination of some anti-hypertensive drugs in their binary mixture by novel spectrophotometric methods. Spectrochim Acta Part A 2014;132:446-51.
Moustafa AA, Salem H, Hegazy M, Ali O. Stability indicating spectrophotometric and chemometric methods for determination of buflomedil in the presence of its acid-induced degradation products. Anal Chem Lett 2013;3:342-58.
Zaazaa HE, Elzanfaly ES, Soudi AT, Salem MY. Application of the ratio difference spectrophotometry to the determination of ibuprofen and famotidine in their combined dosage form; comparison with previously published spectrophotometric methods. Spectrochim Acta Part A 2015;143:251-5.
Abdel-Moety EM, Badawey AM, Essam HM, Alamine FMA. Stability-indicating methods for the determination of gatifloxacin in the presence of its acid degradation product (s). Int J Drug Dev Res 2015;7:1-8.
Lotfy HM, Hegazy MA, El-aziz MM, Fattah LEA. Stability is indicating spectrophotometric methods determination of nicardipine in the presence of its alkaline induced degradation products. Int J Pharm Pharm Sci 2016;8:62-6.
Yehia AM, Arafa RM, Abbas SS, Amer SM. Ratio manipulating spectrophotometry versus chemometry as stability indicating methods for cefquinome sulfate determination. Spectrochim Acta Part A 2016;153:231-40.
Riad SM, Abd El-Rahman MK, Fawaz EM, Shehata MA. A comparative study between three stability indicating spectrophotometric methods for the determination of diatrizoate sodium in the presence of its cytotoxic degradation product based on the two-wavelength selection. Spectrochim Acta Part A 2015;145:254-9.
Lamie NT. Selective determination of itraconazole in the presence of its oxidative degradation product by a new spectrophotometric method. Spectrosc Spectral Anal 2015;35:502-6.
Riad SM, Salem H, Elbalkiny HT, Khattab FI. Validated univariate and multivariate spectrophotometric methods for the determination of pharmaceuticals mixture in complex wastewater. Spectrochim Acta Part A 2015;140:451-61.
Abdel-Halim LM, Abd-El-Rahman MK, Ramadan NK, El Sanabary HFA, Salem MY. A comparative study between recent methods manipulating ratio spectra and classical methods based on two-wavelength selection for the determination of a binary mixture of antazoline hydrochloride and tetryzoline hydrochloride. Spectrochim Acta Part A 2016;159:98-105.
Hegazy MA, Alâ€Ghobashy MA, Eltanany BM, Khattab FI. Spectral resolution and simultaneous determination of oxymetazoline hydrochloride and sodium cromoglycate by derivative and ratioâ€based spectrophotometric methods. Eur J Chem 2015;6:319â€24.
Lamie NT. Simultaneous determination of binary mixture of amlodipine besylate and atenolol-based on dual wavelengths. Spectrochim Acta Part A 2015;149:201-7.
Fayez YM, Elghobashy MR, Goda ZM, Shehata MA. Comparative study on four spectrophotometric methods manipulating ratio spectra for the simultaneous determination of a binary mixture of diflucortolone valerate and isoconazole nitrate. Bull Fac Pharm Cairo Univ 2016;54:39-47.
Lotfy HM. Absorbance subtraction and amplitude modulation as novel spectrophotometric methods for the analysis of binary mixtures. Int J Pharm Pharm Sci 2014;6:735-41.
Dang Hoang V, Thi Loan N, Thi Tho V, Thi Nguyen HM. UV spectrophotometric simultaneous determination of cefoperazone and sulbactam in pharmaceutical formulations by derivative, Fourier and wavelet transforms. Spectrochim Acta Part A 2014;121:704–14.
Elzanfaly ES, Hassan SA, Salem MY, El-Zeany BA. Continuous wavelet transform, a powerful alternative to derivative spectrophotometry in the analysis of binary and ternary mixtures: a comparative study. Spectrochim Acta Part A 2015;151:945-55.
Ashour A, Hegazy MA, Abdel-Kawy M, ElZeiny MB. Simultaneous spectrophotometric determination of overlapping spectra of paracetamol and caffeine in laboratory prepared mixtures and pharmaceutical preparations using continuous wavelet and derivative transform. J Saudi Chem Soc 2015;19:186-92.
Published
How to Cite
Issue
Section
