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Relevant bibliographies by topics / Q-Absorbance Ratio method

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Journal articles

Academic literature on the topic 'Q-Absorbance Ratio method'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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Journal articles on the topic "Q-Absorbance Ratio method"

1

Kamal, Shah, and Mishra Pradeep. "Simultaneous estimation of metoprolol tartrate and amlodipine besylate by absorbance ratio method." Journal of Indian Chemical Society Vol. 96, Jun 2019 (2019): 711–15. https://doi.org/10.5281/zenodo.5647923.

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Institute of Pharmaceutical Research, GLA University, 17 Km Stone, NH-2, Mathura-Delhi Road, P.O. Chaumuhan, Mathura-281 406, Uttar Pradesh, India <em>E-mail</em>: kamal0603@gmail.com, pmishra51@rediffmail.com <em>Manuscript received online 30 January 2019, revised 25 April 2019, accepted 07 May 2019</em> A simple and cost-effective spectrophotometric method is developed for the determination of metoprolol tartrate and amlodipine besylate in bulk drug and tablets. In the present case the method developed based on absorbance ratio method (Q method). Absorbance ratio method uses the ratio of abs

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2

Atole, Dipali M., and Hrishikesh H. Rajput. "ULTRAVIOLET SPECTROSCOPY AND ITS PHARMACEUTICAL APPLICATIONS- A BRIEF REVIEW." Asian Journal of Pharmaceutical and Clinical Research 11, no. 2 (2018): 59. http://dx.doi.org/10.22159/ajpcr.2018.v11i2.21361.

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Rapid and easy analytical methods are needed due to increasing number of multicomponent formulations, biotherapeutic products and samples of complex matrix in que. Number of Ultraviolet (UV) spectrophotometric methods used for these purpose. Different types of UV spectrometric methods developed on the basis of principle of additivity, absorbance difference, processing absorption spectra. The aim of this review is to present information on simultaneous equation method, difference spectrophotometry, derivative spectrophotometry, absorbance ratio spectra, derivative ratio spectra, successive rati

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3

Kuntala, Sri Vidya, Priyanka Amula, Priyanka Adepu, Varshini Boini, and A. Ravi kiran. "Simultaneous Estimation of Luliconozole and Methyl Paraben in Pharmaceutical Formulation by UV Spectroscopy using Absorption Ratio Method." YMER Digital 21, no. 07 (2022): 69–83. http://dx.doi.org/10.37896/ymer21.07/05.

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For the simultaneous quantification of luliconazole (LUZU) and methyl paraben (MP) in formulation, a straightforward, precise UV spectrophotometric approach was developed and validated. The method was developed using absorbance ratio method. For luliconazole and methyl paraben, the absorbance was measured at 297 nm and 274 nm, respectively. The method was discovered to be linear, sensitive, exact and accurate. ICH guidelines were followed in developing the procedure. Keywords: Q- absorbance ratio method, methyl paraben, luliconazole, and UV spectrophotometric method.

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Preeti, Sudhir Bobade, and Baburaoji Ganorkar Saurabh. "Establishing Pharmaceutical Brand Variability for Bisoprolol Fumarate and Hydrochlorothiazide Combinations: As an applied Q-absorbance Spectrophotometry." Pharmaceutical Methods 8, no. 1 (2017): 01–05. https://doi.org/10.5281/zenodo.14854486.

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The amalgamation of a unique spectrophotometric technique and principle concept of studying variations in pharmaceutical brands as a contrivance for simultaneous determination of the highly marketed combination of Bisoprolol fumarate and Hydrochlorothiazide  is established  hereby. The commercial purpose of marketing same drugs or drug combinations by different names creates scope for such analysis. Hence an accurate, precise and sensitive Q-Absorbance ratio UV-spectrophotometric method has been developed  and validated for the  simultaneous estimation o

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5

Sai, Krishna Guduru Praveen Kumar Dasari. "Method Development, Validation And Stability Indicating Studies Of Olmesartan Medoxomil In Bulk And Pharmaceutical Dosage Form By UV-Spectroscopy." International Journal in Pharmaceutical Sciences 2, no. 4 (2024): 611–16. https://doi.org/10.5281/zenodo.10968588.

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Development of UV spectrophotometric method for the estimation of Olmesartan medoxomil was done by Q-Absorbance ratio method and area under curve method and stability indicating studies using methanol as solvent. In the present research, we have made an attempt to develop a simple, specific, accurate, precise and reproducible method for the estimation of Olmesartan medoxomil in dosage form by UV spectrophotometric method. The method includes area under curve method (Method I) and Q- absorbance Ratio method (Method II). The wavelength is 243 nm of the drug were selected for Method I, and for Q-

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6

Naimuddin, Riyazuddin Saiyed, C. Jain Vineet, Dedania Zarana, K. Patel Harshad, and C. Patel Rajendrakumar. "Development and validation of UV spectroscopic Q-absorbance ratio method for zonisamide and aripirazole in synthetic mixture." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 266–76. https://doi.org/10.5281/zenodo.8026889.

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A simple, specific, accurate and precise Q-Absorbance ration spectrophotometric method was developed and validated for estimation of Zonisamide and Aripirazole in Synthetic Mixture. Zonisamide and Aripirazole showed and iso-absorptive point at 230.50nm in Distilled water. The second wavelength used was 240.60nm which is λmax of Aripirazole in distilled water. The concentration of the drugs was determined by using ratio of absorbance at iso-absorptive point (λ1 =240.60 nm) and at the λmax of Aripirazole (λ2 =230.50 nm). This method is linear for both drugs; in range

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7

Patil, Pooja A., Hasumati A. Raj, and Gautam B. Sonara. "Q-ABSORBANCE RATIO SPECTROPHOTOMETRIC METHOD FOR SIMULTANEOUS DETERMINATION OF ATENOLOL AND IVABRADINE HYDROCHLORIDE IN SYNTHETIC MIXTURE." Pharmaceutical and Biological Evaluations 3, no. 2 (2016): 224–30. https://doi.org/10.5281/zenodo.51066.

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Objective: It describes Simultaneous estimation of simple, accurate, precise, robust and economical Q-Absorbance ratio spectrophotometric method for Atenolol and Ivabradine HCl in synthetic mixture. Objective of the study was to deliver information related to Ivabradine HCl and Atenolol combination’s analytical method. Methods: Absorbance ratio method for the ratio of absorbance at two selected wavelengths, one which is an iso-absorbtive point and other being the λ-max of one of the two components. Atenolol and Ivabradine HCl showed an iso-absorbtive point at 286.40 nm in methanol

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8

Jhanwar, Bharat, Bhupendra Singh, Geetanjali Saini, and Surajpal Verma. "METHOD DEVELOPMENT AND VALIDATION FOR SIMULTANEOUS ESTIMATION OF LEVOSULPIRIDE AND RABEPRAZOLE SODIUM: A NEW ANALYTICAL Q-ABSORBANCE RATIO APPROACH." Asian Journal of Pharmaceutical and Clinical Research 10, no. 16 (2017): 22. http://dx.doi.org/10.22159/ajpcr.2017.v10s4.21331.

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Objective: The aim of the study was to develop a precise, accurate, and rapid ultraviolet spectrophotometric method for simultaneous estimation of levosulpiride (LEVO) and rabeprazole sodium (RBS) in the binary mixture and to validate the method as per ICH guidelines.Method: Estimation of LEVO and RBS was performed by Q-absorbance method. Analysis was performed using the ratio of absorbance at two selected wavelengths, one at iso-absorptive point and other is the absorbance maxima of any one of the components. Single scan spectrum and the overlain spectrum conclude that absorbance maxima of LE

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9

D.NAGAVALLI and R.SHANMUGAVEL. "Simultaneous Equation, Absorbance Ratio and First Order Derivative Methods for the Estimation of Atorvastatin Calcium and Fenofibrate in Solid Dosage Form." International Journal of Innovative Science and Research Technology 8, no. 2 (2023): 457–61. https://doi.org/10.5281/zenodo.7659258.

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Three simple, precise, accurate, specific and reproducible spectrophotometric methods, requiring no prior separation, have been developed for the simultaneous estimation of atrovastatin calcium (ATV) and fenofibrate (FEN) in combined dosage form. Quantitative estimation of these drugs in marketed brands of the tablet was carried out using simultaneous equation, absorbance ratio and first order derivative methods. In the simultaneous equation method ATV and FEN have absorbance maxima at 247 and 289 nm respectively in methanol. Second method employs Q absorbance analysis using 254 nm (Isobestic

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10

Ee How, Gan, and Venkata Subrahmanya Lokesh Bontha. "SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION OF DAPAGLIFLOZIN AND SAXAGLIPTIN IN FIXED DOSE COMBINATION (FDC) BY Q-ABSORBANCE RATIO METHOD." INDIAN DRUGS 57, no. 11 (2021): 63–75. http://dx.doi.org/10.53879/id.57.11.12657.

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A simple Q-absorbance ratio method have been developed for the determination of dapagliflozin (DAPA) and saxagliptin (SAXA) in fixed dose combination (FDC) using UV-Visible spectrophotometer. In this method, the UV spectra of DAPA and SAXA were overlaid to obtain wavelength at isosbestic point (λiso) of 217.6 nm and at absorption maximum (λmax) of DAPA at 224.2 nm, which are involved in the formation of Q-absorbance equation. Validation of method was done according to ICH guidelines. DAPA and SAXA obeyed Beers law in the concentration range of 2-25 µg/mL and 5-25 µg/mL, respectively. Good accu

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