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Fomina PS, Proskurnin MA, Mizaikoff B, Volkov DS. Infrared Spectroscopy in Aqueous Solutions: Capabilities and Challenges. Crit Rev Anal Chem 2022; 53:1748-1765. [PMID: 35212600 DOI: 10.1080/10408347.2022.2041390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Fourier-transform infrared (FTIR) spectroscopy provides rapid, reliable, quantitative, and qualitative analysis of samples in different aggregation states, i.e., gases, thin films, solids, liquids, etc. However, when analyzing aqueous solutions, particular issues associated with the rather pronounced IR absorption characteristics of water appear to interfere with the solute determination. In this review, Fourier-transform infrared spectroscopic techniques and their analytical capabilities for analyzing aqueous solutions are reviewed, and highlight examples are discussed.
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Affiliation(s)
- Polina S Fomina
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | | | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
- Hahn-Schickard, Institute for Microanalysis Systems, Ulm, Germany
| | - Dmitry S Volkov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
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Gao Y, Almalki WH, Afzal O, Panda SK, Kazmi I, Alrobaian M, Katouah HA, Altamimi ASA, Al-Abbasi FA, Alshehri S, Soni K, Ibrahim IAA, Rahman M, Beg S. Systematic development of lectin conjugated microspheres for nose-to-brain delivery of rivastigmine for the treatment of Alzheimer's disease. Biomed Pharmacother 2021; 141:111829. [PMID: 34147904 DOI: 10.1016/j.biopha.2021.111829] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 06/07/2021] [Accepted: 06/11/2021] [Indexed: 12/24/2022] Open
Abstract
The current study focuses on development of nasal mucoadhesive microspheres for nose-to-brain delivery of rivastigmine for Alzheimer treatment. A systematic development was employed for optimization of the formulation and process parameters influential on the quality attributes of the microspheres. The risk assessment study revealed major influence of the polymer concentration (ethylcellulose: chitosan), the concentration of surfactant solution (polyvinyl alcohol), and stirring speed as the critical factors for optimization of the microspheres. These factors were systematically optimized using Box-Behnken design and microspheres were evaluated for the particle size, entrapment efficiency, and in vitro drug release as the response variables. The optimized microspheres containing 4.4% wt/vol polymers, 1% wt/vol surfactant, and stirring speed at 1500 rpm showed particle size of 19.9 µm, entrapment efficiency of 77.8%, and drug release parameters as T80% of 7.3 h. The surface modification of microspheres was performed with lectin by carbodiimide activation reaction and confirmed by difference in surface charge before and after chemical functionalization by zeta potential measurement which was found to be - 25.7 mV and 20.5 mV, respectively. Ex vivo study for bioadhesion strength evaluation on goat nasal mucosa indicated a significant difference (p < 0.001) between the plain (29%) and lectin functionalized microspheres (64%). In vivo behavioral and biochemical studies in the rats treated with lectin functionalized microspheres showed markedly better memory-retention vis-à-vis test and pure drug solution treated rats (p < 0.001). In a nutshell, the present studies showed successful development of nasal microspheres for enhanced brain delivery of rivastigmine for Alzheimer's treatment.
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Affiliation(s)
- Yang Gao
- Department of Neurology, Huaihe Hospital of Henan University, Kaifeng, Henan 475000, China
| | - Waleed H Almalki
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Obaid Afzal
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, AlKharj, Saudi Arabia
| | | | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Majed Alrobaian
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, Taif, Saudi Arabia
| | - Hanadi A Katouah
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | | | - Fahad A Al-Abbasi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Kriti Soni
- Formulation Development, Dabur Research Foundation, 22 Site IV Sahibabad Industrial Area, Ghaziabad, Uttar Pradesh, India
| | - Ibrahim Abdel Aziz Ibrahim
- Department of Pharmacology and Toxicology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Mahfoozur Rahman
- Department of Pharmaceutical Sciences, Shalom Institute of Health & Allied Sciences, Sam Higginbottom University of Agriculture, Technology & Sciences, Allahabad, India
| | - Sarwar Beg
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India.
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Kaur R, Saini S, Patel A, Sharma T, Kaur R, Katare OP, Singh B. Developing a Validated HPLC Method for Quantification of Ceftazidime Employing Analytical Quality by Design and Monte Carlo Simulations. J AOAC Int 2021; 104:620-632. [PMID: 33528003 DOI: 10.1093/jaoacint/qsab014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/18/2020] [Accepted: 01/10/2021] [Indexed: 11/14/2022]
Abstract
BACKGROUND Ceftazidime, a third-generation cephalosporin, is widely used in the treatment of lung infections, often given as "off-label" nebulization. There is a need to develop a sensitive and robust analytical method to compute aerodynamic properties of ceftazidime following nebulization. OBJECTIVE The current study entails development of a simple, accurate, and sensitive HPLC method for ceftazidime estimation, employing the principles of analytical quality-by-design (AQbD) and Monte Carlo simulations. METHOD Selection of critical material attributes (CMAs) affecting method performance was accomplished by factor screening exercises. Subsequently, the influential CMAs, i.e., mobile phase ratio and flow rate, were systemically optimized using a face-centered cubic design for the chosen critical analytical attributes (CAAs). The factor relationship(s) between CMAs and CAAs was explored employing a 3 D-response surface and 2 D-contour plots, followed by numerical as well as graphical optimization, for establishing the optimal chromatographic conditions. The obtained method operable design region was validated by Monte Carlo simulations for defect rate analysis. RESULTS The optimized HPLC conditions for estimating ceftazidime were acetonitrile to acetic acid solution (75:25) as mobile phase at a flow rate of 0.7 mL/min, leading to Rt of 4.5 min and peak tailing ≤2. Validation studies, as per International Conference on Harmonization Q2(R1) guidance, demonstrated high sensitivity, accuracy, and efficiency of the developed analytical method with an LOD of 0.075 and LOQ of 0.227 µg/mL. Application of this chromatographic method was extrapolated for determining aerodynamic performance by nebulizing ceftazidime at a flow rate of 15 L/min using a next-generation impactor. The study indicated superior performance, sensitivity, and specificity of the developed analytical system for quantifying ceftazidime. CONCLUSIONS Application of an AQbD approach, coupled with Monte Carlo simulations, aided in developing a robust HPLC method for estimationof ceftazidime per se and on various stages of impactor. HIGHLIGHTS (i) QbD-enabled development of robust RP-HPLC method for ceftazidime quantification, (ii) Analytical method optimization employing Risk Assessment and Design of Experiments, (iii) Design space verification and defect rate analysis using Monte Carlo simulations, (iv) Chromatographic method validation as per ICH Q2 R1 guidelines and (v) Quantitative estimation of ceftazidime on various stages of impactor.
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Affiliation(s)
- Ranjot Kaur
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India
| | - Sumant Saini
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India
| | - Asha Patel
- Parul University, Parul Institute of Pharmacy, Vadodara, Gujarat, 391760, India
| | - Teenu Sharma
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India
| | - Ripandeep Kaur
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India
| | - O P Katare
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India
| | - Bhupinder Singh
- Panjab University, UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Chandigarh, 160 014, India.,Panjab University, UGC Centre of Excellence in Applications of Nanomaterials, Nanoparticles, and Nanocomposites (Biomedical Sciences), Chandigarh, 160 014, India
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Bandopadhyay S, Beg S, Katare OP, Sharma T, Singh B. Integrated Analytical Quality by Design (AQbD) Approach for the Development and Validation of Bioanalytical Liquid Chromatography Method for Estimation of Valsartan. J Chromatogr Sci 2020; 58:606-621. [DOI: 10.1093/chromsci/bmaa024] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 05/15/2019] [Indexed: 11/12/2022]
Abstract
Abstract
The present studies describe the systematic development and validation of a simple, rapid, sensitive and cost-effective reversed-phase high-performance liquid chromatographic bioanalytical method for the estimation of valsartan in rat plasma employing analytical quality by design (AQbD) principles quality risk management was applied for identifying the critical method parameters (CMPs) and subsequently method optimization was performed employing Box–Behnken design by selecting mobile phase pH, flow rate and % organic modifier as the CMPs and evaluated for critical analytical attributes (CAAs) such as peak area, retention time, peak tailing and number of theoretical plates. The developed method was then transferred to bioanalysis, where liquid–liquid extraction process was used for separating the drug from rat plasma. The optimization of extraction process was performed with the help of face-centered cubic design by selecting centrifugation speed and centrifugation time as the CMPs for maximizing % recovery, signal-to-noise ratio and purity threshold of the drug peak after extraction as the CAAs. Optimum chromatographic solution was chosen by mathematical and graphical search techniques, and design space was demarcated. Validation studies performed for the developed method indicated linearity ranging between 5 and 100 ng.mL−1, whereas accuracy and precision study showed good percent recovery (99–102%) along with % relative standard deviation within ±2%. Sensitivity evaluation revealed limit of detection and limit of quantification were found to be 0.76 ng.mL−1 and 2.29 ng.mL−1, respectively. In a nutshell, the present work demonstrates significant merits of AQbD approach for holistic process understanding and analytical method development and validation with enhanced robustness and performance.
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Affiliation(s)
- Shantanu Bandopadhyay
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Sector 14, Chandigarh 160014, India
| | - Sarwar Beg
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard (Hamdard University), Hamdard Nagar, New Delhi 110062, India
| | - O P Katare
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Sector 14, Chandigarh 160014, India
| | - Teenu Sharma
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Sector 14, Chandigarh 160014, India
| | - Bhupinder Singh
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Sector 14, Chandigarh 160014, India
- UGC Centre of Excellence in Nano Applications (Biomedical Sciences), Panjab University, Sector 14, Chandigarh 160014, India
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Jain A, Sharma T, Sharma G, Khurana RK, Katare OP, Singh B. QbD-Driven Analytical Method Development and Validation for Raloxifene Hydrochloride in Pure Drug and Solid Oral Dosage Form. ACTA ACUST UNITED AC 2019. [DOI: 10.1080/22297928.2019.1624193] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Atul Jain
- UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles & Nanocomposites (Biomedical Sciences), Panjab University, Chandigarh, India 160014
| | - Teenu Sharma
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India 160014
| | - Gajanand Sharma
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India 160014
| | - Rajneet Kaur Khurana
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India 160014
| | - Om Prakash Katare
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India 160014
| | - Bhupinder Singh
- UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles & Nanocomposites (Biomedical Sciences), Panjab University, Chandigarh, India 160014
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India 160014
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Jain A, Beg S, Saini S, Sharma T, Katare OP, Singh B. Application of chemometric approach for QbD-Enabled development and validation of an RP-HPLC method for estimation of methotrexate. J LIQ CHROMATOGR R T 2019. [DOI: 10.1080/10826076.2019.1626742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Atul Jain
- National UGC Centre of Excellence in NanoBiomedical Applications, Panjab University, Chandigarh, India
| | - Sarwar Beg
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India
- Department of Pharmaceutics, School of Pharmaceutical Education & Research, Jamia Hamdard, New Delhi, India
| | - Sumant Saini
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India
| | - Teenu Sharma
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India
| | - O. P. Katare
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India
| | - Bhupinder Singh
- National UGC Centre of Excellence in NanoBiomedical Applications, Panjab University, Chandigarh, India
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Panjab University, Chandigarh, India
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Mohamed FA, Khashaba PY, El-Wekil MM, Shahin RY. Spectrodensitometric determination of rivastigmine after vortex assisted magnetic solid phase extraction. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sandhu PS, Beg S, Kumar R, Katare OP, Singh B. Analytical QbD-based systematic bioanalytical HPLC method development for estimation of quercetin dihydrate. J LIQ CHROMATOGR R T 2017. [DOI: 10.1080/10826076.2017.1329744] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Premjeet Singh Sandhu
- UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles and Nanocomposites, Panjab University, Chandigarh, India
- UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Sarwar Beg
- UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Rajendra Kumar
- UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles and Nanocomposites, Panjab University, Chandigarh, India
- Post-Graduate Institute of Medical Education and Research, Chandigarh, India
| | - O. P. Katare
- UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
| | - Bhupinder Singh
- UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles and Nanocomposites, Panjab University, Chandigarh, India
- UGC Centre of Advanced Studies, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India
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Sandhu PS, Beg S, Katare OP, Singh B. QbD-Driven Development and Validation of a HPLC Method for Estimation of Tamoxifen Citrate with Improved Performance. J Chromatogr Sci 2016; 54:1373-84. [DOI: 10.1093/chromsci/bmw090] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 11/14/2022]
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In vivo 3D measurement of moxifloxacin and gatifloxacin distributions in the mouse cornea using multiphoton microscopy. Sci Rep 2016; 6:25339. [PMID: 27138688 PMCID: PMC4853790 DOI: 10.1038/srep25339] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 04/13/2016] [Indexed: 11/08/2022] Open
Abstract
Moxifloxacin and gatifloxacin are fourth-generation fluoroquinolone antibiotics used in the clinic to prevent or treat ocular infections. Their pharmacokinetics in the cornea is usually measured from extracted ocular fluids or tissues, and in vivo direct measurement is difficult. In this study multiphoton microscopy (MPM), which is a 3D optical microscopic technique based on multiphoton fluorescence, was applied to the measurement of moxifloxacin and gatifloxacin distribution in the cornea. Intrinsic multiphoton fluorescence properties of moxifloxacin and gatifloxacin were characterized, and their distributions in mouse cornea in vivo were measured by 3D MPM imaging. Both moxifloxacin and gatifloxacin had similar multiphoton spectra, while moxifloxacin had stronger fluorescence than gatifloxacin. MPM imaging of mouse cornea in vivo showed (1) moxifloxacin had good penetration through the superficial corneal epithelium, while gatifloxacin had relatively poor penetration, (2) both ophthalmic solutions had high intracellular distribution. In vivo MPM results were consistent with previous studies. This study demonstrates the feasibility of MPM as a method for in vivo direct measurement of moxifloxacin and gatifloxacin in the cornea.
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Khurana RK, Rao S, Beg S, Katare OP, Singh B. Systematic Development and Validation of a Thin-Layer Densitometric Bioanalytical Method for Estimation of Mangiferin Employing Analytical Quality by Design (AQbD) Approach. J Chromatogr Sci 2016; 54:829-41. [PMID: 26912808 DOI: 10.1093/chromsci/bmw001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Indexed: 12/23/2022]
Abstract
The present work aims at the systematic development of a simple, rapid and highly sensitive densitometry-based thin-layer chromatographic method for the quantification of mangiferin in bioanalytical samples. Initially, the quality target method profile was defined and critical analytical attributes (CAAs) earmarked, namely, retardation factor (Rf), peak height, capacity factor, theoretical plates and separation number. Face-centered cubic design was selected for optimization of volume loaded and plate dimensions as the critical method parameters selected from screening studies employing D-optimal and Plackett-Burman design studies, followed by evaluating their effect on the CAAs. The mobile phase containing a mixture of ethyl acetate : acetic acid : formic acid : water in a 7 : 1 : 1 : 1 (v/v/v/v) ratio was finally selected as the optimized solvent for apt chromatographic separation of mangiferin at 262 nm withRf 0.68 ± 0.02 and all other parameters within the acceptance limits. Method validation studies revealed high linearity in the concentration range of 50-800 ng/band for mangiferin. The developed method showed high accuracy, precision, ruggedness, robustness, specificity, sensitivity, selectivity and recovery. In a nutshell, the bioanalytical method for analysis of mangiferin in plasma revealed the presence of well-resolved peaks and high recovery of mangiferin.
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Affiliation(s)
- Rajneet Kaur Khurana
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Punjab University, Chandigarh 160 014, India
| | - Satish Rao
- Division of Radiation Biology and Toxicology, School of Life Sciences, Manipal University, Manipal, Karnataka 576 104, India
| | - Sarwar Beg
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Punjab University, Chandigarh 160 014, India
| | - O P Katare
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Punjab University, Chandigarh 160 014, India
| | - Bhupinder Singh
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies, Punjab University, Chandigarh 160 014, India UGC-Centre of Excellence in Applications of Nanomaterials, Nanoparticles and Nanocomposites (Biomedical Sciences), Punjab University, Chandigarh 160 014, India
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Beg S, Chaudhary V, Sharma G, Garg B, Panda SS, Singh B. QbD-oriented development and validation of a bioanalytical method for nevirapine with enhanced liquid-liquid extraction and chromatographic separation. Biomed Chromatogr 2015; 30:818-28. [DOI: 10.1002/bmc.3613] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 08/14/2015] [Accepted: 09/07/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Sarwar Beg
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies; Panjab University; Chandigarh 160 014 India
| | - Vandna Chaudhary
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies; Panjab University; Chandigarh 160 014 India
| | - Gajanand Sharma
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies; Panjab University; Chandigarh 160 014 India
- Formulation Research and Tech Transfer; IPCA Laboratories Limited; Kadhivali (W) Mumbai 400 067 India
| | - Babita Garg
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies; Panjab University; Chandigarh 160 014 India
| | - Sagar Suman Panda
- Department of Pharmaceutical Analysis and Quality Assurance; Roland Institute of Pharmaceutical Sciences; Berhampur Odisha 760 010 India
| | - Bhupinder Singh
- University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Studies; Panjab University; Chandigarh 160 014 India
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Beg S, Sharma G, Katare O, Lohan S, Singh B. Development and Validation of a Stability-Indicating Liquid Chromatographic Method for Estimating Olmesartan Medoxomil Using Quality by Design. J Chromatogr Sci 2015; 53:1048-59. [DOI: 10.1093/chromsci/bmu165] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Indexed: 11/13/2022]
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Raju TS, Kalyanaraman L, Reddy VV, Swamy PY. DEVELOPMENT AND VALIDATION OF AN UPLC METHOD FOR THE RAPID SEPARATION OF POSITIONAL ISOMERS AND POTENTIAL IMPURITIES OF RIVASTIGMINE HYDROGEN TARTRATE IN DRUG SUBSTANCE AND DRUG PRODUCT. J LIQ CHROMATOGR R T 2012. [DOI: 10.1080/10826076.2011.613143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- T. Satyanarayana Raju
- a Dr. Reddy's Laboratories Ltd. Active Pharmaceutical Ingredients , Hyderabad , India
- b Department of Chemistry , University College of Engineering, Osmania University , Hyderabad , India
| | - L. Kalyanaraman
- a Dr. Reddy's Laboratories Ltd. Active Pharmaceutical Ingredients , Hyderabad , India
| | - V. Venkat Reddy
- a Dr. Reddy's Laboratories Ltd. Active Pharmaceutical Ingredients , Hyderabad , India
| | - P. Yadagiri Swamy
- b Department of Chemistry , University College of Engineering, Osmania University , Hyderabad , India
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Kapil R, Dhawan S, Beg S, Singh B. Buccoadhesive films for once-a-day administration of rivastigmine: systematic formulation development and pharmacokinetic evaluation. Drug Dev Ind Pharm 2012; 39:466-80. [DOI: 10.3109/03639045.2012.665926] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kapil R, Dhawan S, Singh B, Garg B, Singh B. Systematic formulation development of once-a-day gastroretentive controlled release tablets of rivastigmine using optimized polymer blends. J Drug Deliv Sci Technol 2012. [DOI: 10.1016/s1773-2247(12)50090-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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