scholarly journals Development of Hydrophilic Interaction Liquid Chromatography Method for the Analysis of Moxonidine and Its Impurities

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Slavica Filipic ◽  
Milica Elek ◽  
Marija Popović ◽  
Katarina Nikolic ◽  
Danica Agbaba
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Limit Of Detection ◽  
Hydrophilic Interaction Liquid Chromatography ◽  
Hydrophilic Interaction ◽  
Chromatography Method ◽  
Pharmaceutical Dosage Form ◽  
Ich Guidelines ◽  
Liquid Chromatography Method

Fast and simple hydrophilic interaction liquid chromatography (HILIC) method was developed and validated for the analysis of moxonidine and its four impurities (A, B, C, and D) in pharmaceutical dosage form. All experiments were performed on the Agilent Technologies 1200 high-performance liquid chromatography (HPLC) system using Zorbax RX-SIL, 250 mm × 4.6 mm, 5 μm column as stationary phase (T=25°C, F=1 mL/min, and λ=255 nm), and mixture of acetonitrile and 40 mM ammonium formate buffer (pH 2.8) 80 : 20 (v/v) as mobile phase. Under the optimal chromatographic conditions, selected by central composite design, separation and analysis of moxonidine and its four impurities are enabled within 12 minutes. Validation of the method was conducted in accordance with ICH guidelines. Based on the obtained results selectivity, linearity (r≥0.9976), accuracy (recovery: 93.66%–114.08%), precision (RSD: 0.56%–2.55%), and robustness of the method were confirmed. The obtained values of the limit of detection and quantification revealed that the method can be used for determination of impurities levels below 0.1%. Validated method was applied for determination of moxonidine and its impurities in commercially available tablet formulation. Obtained results confirmed that validated method is fast, simple, and reliable for analysis of moxonidine and its impurities in tablets.

Determination of Chloramphenicol Residual in Freshwater Fish by HPLC

2013 ◽  
Vol 781-784 ◽  
pp. 1708-1711 ◽  
Author(s):  
Yi Qing Yang ◽  
Qian Wang ◽  
Qiao Wang ◽  
Shi Jie Yan
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Freshwater Fish ◽  
Mobile Phase ◽  
High Performance ◽  
Limit Of Detection ◽  
Chromatography Method ◽  
Average Recovery ◽  
Liquid Chromatography Method

HPLC (High Performance Liquid Chromatography) method for chloramphenicol residues in freshwater fish was developed. The samples were extracted with ethyl acetate. The LC was performed on a C18 column, mobile phase consisted of methanol-water (45:55 v/v) and eluted at 0.2mL/min at 20°C, inject volume was 20μl. The linear rang for chloramphenicol residual is within 0.5-20μg/mL, the limit of detection is 0.01ng/g. The average recovery is 80.06%-92.71%, and the RSD is 1.46%-5.61%. This method is employed to analyze freshwater fishes, such as catfish, chub and carp.

scholarly journals SIMULTANEOUS ESTIMATION OF LOPERAMIDE HYDROCHLORIDE AND TINIDAZOLE IN BULK AND FORMULATIONS BY REVERSE PHASE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY

2016 ◽  
Vol 8 (9) ◽  
pp. 173
Author(s):  
Poornima K. ◽  
Channabasavaraj Kp.
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Limit Of Detection ◽  
Simultaneous Estimation ◽  
Reverse Phase ◽  
Limit Of Quantification ◽  
Chromatography Method ◽  
Ich Guidelines ◽  
Liquid Chromatography Method

<p><strong>Objective: </strong>A new, rapid, selective, precise, accurate and economical, isocratic, reverse phase high-performance liquid chromatography method has been developed for simultaneous estimation of loperamide hydrochloride and tinidazole in bulk and in tablet formulations.</p><p><strong>Methods: </strong>The separation was achieved by using Lithosphere RP C-18, (250 x 4.6 mm, 5 µm) end capped column with a mobile phase containing sodium-1-octane sulfonate buffer: methanol: acetonitrile (40:30:30%v/v/v) pH adjusted to 4.0 (using dilute orthophosphoric acid). The flow rate was 1.0 ml/m and column effluent was monitored at 224 nm. The method was validated as per international conference on chemical harmonization (ICH) guidelines.</p><p><strong>Results</strong>:<strong> </strong>Tinidazole and loperamide hydrochloride were eluted at about 3.1 and 5.4 min respectively, indicating the shorter analysis time. The proposed method was found to be accurate, precise and reproducible. The linearity was established in the concentration range of 10-50 µg/ml. Limit of detection (LOD) and Limit of quantification (LOQ) was found to be 0.001 µg/ml and 0.003 µg/ml for loperamide hydrochloride and 0.01 µg/ml and 0.03 µg/ml for tinidazole.</p><p><strong>Conclusion: </strong>This method can be used for routine analysis of formulations containing any of the above drugs or combinations without any alteration in the chromatographic conditions.</p>

scholarly journals Simultaneous Estimation of Racecadotril and Ofloxacin by Reverse Phase High Performance Liquid Chromatography Method in Pharmaceutical Dosage Forms.

2019 ◽  
Vol 9 (4-s) ◽  
pp. 165-170
Author(s):  
Komal Gupta ◽  
Deepika Sharma ◽  
Pooja Chawla
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Limit Of Detection ◽  
Dosage Forms ◽  
Simultaneous Estimation ◽  
Chromatography Method ◽  
Pharmaceutical Dosage Forms ◽  
Ich Guidelines ◽  
Liquid Chromatography Method

Background: Racecadotril and Ofloxacin (RACIGYL- O) drug combination are used for the treatment of diarrhea. The drugs have been estimated individually in formulations but no method has been developed for simultaneous estimation of these two drugs as combination. Objective: To develop and validate a high performance liquid chromatography method for the simultaneous estimation of Racecadotril and Ofloxacin in tablet dosage form. Method: A WATERS C18 column (250 x 4.6mm, 5 μm) with mobile phase consisting of acetonitrile, methanol and water 40:40:20v/v (pH adjusted to 2.7 of water with ortho phosphoric acid). The flow rate was 1.0mL/min and effluents were monitored at 210nm. Results: The retention time of RAC and OFL was 4.666 min and 2.551 min respectively. The developed method was validated according to ICH guidelines with respect to specificity, linearity, accuracy, precision, robustness, Limit of Detection (LOD) and Limit of Quantification (LOQ). Conclusion: The method show good reproducibility and recovery with %RSD less than 2. So the proposed method was found to be simple, rapid, precise and accurate and useful for the determination of RAC and OFL in bulk and pharmaceutical dosage forms.   Keywords: RP-HPLC, Racecadotril, Ofloxacin, ICH guidelines.

scholarly journals DEVELOPMENT AND VALIDATION OF A STABILITY INDICATING REVERSE PHASEHIGH PERFORMANCE LIQUID CHROMATOGRAPHY METHOD FOR SIMULTANEOUS DETERMINATION OF CLINDAMYCIN, METRONIDAZOLE, AND CLOTRIMAZOLE IN PHARMACEUTICAL COMBINED DOSAGE FORMS

2016 ◽  
Vol 10 (1) ◽  
pp. 111 ◽  
Author(s):  
Revathi Naga Lakshmi Ponnuri ◽  
Prahlad Pragallapati ◽  
Mastanamma Sk ◽  
Ravindra N ◽  
Venkata Basaveswara Rao Mandava ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
High Performance ◽  
Limit Of Detection ◽  
Degradation Products ◽  
Reverse Phase ◽  
Limit Of Quantification ◽  
Chromatography Method ◽  
Liquid Chromatography Method

ABSTRACTObjective: The objective of present work was to develop and validate a simple, fast, precise, selective, and accurate reverse phase high-performanceliquid chromatography method for the simultaneous determination of Clindamycine, Metronidazole and Clotrimazole in a pharmaceutical dosageform.Methods: The separation of these three drugs was achieved on ODS 250×4.6 mm, 5 mm C column. Mobile phase containing 0.1% ortho phosphoricacid buffer and acetonitrile in the ratio of 55:45 v/v was pumped through column at a flow rate of 1 ml/minute. Temperature was maintained at 30°Cand ultraviolet detection at 238 nm.18Results: The retention times were observed to be 2.591, 3.584, and 4.221 minutes for Clindamycine, Metronidazole, and Clotrimazole, respectively.Linearity was found to be 25-150 μg/ml Clindamycine, Metronidazole, and Clotrimazole, respectively. The method was statistically validated forlinearity, recovery, the limit of detection (LOD), limit of quantification (LOQ), accuracy, and precision. The stress testing of the drugs individually andtheir mixture are carried out under acidic, alkaline, oxidation, photostability, and thermal degradation conditions and its degradation products arewell resolved from the analyte peaks.Conclusion: This method was successfully validated for accuracy, precision, and linearity, LOD, and LOQ.Keywords: Clindamycine, Metronidazole, Clotrimazole, Reverse phase-high performance liquid chromatography, Simultaneous determination,Degradation studies.

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