Determination of Cholesterol and its Derivatives in Nanoliposomes as Drug Delivery Conveyances by HPLC–UV: A Simple, Accurate and Cost-Effective Method Development and Validation Approach

2019 ◽  
Vol 57 (5) ◽  
pp. 469-475
Author(s):  
Abolghasem Beheshti ◽  
Solmaz Ghaffari ◽  
Hadi Farahani
Keyword(s):  
Drug Delivery ◽  
Method Development ◽  
Cost Effective ◽  
Cost Effective Method ◽  
Method Development And Validation ◽  
Development And Validation

scholarly journals RP-HPLC method development and validation for simultaneous estimation of ramipril and felodipine

2019 ◽  
Vol 10 (2) ◽  
pp. 113-117
Author(s):  
Elham Anwar Taha ◽  
Manal Mohammed Fouad ◽  
Ali Kamal Attia ◽  
Zainab Mahmoud Yousef
Keyword(s):  
High Performance ◽  
Method Development ◽  
Cost Effective ◽  
Hplc Method ◽  
Simultaneous Estimation ◽  
Short Period ◽  
Method Development And Validation ◽  
Hplc Method Development ◽  
Development And Validation

A rapid and sensitive High Performance Liquid Chromatography (HPLC) method has been developed and validated as per ICH guideline for simultaneous determination of ramipril and felodipine binary mixture. Chromatographic separation was achieved on a Hyperchom C18 column (250 × 4.6 mm i.d., 5 μm) using an isocratic mobile phase of potassium di-hydrogen phosphate (pH = 3.4): methanol: acetonitrile in the ratio 15:15:70 (v:v:v). The flow rate was 1.5 mL/min, temperature of the column was maintained at 30 °C and detection was made at 210 nm. Linearity studies indicated that the drugs obey Beer’s law over the range of 10-80 μg/mL for ramipril and 5-80 μg/mL for felodipine. The proposed method is precise, accurate, linear and robust. The short retention time allows the analysis of a large number of samples in a short period of time and, therefore, considered to be cost-effective that can be used for routine analysis of both drugs in the pharmaceutical industry.

Bioanalytical Method Development and Validation for the Determination of Vasopressin Receptor Antagonist Conivaptan in Mouse Plasma at NanoLevel and its Pharmacokinetic Application

2019 ◽  
Vol 15 (5) ◽  
pp. 591-598 ◽  
Author(s):  
Haitham Alrabiah ◽  
Ahmed Bakheit ◽  
Sabray Attia ◽  
Gamal A.E. Mostafa
Keyword(s):  
Method Development ◽  
Internal Standard ◽  
Vasopressin Receptor ◽  
Mouse Plasma ◽  
Precipitation Procedure ◽  
Validation Parameters ◽  
The Us ◽  
Method Development And Validation ◽  
Development And Validation

Background: Conivaptan inhibits two of vasopressin receptor (vasopressin receptor V1a and V2). Conivaptan is used for the treatment of hyponatremia, and in some instances, for the treatment of the heart failure. Methods: The present study aimed to develop a simple, sensitive, and accurate HPLC with ultraviolet detection for the assay of conivaptan (CON) in mouse plasma using bisoprolol as internal standard (IS). A precipitation procedure was used to extract CON and the IS from the mouse plasma. CON was chromatographically separated using a C18 analytical column at 25°C. The separation was carried out using a mixture of phosphate buffer (50 mM): acetonitrile (60: 40, v/v, pH 4.5) with a flow rate of 1.0 mL/min and detection was performed at 240 nm. Results: The assay was validated according to the US Food and Drug (FDA) guidelines. The method demonstrated linearity over a concentration range of 150 - 2000 ng/mL (correlation coefficient: r 2 = 0.9985). The mean recovery of CON from the mouse plasma was 101.13%. All validation parameters for CON were within the acceptable range. Conclusion: The investigated method has been shown to be suitable for estimating the CON in plasma samples, and this method is sensitive and highly selective, allowing the estimation of its concentrations up to the nano-scale. The suggested method was successfully used in a pharmacokinetic study of CON in mouse plasma.

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