The objective of this work was to develop a simple, cost effective, rugged and a high throughput method for simultaneous estimation of Azilsartan and Chlorthalidone in human plasma. Solid phase extraction technique is introduced here for first time and its advantages are: (I) Short processing time, (II) Significant reduction in the labour and (III) This technique minimizes chances of errors, saves considerable time and simplifies the sample preparation methodology. The run time per sample analysis of 15.0 min suggests the high throughput of the proposed method. From the results of all the validation parameters, the method proposed here can be useful for therapeutic drug monitoring both for analysis of routine samples of single dose or multiple dose pharmacokinetics and also for the clinical trial samples.
Table of Contents
Chapter – 1: Introduction
Section- 1: General introduction
1 Bioanalytical techniques
2 Types of chromatography
3 Sample preparation techniques
4 Method validation
5 Bioavailability and bioequivalence
6 References
Section- 2: Introduction of Active Pharmaceutical Ingredients (API) used for present work by various instrumental method development and validation
1 Introduction of Azilsartan medoxomil
2 Introduction of Chlorthalidone
3 References:
Chapter-2: Development and validation of RP-HPLC methods for quantitative determination of some bioactive molecules in human plasma
Section-1: Development and validation of HPLC method for simultaneous quantitative determination of Azilsartan medoxomil potassium and Chlorthalidone in human plasma by HPLC
1 Aim of present work
2 Experimental
3 Method development
4 Results and discussion
5 Conclusion
Research Objectives and Thematic Focus
The primary objective of this work is to develop and validate a high-throughput, sensitive, and selective HPLC method for the simultaneous quantitative determination of Azilsartan medoxomil potassium and Chlorthalidone in human plasma to support clinical and pharmacokinetic studies.
- Development of a rugged HPLC method for simultaneous quantification.
- Optimization of sample extraction techniques using Solid Phase Extraction (SPE).
- Comprehensive validation of the analytical method according to USFDA guidelines.
- Evaluation of stability and matrix effects in human plasma samples.
- Application of the method for therapeutic drug monitoring and pharmacokinetic analysis.
Excerpt from the Book
3 Method validation
The search for the reliable range of a method and continuous application of this knowledge is called validation [7]. It can also be defined as the process of documenting that the method under consideration is suitable for its intended purpose [53]. Method validation involves all the procedures required to demonstrate that a particular method for quantitative determination of an analyte(s) in a particular biological matrix is reliable for the intended application [2]. Validation is also a proof of the repeatability, specificity and suitability of the method. Bioanalytical methods must be validated if the results are used to support the registration of a new drug or a new formulation of an existing one. Validation is required to demonstrate the performance of the method and reliability of analytical results [54]. If a bioanalytical method is claimed to be for quantitative biomedical application, then it is important to ensure that a minimum package of validation experiments has been conducted and yields satisfactory results [6].
Summary of Chapters
Chapter – 1: Introduction: Provides an overview of bioanalytical techniques, chromatography fundamentals, sample preparation methods, and the specific profiles of the Active Pharmaceutical Ingredients (APIs) under study.
Chapter-2: Development and validation of RP-HPLC methods for quantitative determination of some bioactive molecules in human plasma: Details the experimental design, optimization of the HPLC method, and validation results for the simultaneous determination of Azilsartan and Chlorthalidone.
Keywords
HPLC, Azilsartan medoxomil potassium, Chlorthalidone, Bioanalytical method validation, Human plasma, Solid Phase Extraction (SPE), Pharmacokinetics, Bioavailability, Bioequivalence, Chromatographic separation, Sensitivity, Selectivity, Stability.
Frequently Asked Questions
What is the primary goal of this research?
The study aims to develop and validate a sensitive and efficient HPLC method for the simultaneous quantification of Azilsartan medoxomil potassium and Chlorthalidone in human plasma.
Which analytical technique is primarily used?
The work utilizes Reversed Phase High Performance Liquid Chromatography (RP-HPLC) combined with Solid Phase Extraction (SPE).
What are the main therapeutic categories of the drugs studied?
Both drugs are primarily used as antihypertensive agents.
How is the sensitivity of the method ensured?
Sensitivity is optimized through careful selection of the chromatographic column, mobile phase composition, and efficient sample extraction techniques to reduce background noise.
Which sample preparation method was found most effective?
Solid Phase Extraction (SPE) was selected over Protein Precipitation (PPT) because it provided better recovery and cleaner samples for analysis.
How is method reliability demonstrated?
Reliability is established through comprehensive validation procedures, including testing for linearity, selectivity, accuracy, precision, and stability, following USFDA guidelines.
Why is SPE preferred over liquid-liquid extraction?
SPE is preferred as it excludes lengthy steps such as solvent evaporation and reconstitution, thereby saving time and reducing potential errors.
What is the significance of the plasma concentration-time profile?
It is used to assess pharmacokinetic parameters like Cmax, Tmax, and AUC, which are essential for determining the bioavailability and therapeutic effectiveness of the drug.
Does the method account for matrix effects?
Yes, matrix effect experiments were conducted to evaluate the influence of different sources of human plasma on the measurement of the analytes, demonstrating negligible endogenous interference.
How long are the samples stable?
Stability studies confirmed that the analytes remain stable in plasma for at least 35 days at -20°C and under bench-top conditions for at least 6 hours.
- Quote paper
- Dr. Vijay Ram (Author), Hitendra S. Joshi (Author), Paras P. Vekariya Rajesh Ram (Author), 2014, Development and validation of HPLC method for simultaneous quantitative determination of Azilsartan medoxomil potassium and Chlorthalidone in human plasma, Munich, GRIN Verlag, https://www.grin.com/document/286149
