Related Experiment Video
Updated: Jun 28, 2026
07:43
A Validatable Droplet Digital Polymerase Chain Reaction Assay for the Detection of Adeno-Associated Viral Vectors in Bioshedding Studies of Tears
Published on: July 14, 2023
Drug determination in biological fluids-approaches to method validation
1Department of Pharmacy, The General Infirmary, Leeds, Yorkshire, England.
Talanta
|July 1, 1987
Summary
This study outlines procedures for validating analytical methods used to determine drugs and metabolites in biological fluids. These methods ensure accurate and reliable quantification for various applications.
Area of Science:
- Analytical Chemistry
- Pharmacokinetics
- Clinical Diagnostics
Background:
- Accurate quantification of drugs and metabolites in biological matrices is crucial for drug development and clinical monitoring.
- Standardized validation procedures are essential for ensuring the reliability and reproducibility of analytical results.
Purpose of the Study:
- To describe validated procedures for the determination of drugs and metabolites in biological fluids.
- To provide a framework for ensuring the quality and accuracy of bioanalytical data.
Main Methods:
- Method validation encompassing parameters such as accuracy, precision, selectivity, sensitivity, and stability.
- Application of these methods to various biological matrices like plasma, urine, and tissue homogenates.
Main Results:
- Demonstrated successful validation of analytical methods for a range of drug compounds and their metabolites.
- Established robust and reproducible bioanalytical assays suitable for routine use.
Conclusions:
- The described validation procedures provide a reliable approach for quantifying drugs and metabolites in biological fluids.
- These validated methods support accurate pharmacokinetic assessments and therapeutic drug monitoring.
More Related Videos
Related Concept Videos
01:15Data Validation
Method validation is a crucial process in analytical chemistry designed to confirm that a given method consistently produces reliable and high-quality results. This process is essential when a method is applied to different sample matrices or when procedural modifications are made, ensuring that the results meet acceptable standards across various applications.
Key parameters for method validation include:
Key parameters for method validation include:
01:22Protein-Drug Binding: Determination Methods
Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
01:13Bioequivalence studies: Biowaivers
In certain scenarios, in vitro dissolution tests can replace in vivo bioequivalence studies. This is particularly true when a drug product, though available in varying strengths, maintains proportional similarity in its active and inactive ingredients. In such cases, the need for in vivo bioequivalence studies for lower strength variants may be waived, provided dissolution tests and in vivo studies on the highest strength yield satisfactory results.Bioequivalence can be indicated through...
01:23Drug Concentrations: Measurements
Drug concentration is the quantity of a drug present in a biological sample. Measuring drug amounts in biological samples allows the clinician to understand how a drug is absorbed, distributed, metabolized, and excreted. Samples can be obtained through invasive or non-invasive methods. Invasive techniques involve surgical or parenteral interventions to gather blood, cerebrospinal fluid, or tissue biopsy. Conversely, non-invasive approaches provide samples like urine, feces, and saliva.
Plasma —...
Plasma —...
01:20Measurement of Bioavailability: Pharmacodynamic Methods
Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
01:26Therapeutic Drug Monitoring: Drug Analysis Methods
Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood or body tissues to tailor drug therapy effectively. This monitoring is critical for managing drugs with narrow therapeutic indices like digoxin and phenytoin, ensuring they are both safe and effective. For instance, monitoring theophylline levels in asthma patients involves precision and sensitivity to adjust doses according to individual responses to therapy, ensuring efficacy and...