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The development of novel techniques for sample collection, preparation, bio analytical methods, and method validation is necessary to meet the pharmaceutical industries' demands for high throughput analysis and screening. It is very desirable to use bio analytical methods for drug research and discovery as well as impurity profiling to preserve the efficacy, safety, and quality of medications. This review searches for new research on the validation of bio analytical techniques and the creation of bio analytical technique employing biological fluids such as plasma, serum, urine, saliva etc. We also keep an eye out for research that addresses the many methods of sample preparation that are employed in bio analysis. Any analytical method’s validation aids in producing accurate data, which are essential for making wise judgments regarding patient safety and medication dosage. Sample preparation and method validation are required to demonstrate the efficacy of the procedure and the analytical results. Nowadays, it is generally recognized that bio analysis is essential to the PK (pharmacokinetic) and PD (pharmacodynamics) assessment of a new chemical entity, starting from the periods of discovery and continuing through the many stages of development of drugs that lead to the drug’s approval for commercialization. This study systematically assesses significant bio analytical validation criteria, including accuracy, precision, sensitivity, selectivity, quantification limits, range and recovery. This review also discusses the latest FDA (Food and Drug Administration) standards for sample preparation methods and chemical extraction from different biological matrices. The practical and regulatory perspectives that researchers may employ to develop and evaluate the bio analytical technique are the main emphasis of the current study.
Keywords
Sample preparation and extraction techniques, Bio-analytical method development, Validation parameters, US FDA guideline, Applications
Introduction
The main reason for evaluating the existence of drug in bodily fluids in the initial stages of toxicology and forensic medicine was to assess the risk of overdose. The requirement to gauge drug levels in living fluids was exacerbated in the 1930s with the scientific discovery of pharmacokinetic. The development of chromatographic methods, such as paper chromatography, in the 1940s allowed for the separation of drugs from their metabolites. Pharmaceuticals in biological fluids were measured using thin layer chromatography, which was developed later in the 1950s and primarily used for the separation of radiolabeled metabolites. The development of a trustworthy bio analytical method or procedure is essential during preclinical studies and clinical stages of the creation of medications. Consequently, it is well acknowledged that in order to prove the method's effectiveness and dependability, preparing samples and method validation are necessary. Numerous excellent review articles addressing different scientific and technological facets of bio analysis have been added to the literature in recent years. From the time of discovery to be point of market authorization, it is now widely accepted that bio analysis is essential to the pharmacokinetic and pharmacodynamics characterization of novel chemical entities [1]. By using bio analytical procedures, drug concentration and their byproducts in a living matrix (serum, urine, plasma, saliva etc.) can be determined. It is a vital phase in the formulation of a medication. In spite of the use of chromatographic instruments, such as LC-MS (Liquid chromatography-Mass spectroscopy) and HPLC (High performance liquid chromatography), the concentration of a living matrix can be estimated. Bio analysis operates an enormous part in the research of toxicological inspection, pharmacokinetics, and pharmacodynamics during drug development [2]. A biological matrix for a medication is collected, processed, stored, and examined as part of the process. Bio analytical technique validation is the process of recording a particular laboratory study that has been development and approved in order to demonstrate drug substance in a specified living matrix [3]. To confirm that a method for quantitatively evaluating analytes in the biological matrix is reliable and repeatable for its intended use, several examples of “bio analytical method validation” procedures are presented. Finding the concentration of drugs in biological fluid using such techniques is necessary for a number of studies, including those involving drug concentration and its metabolic products, bioavailability, bioequivalence, pharmacokinetics, innovative drug development, critical biomedical and pharmaceutical sciences research, and surveillance of therapeutic drugs [4, 5]. Developments in analytical methodology and validation carry out essential tasks in drug discovery, development, and production. An analytical measure's primary goal is to obtain enduring, accurate, and logical knowledge. In order to accomplish this goal, established analytical techniques are crucial. Analytical results' uniformity, legitimacy, and standard can be chosen using the validation technique's results [6]. The evolution required to support particular research for the various degrees of validation to prove the method's validity Bio analytical procedures were validated during:
•While creating and applying a new bio analytical technique.
•To analyze a novel drug entity.
•To strengthen an existing technique by including metabolite measurement.
•The dissemination of bio analytical techniques among analysts or laboratories [7].
Plasma, urine, cerebral spinal fluid (CSF), organs like the liver and brain, and cell-based in vitro samples are examples of common biological matrices. There are now three types of methods that are employed to support these analyses. Chromatography based methods include ligand-based techniques such as radio immune assay (RIA) and enzyme linked immune sorbent assay (ELISA), gas chromatography with electrochemical detector (GC-ECD), high performance liquid chromatography with ultraviolet detector (HPLC-UV) and mass spectrometry-based techniques comparable to GC-MS and LC-MS [8]. One indirect way to determine a medicine's bioavailability is to look for the drug in urine. Drugs that have not been absorbed following an oral dosage or that have been ejected by biliary secretion following systemic absorption may be represented by estimates of drug in feces. The salivary levels of drug reflect the concentration of free medication instead of whole blood drug level since only the free drug since only the free drug diffuses into the saliva. Consequently, the exact proportion of drug concentration in plasma to saliva is frequently less than 1. The easiest way of evaluating a drug’s pharmacokinetics in the human body is by assessing the amount present in the bloodstream, serum or plasma. Drug concentration changes in plasma will correlate with changes in tissue drug concentration if the drug in plasma and the tissues are in dynamic equilibrium [9]. Among the methods frequently employed in bio analytical research are:
Fig No. 1 Techniques used in Bio analysis
1 Biomatrices that is pertinent to bio analysis
Bio analytical investigation needs the examination of several types of biological matrices. Furthermore, the challenges presented by each matrix vary. For example, plasma has a higher content of phospholipid than urine, which has a higher percentage of salt [3]. Numerous bio fluids including blood, blood products, plasma, serum, spit, urine etc. are used in traditional bio analysis [4]. In recent times, biological specimens have also been generated from human excrement, hair, and breast milk [10]. Here are a few examples of biological matrices utilized in bio analysis:
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Kajal Bansode
Corresponding author
Research Student, Government College of Pharmacy Karad, Shivaji University Kolhapur, Maharashtra, India-415124
Kajal Bansode*, Pratiksha Rajguru, Kiran Ukey, Rugved Sathwane, A Concise Review on Bioanalytical Method Development and Validation with Special Emphasis on Sample Preparation, Int. J. Sci. R. Tech., 2025, 2 (6), 483-505. https://doi.org/10.5281/zenodo.15675987
10.5281/zenodo.15675987
