12. Terminology on Pharmaceutical Analysis.

#	Terminology	Academic Definition	Scientific Mechanism	Real-World Application	Example
51	Pharmaceutical Analysis	The qualitative and quantitative evaluation of pharmaceutical substances and products.	Uses chemical, physical, and instrumental analytical principles.	Ensures drug identity, purity, potency, and quality.	Testing the API content of a tablet batch.
52	Assay	Quantitative determination of the amount or activity of a pharmaceutical component.	Analytical response is correlated with analyte concentration or activity.	Used to confirm that medicine strength meets specifications.	Determining paracetamol content by HPLC.
53	Chromatography	Separation of mixture components based on differential interaction with stationary and mobile phases.	Components migrate at different rates because of differences in partitioning or adsorption.	Used for drug assay and impurity testing.	Separating API and degradation products.
54	HPLC	High-performance liquid chromatography using a pressurized liquid mobile phase to separate analytes.	Compounds differ in interaction with a packed stationary phase and therefore elute at different times.	Common in pharmaceutical QC laboratories.	HPLC testing of antibiotic potency.
55	Spectroscopy	Analytical measurement of interactions between electromagnetic radiation and matter.	Molecules absorb or emit characteristic energies based on molecular structure.	Used for drug identification and quantification.	Infrared spectroscopy for raw-material identification.
56	UV-Visible Spectrophotometry	Measurement of ultraviolet or visible light absorbed by a substance.	Under defined conditions, absorbance can be related to concentration.	Used for rapid quantitative analysis.	Measuring drug concentration in a laboratory solution.
57	Mass Spectrometry	Analytical measurement of ions according to mass-to-charge ratio.	Molecules are ionized, separated, and detected based on ionic characteristics.	Used in structural identification, bioanalysis, and impurity characterization.	LC-MS analysis of drug metabolites in plasma.
58	Impurity	An unintended component present in a pharmaceutical substance or product.	May originate from synthesis, degradation, raw materials, or manufacturing.	Impurity control is essential for medicine quality and safety.	Detecting a degradation product during stability testing.
59	Calibration	Establishment of the relationship between measurement-system response and known reference values.	Uses standardized references to verify measurement accuracy.	Ensures analytical equipment produces reliable results.	Calibrating an analytical balance before use.
60	Analytical Method Validation	Documented demonstration that an analytical procedure is suitable for its intended purpose.	Evaluates characteristics such as accuracy, precision, specificity, linearity, and robustness.	Required for dependable QC and regulatory data.	Validating an HPLC assay before routine batch testing.