Review of Determination of Chlortalidone Levels in Pharmaceutical Preparations and Biological Matrix

Chlortalidone is a compound that is often used in the pharmaceutical world as an oral drug to treat hypertension. This review article discusses the summary of methods for determining the concentration of chlorthalidone in pharmaceutical preparations and biological matrices. We took the data collected in this review article was taken through trusted sites such as Google Scholar with the search keywords "chlorthalidone determination," "pharmaceutical preparations," and "biological matrices," with a period of the last twenty years (2001-2021). This review article aims to provide an overview of the assay used to determine the concentration of chlorthalidone either in the form of a single substance or pharmaceutical dosage forms. Overall, the determination of chlorthalidone levels has been carried out using various analytical methods. Including spectrophotometry, high-performance liquid chromatography (HPLC), chemometrics and thin-layer chromatography (TLC)-densitometric, capillary zone electrophoresis (CZE) methods, spectrofluorimetric methods, liquid chromatography-mass spectrometry-mass spectrometry (LC-MS-MS) methods, ultrafast liquid chromatography (UFLC), supercritical fluid chromatography method and high-performance thin-layer chromatography (HPTLC)-densitometric method. Analysis with the HPLC technique is widely used in research because it can detect samples with the lowest concentrations up to the nanogram level.