A Critical Review of Analytical Applications of Chitosan as a Sustainable Chemical with Functions Galore

Simple colorimetric paper-based test strip for point-of-use quality testing of ethanol-based hand sanitizers

“… 41 In particular, Fe 3+ ions interact with CHT through complexation. 42 Therefore, the test paper was coated with CHT so that Fe 3+ ions could be chemically adsorbed on its surface instead of requiring physical entrapment on uncoated paper to afford the PAD with good stability and reproducibility. Different CHT concentrations were tested (0.1–0.5%).…”

Simultaneous Spectrophotometric Determination of Alogliptin and Pioglitazone Using Partial Least Squares with and without Genetic Algorithm

“…Alogliptin benzoate and pioglitazone hydrochloride pure standards were obtained from El Obour Modern Pharmaceutical Industries in El Obour City -Cairo with purities of 99.76% and 99.52% respectively according to the reported method 13 . Prandaglim Plus ® 25/30 mg tablets (labeled to contain 34 mg of alogliptin benzoate equivalent to 25 mg alogliptin and 33.06 mg of pioglitazone hydrochloride equivalent to 30 mg pioglitazone) a product of Eva Pharma, Cairo, Egypt, was obtained from local Market.…”

“…Under computer-controlled instrumentation, PLS method plays a very important role in the analysis of many pharmaceutical mixtures without previous separation by UV-VIS spectrophotometry. (9)(10)(11) The review of literature revealed a few methods reported for simultaneous determination of alogliptin and pioglitazone in combined dosage forms including UV spectrophotometric methods; first order derivative 12 , dual wavelength 12 , area under curve 13 , first derivative of ratio spectra 13 , ratio difference 13 , second-order derivative 14 , simultaneous equation 15 and absorption ratio 15 methods as well as chromatographic methods [16][17][18][19][20][21][22][23][24][25][26] .…”

Chitosan-Functionalized Methacrylate Monoliths for Mixed-Mode Hydrophilic/Electrostatic Interaction Capillary Liquid Chromatography

“…Chitosan is a linear polysaccharide composed of randomly distributed β-(1–4)-linked d -glucosamine (deacetylated unit) and N-acetyl- d -glucosamine (acetylated unit), derived from deacetylation of chitin. − It is a unique stimulus-responsive structure polymer with a pH-dependent net charge and solubility which has been used in sorbent and stationary phase materials. − Among the various merits, chitosan carries many −OH and −NH 2 groups, which promote strong hydrophilic interaction and formation of hydrogen bonds. Furthermore, the chitosan amino group provides a positive charge under acidic conditions, furnishing an electrostatic interaction.…”