Published in Journal of Analytical Chemistry
Approaches to the evaluation of generalized wine quality indices based on a set of the quantitative characteristics of single parameters and their organoleptic rating were studied with the use of statistical-probability simulation methods. A general linear model (multiple linear regression) was constructed to predict degustation evaluation values f...
Published in Journal of Analytical Chemistry
Components of the purple corn husk anthocyanin complex as a rich inedible source for the preparation of natural dyes were analyzed by reversed-phase HPLC with spectrophotometric and mass-spectrometric detection. The wide speciation of anthocyanins was found and its main components were identified as malonylation products of cyanidin-3-glucoside, 3″...
Published in Journal of Analytical Chemistry
Black deposit was discovered on the inner wall of a sphero-conical vessel found during archaeological excavations on the territory of the Volga Bulgars. Compounds from the deposit were extracted with organic solvents and studied by gas chromatography with flame ionization and mass spectrometry detectors. Abietic acid derivatives, including retene, ...
Published in Journal of Analytical Chemistry
A possibility of the determination of polyhexamethylene guanidine (PHMG) by voltammetry at an interface between two immiscible electrolyte solutions water–o-nitrophenyl ether is shown. An electrochemical sensor based on a microperforated polymer film is created to implement the method. Factors affecting the formation of the analytical signal were s...
Published in Journal of Analytical Chemistry
A method is proposed for the rapid identification of mineral waters by impedance spectroscopy combined with chemometric experimental data processing by projection to latent structures. Measurement conditions are optimized and performance characteristics are estimated. Possibilities of the extraction of qualitative and quantitative information on th...
Published in Journal of Analytical Chemistry
The ion−salt composition of soils from the Chinarev oil and gas field (West Kazakhstan Region) was studied. A semiconductor sensor based on indium antimonide (InSb) and classical ion-selective electrodes were used to analyze soil extracts. Comparative results of determinations of pH, HCO3- Cl–, and SO42- in soil samples with a semiconductor InSb-el...
Published in Journal of Analytical Chemistry
The application of a piezosensor array to the assessment of the conditions of the digestive tract of birds by the presence and concentrations of dysbiosis markers in the equilibrium gas phase over the biosamples is discussed. A dysbiosis index is proposed for the rapid screening diagnosis of the dysbiosis status of intestines, calculated by the out...
Published in Journal of Analytical Chemistry
A comprehensive approach to the determination of the elemental composition of oils (including those with a viscosity of 5000 mm2/s) is proposed. It ensures the determination of the most elements present in oils using two versions of sample preparation, autoclave decomposition of oil samples and extraction preconcentration of elements from oil into ...
Published in Journal of Analytical Chemistry
The possibility of using diantipyrylmethane as an ionophore component of a lead-selective electrode membrane was assessed. Membrane composition (wt %) was optimized: polyvinyl chloride (31.89), dioctyl sebacate (63.81), diantipyrylmethane (2.50), and oleic acid (1.80). The proposed model of the electrode works in the concentration range of 1 × 10–5...
Published in Journal of Analytical Chemistry
The surface of a gold disk electrode, for the first time, was modified with a self-assembled monolayer of a synthesized compound, ethyl [(methythio)carbonothioyl] glycinate (ECTG), for construction of an electrode sensitive to riboflavin (vitamin B2). The electrochemical properties of the monolayer assembled on the gold disk were investigated by cy...
