Yeonkyopaedok-san is a traditional Korean medicine used in the early treatment of boils. In the present study, its 12 marker components for quality control were determined using high-performance liquid chromatography (HPLC) with photodiode array detection and ultra-performance liquid chromatography&ndash / mass spectrometry with tandem mass spectro...
Nowadays, the analysis of the multi-components in Chinese patent medicine prescriptions is being paid more attention. Therefore, in this study for the first time, a simple, rapid ultrahigh performance liquid chromatography&ndash / electrospray ionization tandem mass spectrometry (UHPLC-ESI-MS/MS) method was established for simultaneous determinatio...
Doenjang, a Korean fermented soybean paste, is vulnerable to contamination by mycotoxins because it is directly exposed to environmental microbiota during fermentation. A method that simultaneously determines 20 mycotoxins in doenjang, including aflatoxins (AFs), ochratoxin A (OTA), zearalenone (ZEN), and fumonisins (FBs) with an immunoaffinity col...
Published in Journal of Analytical Chemistry
AbstractIn this study, cloud point extraction‒scanometry as a new, simple and inexpensive method was developed for the separation, preconcentration and determination of trace amounts of brilliant green (BG) and basic fuchsin (BF) in mixture. The method is based on the extraction of analytes simultaneously from aqueous solution using a non-ionic sur...
Published in Ecological Chemistry and Engineering S
The performance of electrothermal vaporization (ETV) and laser ablation (LA) of dry aerosols as sample introduction systems for microwave induced plasma optical emission spectrometry (MIP OES) are compared and evaluated in terms of detection limits, precision and accuracy for the determination of trace elements (Ca, Cd, Cu, Fe, Mg, Mn, Sr, Zn) in t...
A hybrid nanocomposite consisting of hydroxylated multi-walled carbon nanotubes (MWCNTs&minus / OH) and cube mesoporous carbon (CMK&minus / 8) was applied in this study to construct an MWCNT&minus / OH/CMK&minus / 8/gold electrode (GE) electrochemical sensor and simultaneously perform the electro-reduction of olaquindox (OLA) and carbadox (CBX). Th...
A copper sulfide nanoflakes-decorated carbon nanofragments-modified glassy carbon electrode (CuS-CNF/GCE) was fabricated for the electrocatalytic differentiation and determination of hydroquinone (HQ) and catechol (CC). The physicochemical properties of the CuS-CNF were characterized by scanning electron microscopy, transmission electron microscopy...
Published in Pharmaceutical Chemistry Journal
Anew simple, precise, selective and reproducible reversed-phase ultra-high performance liquid chromatography (RP-UHPLC) method has been developed and validated for the first time in simultaneous determination of two anti-diabetic drugs, sitagliptin (SN) and dapagliflozin (DN), in lipid-based self-nanoemulsifying formulations as a new combined prepa...
Published in International journal of molecular sciences
In this study, a chitosan hydrogel supported with ceria (labelled Ce-CTS) was prepared by an encapsulation technique and used for the efficient removal of excess B(III) from aqueous solutions. The functionalisation of chitosan with Ce(IV) and the improvement in the adsorptive behaviour of the hydrogel were determined by SEM-EDS, FTIR, XRD, and indu...
Published in Pharmaceutical Chemistry Journal
Stability indicating RP-UPLC-DAD method for simultaneous determination of olmesartan medoxomil (OLM) and amlodipine besylate (AML) in tablet dosage forms has been developed. The method was fully validated, showing satisfactory data for all suitability parameters tested. The study of degradation products showed that OLM and ALM are more stable with ...
