Journal of Analytical Science and Technology
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UPLC/FT-ICR MS-based high-resolution platform for determining the geographical origins of raw propolis samples
Journal of Analytical Science and Technology - Tập 10 - Trang 1-12 - 2019
In this study, we demonstrate a high-resolution 15 Tesla Fourier transform ion
cyclotron resonance (FT-ICR) mass spectrometry coupled with a reverse-phase
ultra-performance liquid chromatography (RP-UPLC) system for determining the
geographical origins of raw propolis samples. The UPLC/FT-ICR MS-based
high-resolution platform was validated on the ethanol-extracted propolis (EEP)
from various propo...
Bioanalysis of alpelisib using liquid chromatography–tandem mass spectrometry and application to pharmacokinetic study
Journal of Analytical Science and Technology - Tập 13 - Trang 1-13 - 2022
Alpelisib is the first alpha-specific phosphatidylinositol-3-kinase (PI3K)
inhibitor indicated for the treatment of hormone receptor-positive, human
epidermal growth factor receptor 2-negative, PI3K catalytic subunit
alpha-mutated, advanced, or metastatic breast cancer. Substantial attempts have
been made to extend its clinical use to other types of cancer. Analytical
methods proven to accurately ...
A rapid assessment method for determination of iodate in table salt samples
Journal of Analytical Science and Technology - Tập 4 - Trang 1-6 - 2013
In the present work, a simple and rapid method for determination of iodate is
described. Iodometric reaction between iodate, excess iodide, and acid has been
used, and the iodine liberated is allowed to react with variamine blue (VB) dye
in the presence of sodium acetate to yield a violet-colored species. A
calibration curve was obtained in the concentration range of 2 to 30 μg of
iodate in a fina...
UHPLC‐Q‐TOF‐MS/MS‐guided dereplication to study chemical constituents of Hedera nepalensis leaves in northern Vietnam
Journal of Analytical Science and Technology - Tập 14 - Trang 1-13 - 2023
Hedera nepalensis is commonly used as a traditional medicine for the treatment
of several diseases. In this research, the efficient characterization of
chemical constituents, especially triterpenoid saponins, contained in H.
nepalensis extract was established by applying ultra‐high‐performance liquid
chromatography‐quadrupole time‐of‐flight tandem mass spectrometry method
(UHPLC‐Q‐TOF‐MS/MS). As a...
Environmentally preferable solvents promoted resolution of multi-component mixtures of amino acids: an approach to perform green chromatography
Journal of Analytical Science and Technology - Tập 4 - Trang 1-6 - 2013
Amino acids are the building blocks of proteins and found in structural tissues
of the human body. Their deficiency may cause a number of diseases. Amino acids
were analysed by the proposed thin layer chromatographic system using silica gel
as stationary phase and Ethanol/70% aq. ethylene glycol/acetone (5:3:1) as
mobile phase. Separations of some closely related amino acids from their
quaternary,...
A novel cysteine catalytic oxidation-based colorimetric approach for sensitive analysis of acute pancreatitis-related microRNA
Journal of Analytical Science and Technology - Tập 14 - Trang 1-7 - 2023
It is essential to establish simple, sensitive and accurate quantitative
approaches for microRNAs (miRNAs) identification due to its crucial roles in a
variety of physiological and pathological processes. Herein, we propose a novel
RCA-based colorimetric method for sensitive and reliable miRNA analysis. In this
approach, cyclization of the padlock sequence by miRNA-21 initiates the RCA to
produce ...
Accessible analytical methodology for assessing workplace contamination of antineoplastic drugs in limited-resource oncology health-care settings
Journal of Analytical Science and Technology - Tập 7 - Trang 1-9 - 2016
Environmental monitoring of workplaces where antineoplastic drugs are handled
constitutes an essential tool to assess occupational exposures among health-care
workers. Consequently, availability of simple, sensitive, and affordable
analytical methodologies is needed, particularly in health-care settings with
limited resources that restrict environmental monitoring studies. Previously
validated met...
HPLC-CUPRAC post-column derivatization method for the determination of antioxidants: a performance comparison between porous silica and core-shell column packing
Journal of Analytical Science and Technology - Tập 9 - Trang 1-9 - 2018
An HPLC method employing a post-column derivatization strategy using the cupric
reducing antioxidant capacity reagent (CUPRAC reagent) for the determining
antioxidants in plant-based materials leverages the separation capability of
regular HPLC approaches while allowing for detection specificity for
antioxidants. Three different column types, namely core-shell and porous silica
including two chemi...
Selective and sensitive determination of Cd(II) ions in various samples using a novel modified carbon paste electrode
Journal of Analytical Science and Technology - Tập 10 Số 1 - 2019
Isotopic variations of Sm, Gd, Er and Yb found in planetary materials caused by neutron-capture reactions in nature
Journal of Analytical Science and Technology -
AbstractThe isotopic shifts of 149Sm–150Sm and 157Gd–158Gd have often been
observed in meteorites and lunar surface materials, because they result from the
neutron-capture reactions associated with secondary neutrons produced by
cosmic-ray irradiation. While the Sm and Gd isotopic shifts can mainly be used
for the estimation of thermal neutron fluences that of 167Er–168Er has recently
been applied...
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