Square-wave Adsorptive Anodic Stripping Voltammetric Determination of Antidiabetic Drug Linagliptin in Pharmaceutical Formulations and Biological Fluids Using a Pencil Graphite ElectrodeAnalytical Sciences - Tập 36 - Trang 1031-1038 - 2020
Ahmed H. Naggar, Gamal A. Saleh, Mahmoud A. Omar, Ahmed M. Haredy, Sayed M. Derayea
A simple, sensitive, low-cost, quick and reliable square-wave anodic stripping voltammetric method is described for the determination of the antidiabetic drug Linagliptin (LNG) in pure form, tablets, and spiked human urine and plasma samples. Using a pencil graphite electrode (PGE), cyclic voltammetry (CV) was applied to study the electrochemical behavior of LNG. In a Teorell-Stenhagen buffer (pH ...... hiện toàn bộ
Determination of Sub-nmol Hydrogen Peroxide by Electrochemiluminescence of Luminol in Aqueous SolutionAnalytical Sciences - Tập 4 - Trang 9-12 - 1988
Sachiko Sakura, Hideo Imai
An electrochemiluminescence method was developed for determination of sub-nmol hydrogen peroxide in aqueous solution. Luminol was electrochemically oxidized, then reacted with hydrogen peroxide; it emitted light of the maximum wavelength of 436 nm with a half-life of less than 0.2 s from the electrode surface. In flow injection analysis a carrier solution (phosphate buffer, pH 7–9) containing 17 μ...... hiện toàn bộ
Grazing Incidence X-ray Diffraction Analysis of Zeolite NaA Membranes on Porous Alumina TubesAnalytical Sciences - Tập 22 - Trang 961-964 - 2006
Tomohiro Kyotani
Zeolite NaA-type membranes hydrothermally synthesized on porous alumina tubes, for dehydration process, were characterized by grazing incidence 2θ scan X-ray diffraction analysis (GIXRD). The fine structure of the membrane was studied fractionally for surface layer and for materials embedded in the porous alumina tube. The thickness of the surface layer on the porous alumina tube in the membranes ...... hiện toàn bộ
Separation and Determination of Nitrofuran Antibiotics in Turbot Fish by Microemulsion Electrokinetic ChromatographyAnalytical Sciences - Tập 25 - Trang 861-864 - 2009
Ting-Fu Jiang, Zhi-Hua Lv, Yuan-Hong Wang, Mei-E Yue, Shuai Lian
A microemulsion electrokinetic chromatography (MEEKC) method has been developed for the determination of four nitrofuran antibiotics (furazolidone (FZD), furaltadone (FTD), nitrofurazone (NFZ) and nitrofurantoin (NFT)) in turbot fish. The effect of buffer the pH, the concentration of SDS and the concentrations of octane and butan-1-ol were studied systematically. With the optimized experimental co...... hiện toàn bộ
Simultaneous Detection of Nucleic Acid and Protein Using Gold Nanoparticles and Lateral Flow DeviceAnalytical Sciences - Tập 30 - Trang 637-642 - 2014
Xun Mao, Anant Gurung, Hui Xu, Meenu Baloda, Yuqing He, Guodong Liu
In this work, we present a simple and fast approach for simultaneous detection of nucleic acid and protein using gold nanoparticles (GNPs) and a lateral flow device (LFD). Sandwich-type immunoreactions and DNA hybridizations were performed simultaneously on the LFD by using DNA- and antibody-functionalized GNPs. The captured GNPs, due to the DNA hybridization and immunoreaction events on the LFD, ...... hiện toàn bộ
Determination of Residual Clopidol in Chicken Muscle by Capillary gas Chromatography-negative Chemical Ionization-Mass SpectrometryAnalytical Sciences - Tập 25 - Trang 1203-1206 - 2009
Binghu Fang, Yijuan Su, Huanzhong Ding, Jiahui Zhang, Limin He
A selective, sensitive gas chromatography-mass spectrometry (GC-MS) method with negative chemical ionization (NCI) was developed for the detection and quantification of clopidol in chicken muscle. Chicken muscle samples were extracted with acetonitrile and concentrated to dryness; the residue was redissolved in ethyl acetate and applied to an Alumina B cartridge for cleanup. The residue was deriva...... hiện toàn bộ