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
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
Process for the Purification of cis-p-Coumaric Acid by Cellulose Column Chromatography after the Treatment of the trans Isomer with Ultraviolet IrradiationAnalytical Sciences - Tập 34 - Trang 1195-1199 - 2018
Takahiko Mitani, Hisa Mimura, Keiko Ikeda, Mitsunori Nishide, Masanori Yamaguchi, Hajime Koyama, Yukinori Hayashi, Hidefumi Sakamoto
A methanolic solution of trans-p-coumaric acid was exposed to ultraviolet radiation and a mixture solution of the trans and cis isomers was subjected to cellulose column chromatography, eluting with an aqueous 0.1% trifluoroacetic acid solution containing methanol (90:10, v/v). Separation of the trans and cis isomers was achieved. The identity of the cis isomer was confirmed by TLC, HPLC, and NMR....... hiện toàn bộ
Immobilized Enzyme-Based Microtiter Plate Assay for Ethanol in Alcoholic BeveragesAnalytical Sciences - Tập 15 - Trang 447-450 - 1999
Hiroyuki Ukeda, Miki Ohira, Masayoshi Sawamura
A method for the determination of ethanol using alcohol oxidase (AOD), peroxidase (POD), and 2,2′-azino-bis(3-ethyl-benzthiazoline-6-sulfonic acid) (ABTS) was developed in which those enzymes were separately immobilized on the inside surface of each well of a 96-well microtiter plate. Prior to immobilization, the surface was activated with glu-taraldehyde. The activation conditions remarkably affe...... hiện toàn bộ
Spectrophotometric Determination of Tranexamic Acid in Pharmaceutical Bulk and Dosage FormsAnalytical Sciences - Tập 21 - Trang 1133-1136 - 2005
Tariq Mahmood Ansari, Asad Raza, Atta-ur Rehman
In this study, a simple, fast, accurate and sensitive spectrophotometric method has been developed for the determination of tranexamic acid in bulk and pharmaceutical preparations. The method is based on the reaction of ninhydrin with the primary amino group of tranexamic acid in the basic medium at pH 8.0. The reaction produces a bluish-purple color which absorbs maximally at 565 nm. Beer’s law w...... hiện toàn bộ