Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Construction of Pt/Ni/NiFe 2 O 4 /C nanocomposite with one dimensional hollow structure for portable glucose sensing application
In this report, we present the design and preparation of platinum deposited Ni/NiFe2O4/Carbon composite (Pt/Ni/NiFe2O4/C) derived from Ni/Fe metal-organic frameworks (MOFs) followed by Pt deposition. Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and electron microscopy (EM) were utilized to analyze the crystal structure, morphology, and chemical composition of the resulting materials. The glucose sensing capabilities of the optimal Pt/Ni/NiFe2O4/C-3 were assessed using amperometry methods on a smartphone-based portable device. Acting as a nonenzymatic glucose s...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 26, 2024 Category: Chemistry Authors: Chengqi Feng Zhiyuan Chen Haoyong Yin Jianying Gong Hui Wang Shengji Wu Ling Wang Source Type: research

Sandwich-like voltametric immunosensing of interleukin-8 based on β-cyclodextrin/carbon nanotubes and methylthionine chloride@UIO-66 framework
Anal Sci. 2024 Apr 25. doi: 10.1007/s44211-024-00574-y. Online ahead of print.ABSTRACTThe level of interleukin-8 (IL-8) in the body is an effective factor for the early diagnosis of acute tubular necrosis and oral tumor. In this work, a novel sandwich-like voltametric immunosensor (SVS) of IL-8 was constructed by preparing β-cyclodextrin/carbon nanotube (CD/CNT) to immobilize primary antibody (PAb) of IL-8 and UIO-66-NH2 MOFs structure to immobilize second antibody (SAb) and methylene blue (Mb) probe. In this designed SVS, the prepared CD/CNT nanohybrid with large surface area and conductivity can immobilize PAb via simpl...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 25, 2024 Category: Chemistry Authors: Zhihua Zhou Jiajia Lin Daoping Yue Huaiyu Chen Sheng Chen Source Type: research

Extraction spectrophotometry using a lithium-ion selective metallacrown: temperature effect on extraction reaction and application to determination of lithium in serum and seawater
Anal Sci. 2024 Apr 23. doi: 10.1007/s44211-024-00569-9. Online ahead of print.ABSTRACTA metallacrown-type ionophore, 2,3-pyridinediolate-bridged (3,5-dimethylanisole)ruthenium trinuclear complex, has a high extraction selectivity for Li+, but the extraction reaction is very slow. To solve this problem, the effect of temperature on the rapidity and equilibrium of the extraction of Li+ and Na+ as picrates from water to toluene with the metallacrown was investigated in this study. While the extraction of Li+ requires 6 h of shaking for equilibration at 25 °C, the distribution ratio becomes nearly constant after 4 h and 2 h o...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 23, 2024 Category: Chemistry Authors: Shoichi Katsuta Kosuke Maeda Source Type: research

Evolution of myoglobin diffusion mechanisms: exploring pore and surface diffusion in a single silica particle
This study elucidates the mass transfer mechanism of myoglobin (Mb) within a single silica particle with a 50 nm pore size at various pH levels (6.0, 6.5, 6.8, and 7.0). Investigation of Mb distribution ratio (R) and distribution kinetics was conducted using absorption microspectroscopy. The highest R was observed at pH 6.8, near the isoelectric point of Mb, as the electrostatic repulsion between Mb molecules on the silica surface decreased. The time-course absorbance of Mb in the silica particle was rigorously analyzed based on a first-order reaction, yielding the intraparticle diffusion coefficient of Mb (Dp). Dp-(1 + R)...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 23, 2024 Category: Chemistry Authors: Akihisa Miyagawa Hatsuhi Kuno Shigenori Nagatomo Kiyoharu Nakatani Source Type: research

Optimizing analytical precision in the identification of synthetic cathinones and isomers: a comparative assessment of diverse GC-MS operating parameters
This study endeavors to assess and compare peak resolution in the analysis of illicit drugs, specifically focusing on 21 synthetic cathinones, encompassing 9 cathinone isomers. Varied GC-MS operating conditions, including distinct GC-MS columns and thermal gradients, were systematically employed for the simultaneous analysis of these synthetic cathinones. The study utilized HP-1 nonpolar and HP-5MS low-bleed columns to achieve optimal analyte resolution through modulation of GC-MS oven conditions. Mass spectra were meticulously recorded within a mass-to-charge (m/z) range spanning from 40 to 500 in full scan mode. The data...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 22, 2024 Category: Chemistry Authors: Li-Ping Tseng Yung-Sheng Lan Yung-Hung Lee Yi-Cheng Lee Yi-Cheng Chou Hei-Hwa Lee Mei-Ying Chang Shih-Shin Liang Yi-Ching Lin Source Type: research

Ordered mesoporous hairbrush-like nanocarbon assembled microfibers for solid-phase microextraction of benzene series in oilfield sewage
Anal Sci. 2024 Apr 20. doi: 10.1007/s44211-024-00506-w. Online ahead of print.ABSTRACTThe development of advanced functional nanomaterials for solid-phase microextraction (SPME) remains an imperative aspect of sample pretreatment. Herein, we introduce a novel SPME fiber consisting of graphene fibers modified with ordered mesoporous carbon nanotubes arrays (CNTAs) tailored for the determination of benzene series in oilfield wastewater, which is synthesized by an ionic liquid-assisted wet spinning process of graphene nanosheets, followed by a precisely controlled growth of metal-organic framework and subsequent pyrolysis tre...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 20, 2024 Category: Chemistry Authors: Zhuo Han Gangzhu Li Mo Li Yanbo Zhang Zhaoyu Meng Source Type: research

Optical fiber chemical sensing of anionic surfactants using a microfluidic polymer chip with embedded ion-selective fluorescence optode
This study introduces a novel microfluidic polymer chip system that employs an embedded anionic surfactant (AS) ion-selective fluorescence optode (AS fluorescence optode) as a detector for measuring AS. The AS fluorescent optode comprises a lactone form of rhodamine B (L-RB) embedded in 2-nitrophenyl octyl ether plasticized poly (vinyl chloride) membrane. The AS fluorescence optode demonstrated a linear correlation between fluorescence intensity peak heights and AS concentrations within the range of less than 20 µM under optimal flow conditions. The limit of detection for AS was approximately 0.06 µM. The microfluidic sy...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 20, 2024 Category: Chemistry Authors: Ryu Konno Ryo Yamada Mika Hanayama Takashi Masadome Source Type: research

Temperature imaging inside fluid devices using a ratiometric near infrared (NIR-II/III) fluorescent Y 2 O 3 : Nd 3+ , Yb 3+ , Er 3+ nanothermometer
Anal Sci. 2024 Apr 15. doi: 10.1007/s44211-024-00564-0. Online ahead of print.ABSTRACTLuminescence thermometry is a non-contact method that can measure surface temperatures and the temperature of the area where the fluorescent probe is located, allowing temperature distribution visualizations with a camera. Ratiometric fluorescence thermometry, which uses the intensity ratio of fluorescence peaks at two wavelengths with different fluorescence intensity dependencies, is an excellent method for visualizing temperature distributions independent of the fluorophore spatial concentration, excitation light intensity and absolute ...
Source: Analytical Sciences : the international journal of the Japan Society for Analytical Chemistry - April 15, 2024 Category: Chemistry Authors: Masakazu Umezawa Hikaru Haraguchi Gaku Sugawara Konosuke Sato Hiroyuki Kurahashi Teiji Oda Kyohei Okubo Kohei Soga Source Type: research