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Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry

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https://www.readbyqxmd.com/read/28993597/using-laser-interference-lithography-in-the-fabrication-of-a-simplified-micro-and-nanofluidic-device-for-label-free-detection
#1
Taiga Ajiri, Haruya Kasa, Masatoshi Maeki, Akihiko Ishida, Hirofumi Tani, Junji Nishii, Manabu Tokeshi
Recently, we developed a label-free detection method based on optical diffraction, and implemented it in on our fabricated micro- and nanofluidic device. This detection method is simple and useful for detecting biomolecules, but the device fabrication consists of complicated processes. In this paper, we propose a simple method for fabricating the micro- and nanofluidic device; the fabrication combines laser interference lithography with conventional photolithography. The performance of a device fabricated by the proposed method is comparable to the performance of the device in our previous study...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993596/polycrystalline-boron-doped-diamond-electrolyte-solution-gate-field-effect-transistor-applied-to-the-measurement-of-water-percentage-in-ethanol
#2
Yukihiro Shintani, Hiroshi Kawarada
A polycrystalline diamond electrolyte-solution-gate field-effect transistor (BDD-SGFET) was successfully applied to the analysis of water content in ethanol. Due to the use of a no-gate-insulator FET, the developed sensor showed a four-times-faster response than the conventional Si-FET, and a ten-times-faster response than a glass electrode. The output voltage showed good linearity with respect to the water content. This result is of practical importance because the traditional water content measurement methods are impractical due to their slow response...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993595/optimization-of-analytical-conditions-for-a-rapid-determination-of-aniline-in-environmental-water-by-liquid-chromatography-tandem-mass-spectrometry
#3
Koji Furukawa, Makoto Hashimoto, Satoshi Kaneco
A rapid determination of aniline in environmental water was examined based on liquid chromatography/tandem mass spectrometry (LC/MS/MS). Environmental water samples were diluted 20-fold with Mill-Q water and measured by LC/MS/MS after adding a surrogate substance (aniline-d5). In the results of the present study, the calibration curve of aniline showed good linearity in the range of 0.05 - 2.0 μg/L. Since the RSD (repeatability) by measuring repeatedly an aniline standard solution (0.05 μg/L, n = 7) was 3...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993594/study-on-the-interaction-between-rhodamine-dyes-and-allura-red-based-on-fluorescence-spectra-and-its-analytical-application-in-soft-drinks
#4
Qianqian Sun, Liu Yang, Jidong Yang, Shaopu Liu, Xiaoli Hu
Allura red (AR) is a common food additive. It is of significance to detect AR sensitively and selectively in soft drinks. In this report, fluorescence spectra of allura red-rhodamine dyes systems were studied. In a pH 6.0 Britton-Robinson buffer medium, the fluorescence of rhodamine dyes, such as rhodamine B (RB), butylrhodamine B (BRB) and rhodamine 6G (R6G), can be quenched by AR. Impressively, the emission spectrums of the RB and BRB change slightly upon the addition of AR, but it was clear that the emission of R6G decreased dramatically in the presence of AR...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993593/a-newly-designed-solid-phase-extraction-type-collection-device-for-precise-determination-of-polycyclic-aromatic-hydrocarbons-in-air
#5
Ikuo Ueta, Moe Onikata, Koji Fujimura, Tomotaka Yoshimura, Shoji Narukami, Suguru Mochizuki, Tomohiro Sasaki, Tsuneaki Maeda
A newly designed styrene-divinylbenzene copolymer adsorbent packed solid-phase extraction (SPE)-type collection device for the quantitative determination of airborne polycyclic aromatic hydrocarbons (PAHs) containing two to five rings is reported in this manuscript. This SPE-type collection device offers rapid, easy and quantitative elution of the analytes and easier reuse. A small collection device was initially developed for investigating the basic collection and elution performances of the adsorbent with respect to PAHs...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993592/rhodol-derived-colorimetric-and-fluorescent-probe-with-the-receptor-of-carbonothioate-for-the-specific-detection-of-mercury-ions
#6
Qingxia Duan, Meng Zhang, Chunxia Sheng, Caiyun Liu, Liu Wu, Zhenmin Ma, Qiang Zhao, Zhongpeng Wang, Baocun Zhu
Developing some methods that can simply and effectively detect mercury ions (Hg(2+)) in the environment and biological systems are very important due to the problems of high toxicity and biological accumulation. Herein, we report a simple rhodol-derived colorimetric and fluorescent probe rhodol-Hg with a recognition receptor of carbonothioate for the specific determination of Hg(2+). The color of probe rhodol-Hg solution changed remarkably from colorless to pink in the presence of Hg(2+), thus rhodol-Hg could act as a "naked-eye" probe for Hg(2+)...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993591/cool-mist-scavenging-of-gas-phase-molecules
#7
Pei-Chi Wu, Ewelina P Dutkiewicz, Pawel L Urban
The purpose of analytical extractions is to simplify sample matrix without losing analyte molecules. Here we present a technique of extracting volatile compounds by scavenging gas-phase molecules with tiny liquid droplets (<10 μm). A cool mist of the extracting solvent is generated by an ultrasonic transducer, transferred to the headspace of the sample chamber under atmospheric conditions, and pushed by a small pressure difference toward a condenser. By slowly passing over the sample, the microdroplets extract volatile species present in the sample headspace, and they coalesce in a cooled zone...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993590/an-electrochemical-dna-biosensor-based-on-au-reduced-graphene-oxide-nanocomposite-for-transgenic-event-bt63-detection
#8
Chenmeng He, Yali Tang, Sai Wang, Jiahui Liu, Ying Chen, Yiyang Dong, Haijia Su, Tianwei Tan
A simple and reliable electrochemical biosensor based on an in situ synthetic Au-reduced graphene oxide (Au-RGO) nanocomposite was constructed in this work, which is considered to be a potential sensing platform for sensitive and selective Bt63 rice detection. UV-vis spectroscopy, transmission electron microscopy (TEM), and cyclic voltammograms of the surface characterization indicated that RGO was prepared successfully and Au nanoparticles were well dispersed on its surface with an average size of 20 nm. The square-wave voltammetry (SWV) response of the electrochemical marker methylene blue (MB) was chosen to monitor the probe immobilization and target hybridization event...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993589/moment-analysis-theory-for-size-exclusion-capillary-electrochromatography-with-chemical-reaction-of-intermolecular-interaction
#9
Kanji Miyabe, Nozomu Suzuki
New moment equations were developed for size exclusion capillary electrochromatography (SECEC), in which intermolecular chemical reactions simultaneously took place. They explain how the first absolute and second central moments of elution peaks are correlated with some fundamental equilibrium and kinetic parameters of mass transfer and chemical reaction in SECEC column. In order to demonstrate the effectiveness of the moment equations, they were used to predict chromatographic behavior under hypothetical SECEC conditions...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993588/multi-coloration-of-calixarene-coated-silver-nanoparticles-for-the-visual-discrimination-of-metal-elements
#10
Norioki Abe, Nobuhiko Iki
Upon mixing with metal ions such as Cd(II), Tb(III), Cu(II), Ni(II), Pb(II), Zn(II), and Co(II) at pH 10.0, solutions of silver nanoparticles (AgNPs) coated with calix[4]arene-p-tetrasulfonate (CAS-AgNP) exhibited multi-coloration from yellow to orange, violet, and green, depending on the metal elements present, which allowed for visual discrimination of the ions. This is contrary to the AgNP sensors exhibiting a uniform color change from yellow to red upon binding of a receptor molecules at the surface of AgNPs to an analyte...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993587/determination-of-three-organochlorine-pesticides-in-aqueous-samples-by-solid-phase-extraction-based-on-natural-nano-diatomite-in-packed-syringe-coupled-to-gas-chromatography-mass-spectrometry
#11
Abdollah Taghani, Nasser Goudarzi, Ghadamali Bagherian, Mansour Arab Chamjangali
A rapid, simple, and sensitive technique is proposed based on a miniaturized solid-phase extraction method named mictroextraction in a packed syringe coupled with gas chromatography-mass spectrometry for the preconcentration and determination of three organochlorine pesticides. These include hexachlorobenzene, heptachlor and aldrine in aqueous samples. For the first time, the natural nano diatomite is used a sorbent. Based on this technique, 6.0 mg of the nano sorbent is inserted in a syringe between two polypropylene frits...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993586/synthesis-of-carbon-dots-originated-from-hydroxypropylmethyl-cellulose-for-sensing-ciprofloxacin
#12
Shanshan Wang, Yingyi Wang, Kuncheng Yang, Yan Zhong, Xiaoming Yang, Zhangbao Chen
Hereby, one kind of facile carbon dots (CDs) from hydroxypropylmethyl cellulose (HPMC) has been successfully provided, which obviously emitted blue fluorescence. With the related characterizations in detail, the CDs prepared here mainly consisted of C and O, owing to the functional groups of -OH and C=O on their surfaces. Likewise, the CDs also showed multiple advantages, including excellent photostability, superior dispersity and desirable stability. Moreover, the CDs were applied for sensing ciprofloxacin due to forming complexes with ciprofloxacin, thus leading to the fluorescence quenching of CDs...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993585/determination-of-brilliant-blue-fcf-by-a-novel-solid-state-ecl-quenching-sensor-of-ru-bpy-3-2-poly-sulfosalicylic-acid-gce
#13
Xiaohui Chen, Jiahao Yin, Chao Zhang, Nian Lu, Zhidong Chen
A novel solid-state electrochemiluminescence (ECL) quenching sensor was constructed for determination of brilliant blue FCF (BB FCF). Under a simple electropolymerization step, poly(sulfosalicylic acid) (PSSA) film attached luminophore Ru(bpy)3(2+) was successfully formed on the surface of a glass carbon electrode [Ru(bpy)3(2+)-PSSA/GCE], which exhibited excellent ECL behavior. A high quenching effect on the ECL signal of the Ru(bpy)3(2+)-PSSA/GCE was obtained with the presence of low concentration of BB FCF...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993584/simultaneous-production-and-surface-functionalization-of-silver-nanoparticles-for-label-free-colorimetric-detection-of-copper-ion
#14
Elumalai Satheeshkumar, Jyisy Yang, Venkatesan Srinivasadesikan, Ming-Chang Lin
In this work, a simple method was developed to simultaneously fabricate silver nanoparticles (AgNPs) and modify their surfaces with recognition functional groups for colorimetric detection of Cu(2+) ions. To prepare the AgNPs with proper functional group on their surface for detection of Cu(2+) ions, photochemical reaction was employed and a photoactive species of tyrosine (Tyr) was used to trigger the photoreduction of AgNPs, while the oxidized Tyr (Tyr(Ox)) was used to functionalize the AgNPs surface at the same time...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993583/immunoassay-for-human-igg-using-antibody-functionalized-silver-nanoparticles
#15
Daniela M Batistela, Cassius V Stevani, Renato S Freire
A simple colorimetric immunoassay for quantification of human immunoglobulin G (hIgG) is herein described. The assay is based on the aggregation inhibition of silver nanoparticles (AgNP) functionalized with hIgG antibody (anti-hIgG) on the surface. The aggregation is measured in terms of attenuance values ratio at 400 and 530 nm (A400/A530). A linear response between A400/A530 and hIgG concentration is observed in the range 25 - 200 ng mL(-1), and the detection limit is estimated as 11 ng mL(-1) hIgG.
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993582/a-study-of-electrochemical-sensor-based-on-bhb-imprinted-magnetic-nanoparticles
#16
Yanxia Li, Lu Huang, Xiuping Wang, Yiting Chen
A study of an electrochemical sensor based on bovine hemoglobin (BHb) imprinted magnetic nanoparticles (MIPs) was investigated. First, BHb MIPs were successfully synthesized with magnetic Fe3O4@Au nanoparticles as carrier by surface modification of mercapto propionic acid for introducing carboxyl groups, combined with dopamine as the functional monomer and BHb as the template protein. Then, the MIPs were modified to the surface of a glassy carbon electrode (GCE) for electrochemical analysis by using cyclic voltammetry in the potassium ferricyanide solution...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993581/quantitative-detection-of-ambroxol-in-human-plasma-using-hplc-apci-ms-ms-application-to-a-pharmacokinetic-study
#17
Zhengsheng Mao, Xin Wang, Xin DI, Yangdan Liu, Yanan Zang, Dongke Ma, Youping Liu, Xin DI
In this study, a rapid and reliable high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the determination of ambroxol in human plasma was developed and validated using palmatine as an internal standard (IS). Ambroxol and IS were extracted from 200 μL of human plasma via a simple protein precipitation preparation. Chromatographic separation was achieved on a Platisil C18 column (150 × 4.6 mm, 5 μm) using methanol-0.01% formic acid (70:30, v/v) as the mobile phase at a flow rate of 0...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28993580/inductively-coupled-plasma-mass-spectrometry
#18
Fumitaka Esaka
No abstract text is available yet for this article.
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28890501/novel-uniform-fe3o4-hollow-spheres-for-magnetic-solid-phase-extraction-of-polycyclic-aromatic-hydrocarbons
#19
Jiangbo Xi, Juan Zhang, Haiyan Zhao
A novel magnetic absorbent based on Fe3O4 hollow nanospheres was developed for polycyclic aromatic hydrocarbons (PAHs) extraction. Fe3O4 hollow nanospheres were prepared by a one-pot facile solvothermal method and its structural properties were characterized by scanning electron microscope (SEM) and analyzer transmission electron microscopy (TEM). It was the first time to use hollow nanospheres which possess high special surface area for magnetic solid-phase extraction (MSPE). The extraction condition of Fe3O4 hollow nanospheres and its performance for PAHs was systematically investigated...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28890500/electrochemical-detection-of-hydroxylamine-via-au-pt-alloy-nanoparticle-modified-single-walled-carbon-nanotube-electrodes
#20
Yanfang Geng, Euna Ko, Van-Khue Tran, Woo Sung Chung, Chan Ho Park, Min Ki Kim, Ga Hyun Jin, Gi Hun Seong
In the present study, we developed an electrochemical sensor for highly sensitive detection of hydroxylamine using Au-Pt alloy nanoparticles. Au-Pt alloy nanoparticles were electrochemically deposited on a working electrode made of single-walled carbon nanotubes. The framework composition in the Au-Pt alloy nanoparticle was easily controlled by adjusting the Au(3+):Pt(4+) composition ratio in the precursor solution. Morphological and chemical characterizations of the resulting Au-Pt alloy nanoparticles were performed using field emission scanning electron microscopy, X-ray diffraction, and energy dispersion X-ray spectroscopy...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
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