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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/28690268/announcements
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2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690267/determination-of-menadione-by-liquid-chromatography-tandem-mass-spectrometry-using-pseudo-multiple-reaction-monitoring
#2
Maya Kamao, Yoshihisa Hirota, Yoshitomo Suhara, Naoko Tsugawa, Kimie Nakagawa, Toshio Okano, Hiroshi Hasegawa
This study aimed to develop a menadione (MD) determination method employing liquid chromatography-tandem mass spectrometry (LC-MS/MS) using a pseudo multiple reaction monitoring (MRM) technique, wherein two quadrupoles are used to monitor the same ion. Detection limits of 40 and 2 pg were obtained for MD and its deuterium-labeled form, respectively, whereas MD intra- and inter-assay coefficient of variation values were determined as 5.4 - 8.2%, with the corresponding recoveries equaling 90.5 - 109.6%. The developed method enables determination of MD in urine, plasma, cell extract, and culture media, demonstrating that pseudo multiple reaction monitoring can achieve quantification of compounds forming no suitable product ions, such as MD...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690266/on-site-determination-of-trace-arsenic-by-reflection-absorption-colorimetry-of-molybdenum-blue-collected-on-a-membrane-filter
#3
Yuya Hasegawa, Yasutada Suzuki, Susumu Kawakubo
An on-site determination method for trace arsenic has been developed by collecting it as molybdenum blue (MB) in the presence of tetradecyldimethylbenzylammonium chloride on a mixed cellulose ester membrane filter and by measuring reflection absorbance (RA) of MB on the filter using a laboratory-made palm-top size reflection-absorbance colorimeter with a red light-emitting diode. The value of RA was proportional to the amount of arsenic up to 0.5 μg with a detection limit of 0.01 μg. The proposed method was successfully applied to soil extract and hot-spring water samples...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690265/raman-imaging-analysis-of-local-crystal-structures-in-licoo2-thin-films-calcined-at-different-temperatures
#4
Kosuke Hara, Taka-Aki Yano, Kota Suzuki, Masaaki Hirayama, Tomohiro Hayashi, Ryoji Kanno, Masahiko Hara
Local crystalline structures of LiCoO2 nanothin film cathodes in a lithium ion battery have been spectroscopically elucidated through confocal Raman imaging analysis at high spatial resolution of several hundred nanometers. A significant difference in the crystalline structure is found between the nanometric thin films and bulk powders. Thermally induced local decomposition of LiCoO2 into an impurity phase on the films has also been revealed along with the mechanism of the temperature-triggered decomposition process...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690264/diffusion-controlled-mediated-electron-transfer-type-bioelectrocatalysis-using-microband-electrodes-as-ultimate-amperometric-glucose-sensors
#5
Yukina Matsui, Katsumi Hamamoto, Yuki Kitazumi, Osamu Shirai, Kenji Kano
We performed numerical simulations on an extremely fast, mediated, electron transfer-type bioelectrocatalytic reaction using a microband electrode. The simulations under fast-enzyme-kinetics conditions predicted that the decrement of the current density by increaseing the microband thickness would effectively improve the upper limit of detection. These predictions were accurate for an ultrathin-ring with thickness of 100 nm and gold leaf with thickness of 10 μm electrodes, acting as novel amperometric glucose sensors with FAD-dependent glucose dehydrogenase...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690263/direct-electron-transfer-type-bioelectrocatalysis-of-peroxidase-at-mesoporous-carbon-electrodes-and-its-application-for-glucose-determination-based-on-bienzyme-system
#6
Hong-Qi Xia, Yuki Kitazumi, Osamu Shirai, Kenji Kano
Non-catalytic direct electron transfer (DET) signal of Compound I of horseradish peroxidase (POD) was first detected at 0.7 V on POD/carbon nanotube mixture-modified electrodes. Excellent performance of DET-type bioelectrocatalysis was achieved with POD immobilized with glutaraldehyde on Ketjen Black (KB)-modified electrodes for H2O2 reduction with an onset potential of 0.65 V (vs. Ag | AgCl | sat. KCl) without any electrode surface modification. The POD-immobilized KB electrode was found to be suitable for detecting H2O2 with a low detection limit (0...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690262/colorimetric-detection-of-mercury-ii-ion-in-aqueous-solution-using-silver-nanoparticles
#7
M Lutfi Firdaus, Ikka Fitriani, Santhy Wyantuti, Yeni W Hartati, Renat Khaydarov, Jason A McAlister, Hajime Obata, Toshitaka Gamo
Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bioreductant to synthesize stable AgNPs. The prepared AgNPs have a yellowish-brown color with a surface plasmon resonance peak at 420 nm. The addition of Hg(II) ions then changes the AgNPs color to colorless. The color change was in proportion to the concentration of Hg(II) ions...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690261/improvement-of-a-phosphate-ion-selective-microsensor-using-bis-dibromophenylstannyl-methane-as-a-carrier
#8
Hisashi Satoh, Yuji Miyazaki, Shou Taniuchi, Mamoru Oshiki, Rathnayake M L D Rathnayake, Masahiro Takahashi, Satoshi Okabe
An ionophore-doped sensing membrane phosphate (PO4) microsensor based on bis(dibromophenylstannyl)methane (Bis microsensor) is described. The Bis microsensor showed a Nernstian response. The response of the Bis microsensor was log-linear down to a monohydrogen phosphate ion (HPO4(2-)) concentration of 0.5 μM (corresponding to 1.0 μM of orthophosphate at pH 7.2), whereas the detection limit of PO4-microsensors based on trialkyl/aryltin chloride was 50 μM of HPO4(2-). The Bis microsensor showed excellent selectivity for HPO4(2-) against nitrite, nitrate, chloride, bicarbonate and sulfate, as compared with PO4 microsensors based on trialkyl/aryltin chloride...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690260/rapid-quantification-of-n-methyl-2-pyrrolidone-in-polymer-matrices-by-thermal-desorption-gc-ms
#9
Young-Min Kim, Jae Woo Kim, Hye Mi Moon, Min-Jin Lee, Akihiko Hosaka, Atsushi Watanabe, Norio Teramae, Young-Kwon Park, Seung-Woon Myung
Analysis of a residual solvent in polymeric materials has become an important issue due to the increased regulations and standards for its use. N-Methyl-2-pyrrolidone (NMP) is a solvent widely used in many industries and restricted as one of the chemicals under EU REACH regulations due to its potential harmful effects. In this study, thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) is applied for the quantitative analysis of NMP with the use of a polymer-coated sample cup. By using the polymer-coated sample cup, the vaporization of NMP was prevented during waiting time before TD-GC/MS analysis...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690259/determination-of-the-electrostatic-potential-of-oil-in-water-emulsion-droplets-by-combined-use-of-two-membrane-potential-sensitive-dyes
#10
Tomoya Iwata, Hirohisa Nagatani, Toshiyuki Osakai
The fluorescence behaviors of potential-sensitive dyes including anionic DiBAC4(3) (denoted by dye A), DiSBAC2(3) (dye B), and zwitterionic di-4-ANEPPS (dye C) were studied in oil-in-water (O/W) emulsions. In this study, the equilibrium Galvani potential difference (ΔO(W)φeq) of the O/W-emulsion droplets was controlled by changing the ratio of the concentrations of electrolytes added to the O (=1,2-dichloroethane) and W phases. When using an adequate combination of the dyes, i.e., B and C, we could observe that the ratio of their fluorescence peak intensities was changed from 1...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690258/a-practical-application-of-solid-phase-extraction-using-a-syringe-filled-with-sorbent-for-the-determination-of-lead-and-cadmium-in-water
#11
Nil Ozbek, Gulcin Torunoglu Turan, Bahire Filiz Senkal, Suleyman Akman
In this study, at first the synthesis of 3-chloro-2-hydroxypropyl methacrylate-ethylene glycole dimethacrylate co-polymer beads and its modification with tris(2-aminoethyl) amine is described. Characterization of the polymer was done by FTIR and SEM. The functional co-polymer was filled in a disposable pipet tip and tightly connected to a 50-mL syringe for the separation and the enrichment of lead and cadmium prior to their determination by flame atomic absorption spectrometry. The sample and then the eluate were subsequently drawn and discharged to retain and desorb lead and cadmium by means of the syringe, respectively...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690257/anodic-stripping-voltammetry-for-the-determination-of-trace-cr-vi-with-graphite-styrene-acrylonitrile-copolymer-composite-electrodes
#12
Trisna K Sari, Jiye Jin, Rahmiana Zein, Edison Munaf
A square-wave anodic stripping voltammetry (SWASV) for the determination of trace amounts of hexavalent chromium Cr(VI) at a graphite/styrene-acrylonitrile (Graphite-SAN) copolymer composite electrode is described. This method involves a preconcentration step whereby the trace Cr(VI) was cathodically reduced to Cr(III) on an electrode surface in an acetate buffer (pH 5), followed by an anodic stripping technique with a square-wave voltammetric mode. It has been shown that the analytical sensitivity is significantly improved at the Graphite-SAN copolymer composite electrode in comparison with the conventional glassy carbon electrode, due to the strong interaction between Cr(III) and the nitrile end group of the SAN copolymer...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690256/sensitive-electrochemical-capsaicin-sensor-based-on-a-screen-printed-electrode-modified-with-poly-sodium-4-styrenesulfonate-functionalized-graphite
#13
Yan Wang, Bin-Bin Huang, Wan-Lin Dai, Bin Xu, Tian-Liang Wu, Jia-Ping Ye, Jian-Shan Ye
A sensitive capsaicin sensor was constructed based on a poly(sodium 4-styrenesulfonate) functionalized graphite modified screen printed electrode (PSS-Grp/SPE) in this study. The PSS-Grp and poly(diallyldimethylammonium chloride) functionalized graphite (PDDA-Grp) were easily synthesized by interacting Grp with PSS and PDDA through sonication, and resulted in negative and with positive charges on the surface, respectively. The prepared PSS-Grp and PDDA-Grp were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and ultraviolet and visible spectroscopy (UV-vis)...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690255/rapid-detection-of-diazepam-injection-based-on-surface-enhanced-raman-spectroscopy
#14
Si-Qin-Gao-Wa Han, Lin Bao, Mei-Ling Zhang, Xiang Lin, Wu-Li-Ji Hasi
Diazepam injection was detected based on a droplet surface enhanced Raman spectroscopy (SERS) platform, which overcomes the disadvantages of the poor uniformity and time-consuming sample treatment process of the conventional "drop and dry" detection strategy. The Raman peak positions of diazepam injection were determined and identified, they are mainly located in the 689, 1002, 1170 and 1598 cm(-1), etc. Different concentrations of diazepam injection were detected. It was found that the intensity of 1002 cm(-1) increases linearly with concentration in the range from 0...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690254/mno2-nanosheet-based-fluorescence-sensing-platform-for-sensitive-detection-of-endonuclease
#15
Chao Hu, Xiang Juan Kong, Ru Qin Yu, Ting Ting Chen, Xia Chu
A novel fluorescence sensing platform for ultrasensitive detection of S1 nuclease activity has been constructed based on MnO2 nanosheets and FAM labeled single-stranded DNA (FAM-ssDNA). In this system, MnO2 nanosheets were found to have different adsorbent ability toward ssDNA and mono- or oligonucleotide fragments. FAM-ssDNA could adsorb on MnO2 nanosheets and resulted in significant fluorescence quenching through fluorescence resonance energy transfer (FRET), while mono- or oligonucleotide fragments could not adsorb on MnO2 nanosheets and still retained strong fluorescence emission...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690253/infant-exposure-to-bisphenol-a-can-be-quantitatively-assessed-by-a-simply-improved-high-performance-liquid-chromatography-tandem-mass-spectrometry-method
#16
Heng Wang, Liangpo Liu, Syed Ali Musstjab Akber Shah Eqani, Heqing Shen
To quantitatively measure trace levels of bisphenol A (BPA) in infant urine, a simply improved high-performance liquid chromatography (HPLC)-tandem mass-spectrometry method was developed and validated. In the present work, a ZORBAX SB-C18 column (2.1 × 30 mm, 3.5 μm) was used for trapping and isolating BPA from the HPLC mobile phase. The result showed that the trapping column can provide effective separation from the background BPA to the sample BPA. This method has a limit of detection (LOD) of 0.048 μg/L, spiked recoveries 85...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690252/multivariate-optimization-of-a-functionalized-sba-15-mesoporous-based-solid-phase-extraction-for-u-vi-determination-in-water-samples
#17
Leila Dolatyari, Mohammad Reza Yaftian, Sadegh Rostamnia, Mir Saeed Seyeddorraji
A solid-phase extraction based on a functionalized SBA-15, with the Schiff base ligand, ethylenediaminepropylesalicylaldimine (SBA/EnSA), was developed for the recovery and preconcentration of trace amounts of uranium(VI) in water samples, prior to its determination spectrophotometrically using ArsenazoIII. For optimizing the parameters affecting the adsorption step (pH, adsorbent dose and adsorption time) and those influencing the desorption process (concentration and volume of eluent and desorption time), a statistical technique response surface methodology (RSM) was employed...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690251/reversible-fluorescence-probe-based-on-n-doped-carbon-dots-for-the-determination-of-mercury-ion-and-glutathione-in-waters-and-living-cells
#18
Xiaohan Sun, Shenghong Yang, Mingzhen Guo, Shuang Ma, Mingda Zheng, Jiang He
An "on-off-on" mode was developed for the detection of mercury ion (Hg(2+)) and glutathione (GSH) with high sensitivity and selectivity based on the nitrogen-doped carbon dots (N-CDs) fluorescent probe. The N-CDs were synthesized through microwave treatment of citric acid and diethylenetriamine for 2 min, and exhibited excellent fluorescence properties and high quantum yield (27.7%). The fluorescence intensity of the N-CDs could be significantly quenched by Hg(2+) (turn-off). Upon addition of GSH, the fluorescence intensity of the N-CDs-Hg(2+) system could be recovered clearly (turn-on)...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690250/simultaneous-determination-of-felodipine-and-metoprolol-in-beagle-dog-plasma-by-online-spe-lc-ms-ms-and-its-application-in-a-pharmacokinetic-study
#19
Meiling Chen, Jiezhao Zhou, Le Mei, Fanglin Yu, Xiangyang Xie, Yan Liu, Yang Yang, Ying Li, Xingguo Mei
In order to overcome deficiencies for simultaneously determining felodipine (FDP) and metoprolol (MPL) with low recovery and low sensitivity, a new online SPE coupled with the liquid chromatography-tandem mass spectrometry (SPE-LC-MS/MS) method for the simultaneous quantitative determination of FDP and MPL in beagle dog plasma was established. The SPE extraction of FDP and MPL was performed on a Retain PEP Javelin column (10 × 2.1 mm, 5 μm), while the chromatographic separation was achieved on a ZORBAX SB-C18 (50 × 2...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28690249/paper-based-analytical-devices
#20
Hideaki Hisamoto
No abstract text is available yet for this article.
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
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