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Journal Articles

Highly sensitive detection of sodium in aqueous solutions using laser-induced breakdown spectroscopy with liquid sheet jets

Nakanishi, Ryuzo; Oba, Hironori; Saeki, Morihisa; Wakaida, Ikuo; Tanabe, Rie*; Ito, Yoshiro*

Optics Express (Internet), 29(4), p.5205 - 5212, 2021/02

 Times Cited Count:0 Percentile:0(Optics)

Laser-induced breakdown spectroscopy (LIBS) combined with liquid jets was applied to the detection of trace sodium (Na) in aqueous solutions. The sensitivities of two types of liquid jets were compared: a liquid cylindrical jet with a diameter of 500 $$mu$$m and a liquid sheet jet with a thickness of 20 $$mu$$m. Compared with the cylindrical jet, the liquid sheet jet effectively reduced the splash from the laser-irradiated surface and produced long-lived luminous plasma. The limit of detection (LOD) of Na was determined to be 0.57 $$mu$$g/L for the sheet jet and 10.5 $$mu$$g/L for the cylindrical jet. The LOD obtained for the sheet jet was comparable to those obtained for commercially available inductively coupled plasma emission spectrometers.

Journal Articles

Thermal behavior, structure, dynamic properties of aqueous glycine solutions confined in mesoporous silica MCM-41 investigated by X-ray diffraction and quasi-elastic neutron scattering

Yoshida, Koji*; Inoue, Takuya*; Torigoe, Motokatsu*; Yamada, Takeshi*; Shibata, Kaoru; Yamaguchi, Toshio*

Journal of Chemical Physics, 149(12), p.124502_1 - 124502_10, 2018/09

 Times Cited Count:2 Percentile:13.74(Chemistry, Physical)

Differential scanning calorimetry, X-ray diffraction, and quasi-elastic neutron scattering (QENS) measurements of aqueous glycine solutions confined in mesoporous silica (MCM-41) were performed at different glycine concentrations, pH, and loading ratio (= mass of glycine solution / mass of dry MCM-41) in the temperature range from 305 to 180 K to discuss the confinement effect on the thermal behavior, the structure, and the dynamic properties of the solutions.

Journal Articles

Role of van der Waals corrections in first principles simulations of alkali metal ions in aqueous solutions

Ikeda, Takashi; Boero, M.*

Journal of Chemical Physics, 143(19), p.194510_1 - 194510_7, 2015/11

 Times Cited Count:22 Percentile:76.17(Chemistry, Physical)

By resorting to a novel implementation of the first-principles-based van der Waals correction based on maximally localized Wannier functions, we inspect its performance and assess its reliability for aqueous solutions of alkali metal ions. We find that van der Waals interactions, when added to the widely used revPBE gradient corrected functional, influence substantially both structural and dynamical properties of water molecules, with particular emphasis on the hydration shell of the alkali cations. These effects are more evident for strong structure-making and -breaking cationic species. Moreover, self-diffusion coefficients and reorientation correlation times of solvating water molecules change systematically, showing a trend in better agreement with experiments with respect to simulations neglecting the long-range dispersion contributions.

Journal Articles

The Radiolysis anthraquinone dye in aqueous solutions

; *; Hotta, Hiroshi;

Bulletin of the Chemical Society of Japan, 49(3), p.600 - 605, 1976/03

 Times Cited Count:23

no abstracts in English

Journal Articles

The H/D isotope effect in the conversion of the electron into a hydrogen atom in aqueous acid solutions at 300 and 77$$^{circ}$$K

Ono, Shinichi

Bulletin of the Chemical Society of Japan, 41(6), p.1301 - 1307, 1968/00

 Times Cited Count:13

no abstracts in English

Journal Articles

Oxidation of ferrous ions in aqueous solutions by cobalt-60 gamma rays, 3; The Effect cupric ion in air-free acidic solutions

Hotta, Hiroshi; Ono, Shinichi;

Bulletin of the Chemical Society of Japan, 35(5), p.762 - 765, 1962/00

 Times Cited Count:2

no abstracts in English

Journal Articles

Oxidation of ferrous ions in aqueous solutions by cobalt-60 gamma rays, 2; Effect of anions at high dose

Hotta, Hiroshi; Ono, Shinichi

Bulletin of the Chemical Society of Japan, 34(11), p.1640 - 1644, 1961/00

 Times Cited Count:6

no abstracts in English

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