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Herbert A. LAITINEN
1985 年 1 巻 1 号 p.
1b-2
発行日: 1985年
公開日: 2007/07/27
ジャーナル
フリー
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Toyozo UNO
1985 年 1 巻 1 号 p.
1
発行日: 1985年
公開日: 2007/07/27
ジャーナル
フリー
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A New Tool for Structural Analysis
Bernd M. RODE
1985 年 1 巻 1 号 p.
2-3
発行日: 1985年
公開日: 2007/07/27
ジャーナル
フリー
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A Statistical Evaluation of a Survey Done by the Working Party on Analytical Chemistry (WPAC) of the Federation of European Chemical Societies (FECS) in the period 1983/84
E. PUNGOR, W. MALISSA, R. KELLNER
1985 年 1 巻 1 号 p.
3-4
発行日: 1985年
公開日: 2007/07/27
ジャーナル
フリー
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Akinori UEJIMA, Yoshinori SUGITANI, Kozo NAGASHIMA
1985 年 1 巻 1 号 p.
5-8
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
The absorption spectra of some thin layers in a color reversal film were separately measured non-destructively by the method of correlation photoacoustics. Each layer measured was several micrometers thick except the substrate layer, showing that the thickness resolution attained in this experiment was approximately one order of magnitude improved than that obtained for the natural leaves.
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Fujio MORISHITA, Takashi UEDA, Yushi TERASHIMA, Tsugio KOJIMA
1985 年 1 巻 1 号 p.
9-12
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
The relationship between the molecular structure of brominated alkanes and their retention index (I) in gas chromatography is discussed. The I for a given monobromide can be predicted by considering the increment of I by a bromine atom and the correction values for the hindrance effect through alkyl chains. On the other hand, the calculation of the I for dibromides requires introduction of the additional increment, which is determined by the positional relationship between two bromine atoms in the same molecule. The I for halides possessing both chlorine and bromine atoms may be calculated by use of the average values of the positional increments for Cl-Cl and Br-Br.
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Yoshinori KOBAYASHI, Akira KAWASE, Akira UCHIUMI, Susumu NAKAMURA, Mas ...
1985 年 1 巻 1 号 p.
13-17
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
An energy-dispersive system is described for element mapping by X-ray fluorescence spectrometry. Unlike Gruker′s tomographic system, a point-shaped beam from an X-ray tube is used for direct mapping. Typical spatial resolution of the system is about 260μm. Element maps obtained for damaged leaves and animal livers demonstrate possible applications to biological problems.
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Akio YUCHI, Hiroko WADA, Genkichi NAKAGAWA
1985 年 1 巻 1 号 p.
19-22
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
The potential response of copper(II), lead and cadmium ion-selective electrodes was studied in ligand buffers which contain a complex ML(M:Cu
2+, Pb
2+ or Cd
2+), a ligand L and an excess of a second metal N. By measuring [M] with the ion-selective electrode, the ratio of the stability constants,
KML/
KNL was determined. The effects of pH, the second metal ion N and the ratio of [N]/[NL] on the electrode response were studied in detail. The
KML/
KNL values obtained for EDTA were in good agreement with those calculated from
KML and
KNL in the literature. The stability constants of
N-hydroxyethylenediamine-
N,
N′,
N′-triacetate complexes were determined successfully. These logarithmic values of K
NL were found: Pb
2+, 15.59; Zn
2+, 14.59; Co
2+, 14.49; Cd
2+, 14.24; Mn
2+, 11.41. These results show that the method is very useful for the determination of the stability constants of complexes with metal ions for which suitable ion-selective electrodes are not available.
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Shizuo FUJIWARA, Yuko NISHIMOTO, Fumihiro ARAKAWA
1985 年 1 巻 1 号 p.
23-27
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Fluctuation of the refractive index in aqueous electrolyte solutions has been measured for the purpose to see its concern with the internal structure of the solution. It is found that the fluctuation is anomalously enhanced at specific concentration with the copresence of oxygen. When oxygen is removed, enhancement does not occur. The results observed suggest the presence of a critical concentration which divides the structure of the solution into two phases: in one, the bulk solvent molecules are dominant, and in the other, the solvated ones are dominant. It is assumed that oxygen plays a catalytic function for the enhancement of the thermal flow in and out of the solution. The critical concentration for the sodium chloride solution was determined to be ca. 0.4-0.5mol/l, which almost coincides with the concentration of salt in sea water. Significance of the present finding in nature will be discussed as well as the usefulness of the measurements of fluctuation in analytical chemistry.
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Jumras P. LIMTRAKUL, Shizuo FUJIWARA, Bernd M. RODE
1985 年 1 巻 1 号 p.
29-32
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Monte Carlo simulations, based on the MCY model, have been performed for 0.55, 3.35 and 6.1mol/l aqueous sodium chloride solutions. The results have been used for an analysis of the percentual contribution of structural subunits to the average composition of the solution and the angular distribution of solvent molecules in first coordination shells. The concentration dependence of the solution structure has been studied as well as the formation of ion pairs at higher salt concentrations.
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Takeo KATAMI, Tomokuni HAYAKAWA, Masamichi FURUKAWA, Shozo SHIBATA
1985 年 1 巻 1 号 p.
33-36
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
An extraction-Spectrophotometric method for the determination of trace amounts of nickel based on its extraction into chloroform with 2-(2-benzothiazolylazo)-5-dimethylaminobenzoic acid has been developed. The reagent is very sensitive and reacts with nickel(II) to form a stable blue 1:2(Ni:reagent) complex that can be extracted into chloroform. The apparent molar absorptivity of the nickel(II) complex was 1.17×10
5dm
3 mol
-1 cm
-1 at 635nm in chloroform. The reagent is relatively selective for nickel(II): interference from iron can be removed with cupferron and other interfering ions can be masked with Tiron. Therefore, almost all metal ions except cobalt(II) do not interfere. Microgram amounts of nickel in steel and residual fuel oil have been determined satisfactorily.
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Keiko YOKOFUJITA, Yuko ISHII, Kazuyoshi TAKIYAMA
1985 年 1 巻 1 号 p.
37-39
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Ammonium carbonate solution was added into a solution of calcium and barium maintained at 90°C, and a carbonate precipitate was produced. Co-precipitation of calcium carbonate and barium carbonate was investigated analytically. The calcium and barium carbonates produced at high temperature were both composed of rod-shaped particles and their crystals belonged to the orthorhombic system. The co-precipitated particles of calcium and barium carbonates were generally composed of two kinds of crystals: a spindle-shaped crystal and a cubic-like plate crystal. The spindle-shaped and cubic-like crystals were both solid solutions of calcium and barium carbonates. The precipitate produced in an equimolecular solution of calcium and barium was composed of only cubic-like plate crystals. These belonged to the orthorhombic system; their lattice constants were estimated to be a
0=5.06, b
0=8.80 and c
0=6.24. The lattice constants of these spindle-shaped and cubic-like crystals were estimated on the assumption that all the crystals belonged to the orthorhombic system.
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Shigeru KAWAMORITA, Hiroto WATANABE, Kensaku HARAGUCHI
1985 年 1 巻 1 号 p.
41-45
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Distribution equilibria of 2-(2-pyridylazo)-5-methylphenol (PAP-5-Me) and its zinc(II) chelate have been studied between two phases which were formed from a micellar solution of poly(oxyethylene)-4-nonylphenyl ether with 7.5 oxyethylene units (PONPE-7.5). One phase was rich in PONPE-7.5 and the other was the aqueous phase. The volume ratio of the former to the latter was about 0.6:49.5 under the present conditions. On the basis of the distribution curves for PAP-5-Me and zinc(II) as a function of pH, the acid dissociation constant of PAP-5-Me, the formation constasnt of the chelate, and the partition constants of PAP-5-Me and the chelate were determined at 293K and ionic strength of 0.1(NaCl).
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Manabu YAMAMOTO, Katsutoshi FUJISHIGE, Hiroyuki TSUBOTA, Yuroku YAMAMO ...
1985 年 1 巻 1 号 p.
47-50
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
A simple digestion procedure with potassium persulfate in alkaline medium is described for the determination of the total concentration of arsenic species in sea water. Combined with the previously proposed method for the differential determination of As(III) and As(V) by hydride generation-atomic absorption spectrometry, arsenic species in sea water were determined as As(III), As(V) and organoarsenic species. Sub ppb level of arsenic in sea water could be detected with a sample volume of 100ml. In sea water samples of the Japan Sea and the northwestern North Pacific Ocean, an average of total concentrations of arsenic was found to be about 2.0μg l
-1 irrespective of locality. Total concentrations were rather constant from surface to deep water. As(III) and organic species were found only in surface water and the concentration of As(V) was about 0.2 to 0.3μg l
-1 lower in the surface water than in the deep water.
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Kenjiro HAYASHI, Yoshiaki SASAKI, Shoji TAGASHIRA, Miyuki NAKASHIMA
1985 年 1 巻 1 号 p.
51-54
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Nickel(II) of 0.04-1.4mmol dm
-3 and palladium(II) of 1-32μmol dm
-3 were extracted quantitatively into chloroform from the aqueous phases containing 0.2mol dm
-3 and 2mmol dm
-3O, O′-diethyldithiophosphate(dtp
-) at pH 1-7 and 1-13, and determined at 385nm (ε=8.4×10
2mol
-1 dm
3 cm
-1) and 298nm (ε=2.9×10
4mol
-1 dm
3 cm
-1), respectively. The determination of nickel was affected with many diverse ions, but that of palladium was hardly affected with them except copper(II), tin(II), antimony(III), silver(I), mercury(II), gold(III), osmium(VIII), and nitrite ion by using 10mmol dm
-3 EDTA as a masking agent. The extracted species of nickel(II) and palladium(II) were [Ni(dtp)
2] and [Pd(dtp)
2], respectively. The stability and distribution constants for the nickel(II) complex were determined as 1.3×10 (mol dm
-3)
-2 and 1.0×10
3, respectively. The palladium(II) complex was, however, too stable to determine the constants.
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Shigeo UMETANI, Masakazu MATSUI, Hiroaki KAWANO, Toyoshi NAGAI
1985 年 1 巻 1 号 p.
55-58
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
The synergistic extraction of such divalent metals as zinc and cadmium with the mixture of 4-benzoyl-3-methyl-1- phenyl-5-pyrazolone(HPMBP or HA) and quaternary ammonium salt (QCl) was investigated as a function of pH, HPMBP and QCl. Highly enhanced extraction was observed in the extraction system. The possible extracted species were ZnA
2(AQ)
2 and CdA
2(AQ) when QCl was capriquat (trioctylmethylammonium chloride). Extraction constants and equilibrium constants in the organic phase were calculated. Similar enhanced extractions were also observed when QCl was a water-soluble quaternary ammonium salt, zephiramine (tetradecyldimethyl- benzylammonium chloride).
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Masaaki KAI, Kazuhiko TAMURA, Masatoshi YAMAGUCHI, Yosuke OHKURA
1985 年 1 巻 1 号 p.
59-63
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Aromatic amidines such as 4-methoxybenzamidine, benzamidine, 3, 4-dimethoxybenzamidine, 2-amidinonaphthalene and 4-amidinopyridine give fluorescences when reducing carbonhydrates are heated in an alkaline medium with these amidines for a few minutes. Of the amidines tested, 4-methoxybenzamidine and benzamidine are favorable fluorogenic reagents for reducing carbohydrates. Both the aromatic amidines permit the fluorometric determination of reducing carbohydrates with rapid and simple procedure; reducing carbohydrates tested can be determined at concentrations as low as 0.06-2.25nmol ml-1 and 0.09-2.40nmol ml-1 by the methods with 4-methoxybenzamidine and benzamidine, respectively.
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Yohji HAYASHI, Kiyoshi ZAITSU, Yosuke OHKURA
1985 年 1 巻 1 号 p.
65-68
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
A highly sensitive, rapid and precise method for the determination of hydrogen peroxide is described which employs flow injection analysis with fluorescence detection. Hydrogen peroxide solution is injected into a water stream, mixed with a solution of 3-(
p-hydroxyphenyl)propionic acid, a fluorogenic substrate for horseradish peroxidase. The mixture is then passed through an immobilized horseradish peroxidase column prepared by coupling of the periodate-treated enzyme with aminopropyl glass beads. The fluorescent product in the stream is monitored with a conventional fluorimeter. A sampling rate of 120/h can be attained. The detection limit is 0.5pmol in a 20-μl injection volume. The immobilized enzyme column can be used for a year or longer without loss of the activity.
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Megumi KASHIWAMURA, Toshiaki MIURA, Michiya KIMURA
1985 年 1 巻 1 号 p.
69-72
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
A simple and specific fluorometric method for the determination of serum argininosuccinic acid(ASA) was developed. The method is based on the enzymatic conversion of ASA to arginine with argininosuccinate lyase, followed by the specific fluorometric determination of arginine using 2, 3-naphthalenedicarbaldehyde. A linear calibration curve was obtained over the concentration range of 0.4-50.0nmol ASA in 100μl of sample, with a coefficient of variation of 3.2% (n=6) at 10.0nmol. This method was applicable to the determination of serum ASA with no separation step except for deproteinization. The recovery of ASA added to sera was found to be 103%, with a coefficient of variation of 3.9% (n=8). The results obtained by this method indicated that ASA was almost undetectable in sera of normal men.
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Jun HAGINAKA, Junko WAKAI, Hiroyuki YASUDA, Toyozo UNO
1985 年 1 巻 1 号 p.
73-76
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
A simple and rapid spectrophotometric method for the determination of penicillins has been developed. The method is based on the measurement of ultraviolet absorbance at 323-346nm of reaction products with 1-2M 1, 2, 4-triazole and|1×10
−3M mercury(II) chloride in solution (pH 9.0) for 10min at 60°C. The method, which permits detection of concentrations of penicillins down to 0.1μg/ml, is accurate and precise. The assay of amino-penicillins was interfered with the coexistence of the corresponding penicilloic acids, while the method is specific to other intact penicillins without interference of the corresponding penicilloic acids.
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Masaki TACHIBANA, Motohisa FURUSAWA
1985 年 1 巻 1 号 p.
77-80
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
Trace amounts of anthracene can be separated from fluoranthene and most of the concomitant impurities by a zone-melting technique using dibenzofuran as a zone-melting medium. Anthracene thus separated can be determined by synchronous fluorescence spectrometry without removal of dibenzofuran. The determination limit is 2ppm. After 100mg of a fluoranthene sample and 4g of purified dibenzofuran had been uniformly mixed, the mixture was charged in a glass tube with an i.d, of 4mm. The zone-pass was repeated 20 times with an upward travel at a speed of 100mm/h under constant stirring. The lower half of the zone-molten ingot was cut out exactly and dissolved in xylene. Anthracene could be determined from the synchronous fluorescence intensity at 384nm.
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Kazunori KOBAYASHI, Yumi AKIYAMA, Kayo KAWAGUCHI, Shinzo TANABE, Toshi ...
1985 年 1 巻 1 号 p.
81-84
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
A sensitive and specific method for the determination of
N-acetylneuraminic acid and
N-glycolylneuraminic acid was developed by using high performance liquid chromatography with fluorometric detection. Both neuraminic acids were derivatized with 4′-hydrazino-2-stilbazole, a fluorogenic reagent for α-keto acid. The derivatives were separated by reversed phase chromatography on a Radial PAK Cartridge C
18 Column (Waters) with methanol-aqueous 1.5% triethylamine solution adjusted the pH to 2.3 with phosphoric acid (35:65 v/v) as a mobile phase at a flow rate of 1ml/min. The detection limits of both derivatives were 0.5ng in an injection volume of 5μl. This method was applied to the determination of NANA in human blood and urine.
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Kiyoshi HASEBE, Teiji KAKIZAKI, Hitoshi YOSHIDA
1985 年 1 巻 1 号 p.
85-86
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
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Etienne ROTH
1985 年 1 巻 1 号 p.
87
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
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Masatake OHNISHI, Keitaro HIROMI
1985 年 1 巻 1 号 p.
89-90
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
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Shigetoshi AMIYA, Masao UETSUKI
1985 年 1 巻 1 号 p.
91-92
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
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Isamu TAGUCHI
1985 年 1 巻 1 号 p.
93-94
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー
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Kuniaki NAGAYAMA
1985 年 1 巻 1 号 p.
95-96
発行日: 1985年
公開日: 2006/06/13
ジャーナル
フリー