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Volume 3 (1987)
- Issue 6 Pages 477-
- Issue 5 Pages 385-
- Issue 4 Pages 283-
- Issue 3 Pages 191-
- Issue 2 Pages 95-
- Issue 1 Pages 1-
Volume 3, Issue 2
Displaying 1-21 of 21 articles from this issue
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Masakazu MATSUI, Sorin KIHARA1987 Volume 3 Issue 2 Pages 95-96
Published: 1987
Released on J-STAGE: July 27, 2007
JOURNAL FREE ACCESSDownload PDF (107K) -
Hideyuki NISHIZAWA, Yukako WATANABE, Yoshihiro ABE1987 Volume 3 Issue 2 Pages 97-100
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe efficiencies of a liquid particle chromatography were measured using salicin and phenyl glucoside as samples under different conditions. The factors which had influences on resolution were the rotation of the inner pipe, flow rate of mobile phase and temperature. A little modified system was used in this investigation.View full abstractDownload PDF (196K) -
Shin TSUGE, Yoshiaki MATSUSHIMA, Nobuo WATANABE, Akira SHINTAI, Kazuhi ...1987 Volume 3 Issue 2 Pages 101-107
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSA new fully automated thermal desorption-gas chromatographic(GC) system has been developed. Dynamic trapping of the thermally desorbed volatile organic components from a given solid sample is followed by selective stripping of the desired range fraction into a GC separation column. The functions of two associated electromagnetic valves, three independent heaters, a cooling fan and the temperature programming of the GC-column oven are all controlled by a microcomputer through an electronic interface. With this analytical system, rapid and sensitive determinations of trace organic components can be carried out for various practical samples such as airborne particulates, carbon blacks, medical plaster sheets and cured insulating polymers.View full abstractDownload PDF (437K) -
Two-Photon Ionization Detection of Anthracene Derivatives and Dyes with Tunable Dye Laser ExcitationNariaki SATO, Sunao YAMADA, Teiichiro OGAWA1987 Volume 3 Issue 2 Pages 109-111
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSTunable dye lasers have been successfully applied to the two-photon ionization spectrometry of seven anthracene derivatives and five dyes in hexane. The sensitivity depended on the excitation wavelength as well as the molar absorptivity. Detection limits for anthracene, 2-methylanthracene and 1, 6-diphenylhexatriene were as low as 20pg/ml (1×10-10M). The detectability by the dye laser excitation was compared with that by the nitrogen laser excitation.View full abstractDownload PDF (181K) -
Hideo AKAIWA, Hiroshi KAWAMOTO, Takanori TANAKA1987 Volume 3 Issue 2 Pages 113-116
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe rate-promoting effect of pyridine bases(B) in the extraction of cobalt(II) and nickel(II) with dithizone(H2dz) was found to increase in the order; pyridine<isoquinoline<3-methylpyridine<4-methylpyridine, which agreed with the increasing order of basicities of these bases. Several 2-substituted pyridines also promote the above extraction, even though their rate promoting effects were less remarkable than had been expected from their basicities. In general, the 2-substituted derivative sterically hinders M2+ (M=Co, Ni) from forming MB2+, whereas the stereochemical structure of the derivative favors the formation of five-coordinated M(Hdz)B+ and consequently may contribute to the rate promoted extraction of M2+.View full abstractDownload PDF (237K) -
Effect of Chemical Equilibria on Rate of Solvent Extraction of Iron(III) with TrifluoroacetylacetoneKazuho INABA, Tatsuya SEKINE1987 Volume 3 Issue 2 Pages 117-120
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSRate of solvent extraction of Fe3+ in aqueous perchlorate solutions with trifluoroacetylacetone into carbon tetrachloride is measured. This rate is lower than that of formation of the first complex in the aqueous phase which controls the whole process and the difference between the two rates is very much affected by the chemical equilibria among the complexes in the system. Furthermore, the dependence of the rate on the reagent and hydrogen ions changes by a change in their concentration in the aqueous phase. This is explained in terms that a part of the complexes formed are not extracted and the proportion of the amount of the whole complexes formed to that extracted into the organic phase is not constant.View full abstractDownload PDF (228K) -
Takashi MASADOME, Toshihiko IMATO, Nobuhiko ISHIBASHI1987 Volume 3 Issue 2 Pages 121-124
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe surfactant-selective electrode based on the poly(vinyl chloride) membrane plasticized with o-nitrophenyl octyl ether shows the Nernstian response to anionic surfactants as well as to cationic ones, e.g., the dodecylsulfate ion and the dodecyltrimethyl ammonium ion. The response time of the electrode is in the order of a few seconds. The electrode is highly selective to the dodecylsulfate ion over inorganic anions. The dodecylsulfate ion selective electrode was applied to the successive potentiometric detection of surfactants by high performance liquid chromatography. Four alkylsulfates were successfully detected with the electrode, after being separately eluted with water-methanol mixture through the reversed phase packing column. The electrode was shown to be useful for the determination of critical micelle concentrations of surfactants in the presence of electrolytes.View full abstractDownload PDF (261K) -
Kiyoshi NOMURA, Yusuke UJIHIRA1987 Volume 3 Issue 2 Pages 125-129
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe magnetite-coated iron wire and molybdenum oxide-coated molybdenum wire electrodes, prepared by treating iron and molybdenum wires in an alkaline solution at the boiling temperature and connecting to the gate of the field effect transistor, showed a near-Nernstian behavior in the pH range between 4 to 11 and between 2 to 12, respectively. Whereas the pH response of the magnetite-coated iron wire electrode was affected by halide ions seriously, the molybdenum oxide-coated molybdenum electrode was found to retard the interference of halide ions effectively.View full abstractDownload PDF (280K) -
Norio ICHINOSE, Chiaki SHIMIZU, Ken OKAMOTO, Takuo INUI, Kyoko ADACHI1987 Volume 3 Issue 2 Pages 131-134
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSA new simplified method which utilizes gas chromatography for the determination of dissolved hydrogen sulfide in anoxic seawaters is described. From a water sample taken in a Kitahara bottle, an aliquot was sucked into a syringe containing an acetone solution of hydroxylamine hydrochloride. The hydrogen sulfide in the acetone solution was very stable, and the concentration in the initial sample solution was found to be quantitatively determined by treatment not later than 24h after sampling. Concentrations of dissolved hydrogen sulfide in natural waters ranging from 6 to 1250μmol l-1 (as H2S) were determined rapidly and precisely by the method presented.View full abstractDownload PDF (210K) -
Eisaku SATOH, Kazuhisa YAMAYA, Minoru YOSHIDA1987 Volume 3 Issue 2 Pages 135-139
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSA method for the determination of 5ng-10μg (as Si) of silicate based on the formation of a fluorescent complex among silicate, benzoin and mannitol in a strongly alkaline formamide medium has been established. To reduce the blank value and to improve the reproducibility, sodium dithionite is added as a reducing agent; this prevents the oxidation of benzoin. The silicate in the solution can be determined over a very wide range by the same chemical procedures only by changing the sensitivity range of the spectrofluorimeter. The relative standard deviation of the method at a level of 0.5μg Si is 2.7%. Phosphate and arsenate can be tolerated up to 4000-fold amounts.View full abstractDownload PDF (292K) -
Yoshifumi AKAMA, Kenji SATO, Toshio NAKAI, Masatugu KAJITANI, Shigetak ...1987 Volume 3 Issue 2 Pages 141-144
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSExtraction of calcium(II) and strontium(II) with a mixture of 1-phenyl-3-methyl-4-stearoyl-5-pyrazolone and TOPO in benzene is described. Calcium(II) and strontium(II) are extracted from a citrate medium at pH 9. Strontium(II) is back-extracted from the benzene phase with a citrate solution adjusted to pH 7, and then the amount was determined by atomic absorption spectrometry. This method can be used for the determination of strontium(II) in solar salt samples.View full abstractDownload PDF (201K) -
Yasuo IIDA, Kazuo GOTO, Hisashi MORIKAWA, Toshio ISHIZUKA1987 Volume 3 Issue 2 Pages 145-150
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe Nd contents of bastonaesite concentrates were determined by photoacoustic spectrometry without dissolution or separation. The bastonaesite concentrates were suitably modeled with a Nd carbonate-La carbonate system. To deal with the light scattering samples, a Kubelka-Munku type calibration method was modified, and the linear relationship between Nd content and the response function was obtained up to 20%(wt/wt) of Nd. The effect of particle size was relatively small under 325 mesh. The effect of impurities on the fluorecence process was also discussed.View full abstractDownload PDF (359K) -
Akio YUCHI, Tomoaki OKUBO, Hiroko WADA, Genkichi NAKAGAWA1987 Volume 3 Issue 2 Pages 151-155
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe complexation equilibria of cadmium ion(M) with Xylenol Orange(H6L) were studied by potentiometry with a cadmium ion selective electrode. The stability constants for MH3L, MH2L, MHL, ML, M2HL and M2L were obtained. These constants were consistent with the results of potentiometry with only a glass electrode and with those of spectrophotometry. The structure of each species is discussed.View full abstractDownload PDF (266K) -
Yoshiko ARIKAWA, Akira SASAKI1987 Volume 3 Issue 2 Pages 157-160
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSA method to extract sulfur completely from biological samples was investigated to assist the isotopic measurement of biosulfur. A sample is burnt under a high pressure of oxygen. The sulfur trioxide formed is absorbed in water to fix it as barium sulfate, which in turn is heated with tin(II)-strong phosphoric acid (the reagent made by dissolving tin(II) chloride dihydrate in condensed orthophosphoric acid). The hydrogen sulfide formed by this procedure is further transformed into silver sulfide. The isotopic ratio is obtained in terms of δ34S‰ according to the conventional method, i.e., combustion of silver sulfide with copper(I) oxide, successive vacuum distillation of formed sulfur dioxide, and measurement of its isotopic ratio by a mass spectrometer. The whole procedure was carefully examined at each stage by repeated analyses of cystine and methionine as sulfur-containing samples. Preliminary applications to measure the isotopic composition of sulfur in nail and hair samples were attempted.View full abstractDownload PDF (238K) -
Takahiro KUMAMARU, Katsunori MURAKAMI, Fumio NAKATA, Hiroshi SUNAHARA, ...1987 Volume 3 Issue 2 Pages 161-165
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSThe rate-promoting effect of pyridine bases(B) in the extraction of cobalt(II) and nickel(II) with dithizone(H2dz) was found to increase in the order; pyridine<isoquinoline<3-methylpyridine<4-methylpyridine, which agreed with the increasing order of basicities of these bases. Several 2-substituted pyridines also promote the above extraction, even though their rate promoting effects were less remarkable than had been expected from their basicities. In general, the 2-substituted derivative sterically hinders M2+ (M=Co, Ni) from forming MB2+, whereas the stereochemical structure of the derivative favors the formation of five-coordinated M(Hdz)B+ and consequently may contribute to the rate promoted extraction of M2+.View full abstractDownload PDF (286K) -
Kuniko AKAMA, Tohru TOBITA1987 Volume 3 Issue 2 Pages 167-170
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSCarboxypeptidases A and B and chymotrypsin C from autolyzed porcine pancreas glands were simultaneously purified by extraction of acetone powder with water, ammonium sulfate precipitation, and chromatography on DEAE-cellulose. Then carboxypeptidases A and B were freed from contaminated endopeptidase such as elastase and chymotrypsin C by affinity chromatography on D-phenylalanine-CH-Sepharose 4B and D-arginine-CH-Sepharose 4B, respectively. Chymotrypsin C was freed from carboxypeptidases A and B by passage through D-phenylalanine-CH-Sepharose 4B. These carboxypeptidases A and B can be used for carboxyl-terminal analysis of peptides without prior treatment with diisopropyl phosphorofluoridate to inactivate contaminated pancreatic endopeptidases.View full abstractDownload PDF (264K) -
Yutaka SAITO, Masaki MIFUNE, Suzuyo NAKASHIMA, Junichi ODO, Yoshimasa ...1987 Volume 3 Issue 2 Pages 171-174
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSAn anion-exchange resin, Amberlite IRA 900 modified with manganese-tetrakis(sulfophenyl)porphine (MnTPPSr), was used in place of peroxidase for the determination of hydrogen peroxide by the following enzyme-re-action: 2H2O2+phenol+4-aminoantipyrine →<peroxidase> quinoid dye(λmpx=505nm)+4H2O. The calibration curve was linear in the range from 5μg to 50μg of hydrogen peroxide with a relative standard deviation of 1.05% (n=10).The absorbance of the quinoid dye formed by the use of Mn-TPPSr reached approximately 80% of that obtained by the control peroxidase method. The activity of MnTPPSr did not deteriorate over repeated uses.Only slight interferences of foreign substances were found except for the case of ascorbic acid.View full abstractDownload PDF (204K) -
Noriko NAKAMURA, Fumio IINUMA, Toshio KINOSHITA1987 Volume 3 Issue 2 Pages 175-177
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSHeparin was found to enhance the fluorescence of dansylprotamine. This finding was applied to microdeter- mination of the sulfated polysaccharides. The standard curves for heparin, cellulose sulfate and dextran sulfate were linear in the range of final concentration of 0.5 to 10.0μg/ml. Sulfated polysaccharides and dansylprotamine were found to bind each other through both electrostatic and hydrophobic interactions.View full abstractDownload PDF (156K) -
Kunio NAGASHIMA, Xue-xin QIAN, Shigetaka SUZUKI1987 Volume 3 Issue 2 Pages 179-180
Published: 1987
Released on J-STAGE: July 27, 2007
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Kazuhide UCHIDA, Daisuke YOSHIZAWA, Masako TOMODA, Shin-ichi SAITO1987 Volume 3 Issue 2 Pages 181-183
Published: 1987
Released on J-STAGE: July 27, 2007
JOURNAL FREE ACCESSDownload PDF (134K) -
Akira MIYAZAKI, Hiroaki TAO, Akira KIMURA, Kenji BANSHO1987 Volume 3 Issue 2 Pages 185-187
Published: April 10, 1987
Released on J-STAGE: June 27, 2006
JOURNAL FREE ACCESSDownload PDF (140K)
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