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Volume 4, Issue 4
Displaying 1-14 of 14 articles from this issue
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HIROSHI HAMAGUCHI, ROKURO KURODA1955 Volume 4 Issue 4 Pages 207-210
Published: June 05, 1955
Released on J-STAGE: May 07, 2010
JOURNAL FREE ACCESSHeretofore, geochemical studies of trace elements have been made by spectroscopic methods on account of their rapidity and simplicity but they are largely a semi-quantitative determination based on personal observation. Certain internal standard methods previously reported, which have been applied to the simultaneous determination of a number of elements in silicate rocks, such as dlevised by Bray, are rather difficult to be applied in our case as they are, where only a medium type spectrograph is available. Suitable spectral line forms which are convenient for measuring are obtained by the authors by use of a medium sized Adam Hilgar E2 spectrograph with logarithmic sector attached with a plano-convex lens next to the slit. A satisfactory result is obtained for estimation of nickel, cobalt, lead, tin and germanium in silicate rocks. In order to control the fractional distillation of each element to be analysed, sodium chloride previously treated with internal standard (bismuth) to 1/3 the weight of a sample is added as a spectrostroscopic buffer, and a stable arc is obtained. The forgoing elements are estimated simultaneously with fair accuracy of ±1520%.View full abstractDownload PDF (734K) -
MUTSUAKI SHINAGAWA, HIROSHI MATSUO1955 Volume 4 Issue 4 Pages 211-217
Published: June 05, 1955
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSIodobismuthate ion and chlorobismuthate ion are formed to be determined amperometrically with triphenylselenonium chloride as precipitating reagent. As usual the precipitation reaction proceeds so slowly as to be given up titration, but according to the results of examination the 10 equivalents of iodide ion or 0.20.3N of hydrochloric acid is sufficient for making polarographically complete precipitation within 10 minutes after each portion of titrant is added. The average error of the amperometric titration is ± 1%.
A solution of dodecyltrimethylammonium chloride, C12HR25(CH3)3NC1, at the concentration of 10-210-4M/l gives approximately-2. 2 volt (vs. mercury pool) of reduction potential and at that of 0. 1 M/l gives a wave similar to hydrogen wave having the maximum at around-1. 5 volt. The aqueous solution of this reagent is dissociated into [C12H25(CH3)3N]+ and Cl-; accordingly, it can be utilized for precipipitation reaction of metal ions, e. g. Hg (II), Bi (III), Cd (II), Sb (III), Sn (II), Sn (IV), Fe (III), Mn (II), Co (II), Ni (II) z.rd Zn (II), with the use of a suitable complexing agent, also, anions, e. g. Br-3, I-3, ClO-4, IO-4, VO3-4, CrO2-4, Cr2O2-7, MnO2-4, WO2-4 and MnO-4, are reacted to form the precipitate. Polarographic behaviors of dodecyltrimethylammonium chloride against metal ions, e. g. Co (II), Zn (II), Bi (III), Sb(III) and Hg (II), in the above metal ions and their amperometric titration are investigated.View full abstractDownload PDF (1439K) -
Electrochromatography. VIIIMASAFUMI MAKI1955 Volume 4 Issue 4 Pages 217-221
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn connection with preceding report IV [this journal 3, 392(1954)], further investigations on the separation of a series of structurally known cobaltnitroammine complex salts, [Co(NH3)6] Cl3, [Co(NH3)5NO2] Cl2, cis-and trans-[Co(NH3)4(NO2)2]Cl, [Co(NH3)3(NO2)3], [Co(NH3)2(NO2)4]K and [Co(NH3)6]Na3, by electrochromatography is carried out with the following results : (1). The velocity of migration of various complex ions through filter paper is greater as their numbers of electric charge increased. (2). The separation of a mixture of above complex ions is effected with the migration velocity as in the case of their respective single complex ion. (3). The pH of the buffer solution has no great effect on the migration velocity of complex ions. Therefore, it is assumed that the complex ions have no close relation with the adsorption to the filter paper and their hydrolysis as observed in case of usual cations. (4). The migration velocity of an aqueous solution of each complex ion is increased approximaly in direct proportion to its numbers of electric: charge (accordingly, an apparent radius of each complex ion, calculated on basis of Stokes' law, is assumed to be approximately equal) ; however, as the adsorption of the complex ions to the filter paper is increased with an increase in numbers of electric charge and the rate of increase in, migration velocity is somewhat lowered, although it has a general tendency of increased velocity/ cf migration with an increase of numbers of electric charge as shown in (1). (5). The separtion of complex ions carrying an equal numbers of electric charge is effected by selecting a suitable solution to be saturated in filter paper in order to change their mutual degree of dissociation ; for example, the separation of cis-and trans-[Co(NH3)4(NO2)2]Cl is effected byuse of ammonium oxalate.View full abstractDownload PDF (1313K) -
KIYOHARU ISAGAI, NAKAKO TAKESHITA1955 Volume 4 Issue 4 Pages 222-223
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDetermination of various cations is made by use of ethylenediaminetetraacetic acid (ETA). As already reported on the separation of sulfate ion in natural waters with the use of ETA reagent and cation exchange resin, the same method is applied on the separation of chromate ion with the satisfactory result. The sample solution containing chromate ion is treated with the standard barium ion solution in excess for its complete precipitation as barium chromate and the excess barium ion is titrated back with ETA reagent for an indirect estimation of the chromate ion. In case the chromate ion is mixed with other cations, such as iron and copper ions, these cations ar e removed by passing through cation exchanger and the effluent is used for the determination of chromate ion as above. This method gives an excellent result in the estimation of chromium in stainless steel.View full abstractDownload PDF (486K) -
TAKANOBU SHIOKAWA, TOMIHISA KAMBARA, MASUO YAGI1955 Volume 4 Issue 4 Pages 224-230
Published: June 05, 1955
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSA new catalytic reaction of the divalent palladium on the reduction of molybdate with sodium phosphite was found. In this reaction, the velocity of reduction of molybdate is increased enormously in the presence of microquantities of divalent palladium and the molybdenum-blue is developed as the result. Furthermore, an attempt has been made to carry out the micrcdetection and the microdetermination of palladium by the application of the behaviour. According to the experimental results, the detection of palaldium as little as 0. 05γ and the determination of palladium of 411γ, respectively, can be made, by the measurement of the velocity of formation of the molybdenum-blue.
New catalytic reactions of the divalent palladium on the reduction of phospho- and silico-tungstic acids with sodium phosphite were found. In these reactions, the velocity of reduction of phosphoand silico-tungstic acids is increased in the presence of micrcquantities of divalent palladium and the tungsten-blue is developed as the result. Furthermore, an attempt has been made to carry out the microdetermination of palladium by the application of the behaviour.
By the application of catalytic formation of tungsten-blue from ph csph otungstic acid, the detection of palladium as little as 0. 11γ and the determination of 1050γ can be made;similarly, by use of silico-tungstic acid, the detection of palladium as little as 0. 06γ and the determination of 37γ respectivlely, can be made by the measurement of the velocity of formation of the tungsten-blue.View full abstractDownload PDF (1475K) -
HITOSHI KAMADA, SHIGEYUKT TANAKA1955 Volume 4 Issue 4 Pages 231-234
Published: June 05, 1955
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSAn attempt had been made for determination of constituents of a high-boiling fraction of coaltar by use of infrared absorption spectrum and the following results were obtained. 1). Not only rapid and simple determination of anthracene and carbazole at the same time was possible, but also co-existing components, such as phenanthrene, fluorene, acenaphthene and diphenylene oxide, could be estimated simultaneously. The result of standard deviation of estimation of standard mixed samples indicated that the maximum error of each componen was not exceeded over 1. 2%. 2). As the analyses of commercial anthracene cakes indicated that those samples should be handled as a sixcomponent system with the above components, analyses were made and found that the anthracene cakes determined by heretofore known three-component system of anthracene, carbazole and phenmthrene contained a considerable amount of fluorene, acenaphthene and diphenylene oxide. 3). By using infrared absorption spectrum for determination of quality of anthracene and carbazole, impurities in each of them up to about 0. 5% can be detected.View full abstractDownload PDF (826K) -
Determination of Benzoyl Peroxide in Polymethyl Methacrylate. ITSUGIO TAKEUCHI, NARUHITO YOKOUCHI, YUZI TAKAYAMA1955 Volume 4 Issue 4 Pages 234-237
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSSince the amount of residual monomer and peroxide in polymer is said to be an important factor to determine its chemical and physical properties, quantititative estimation of benzoyl peroxide (B. O. P.) as a representative in peroxides is investigated. Selections of a solvent for (supporting) electrolyte are made; also, the estimation of wave height by use of LiC1 or KNO3 as a (supporting) elect rolyte is investigated and a polarlographic estimation of B. P. O. is established. Results of estimation of the residual B. P. O. after heating of the polymer are discussed.View full abstractDownload PDF (801K) -
[in Japanese]1955 Volume 4 Issue 4 Pages 238-240
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
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[in Japanese]1955 Volume 4 Issue 4 Pages 240
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese], [in Japanese]1955 Volume 4 Issue 4 Pages 240a-242
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
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[in Japanese]1955 Volume 4 Issue 4 Pages 242-244
Published: June 05, 1955
Released on J-STAGE: February 16, 2010
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[in Japanese]1955 Volume 4 Issue 4 Pages 245-254
Published: June 05, 1955
Released on J-STAGE: February 16, 2010
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[in Japanese]1955 Volume 4 Issue 4 Pages 254-262
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
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[in Japanese]1955 Volume 4 Issue 4 Pages 263-268
Published: June 05, 1955
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1671K)
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