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Volume 3 (1954)
- Issue 6 Pages 467-
- Issue 5 Pages 389-
- Issue 4 Pages 291-
- Issue 3 Pages 195-
- Issue 2 Pages 93-
- Issue 1 Pages 3-
Volume 3, Issue 2
Displaying 1-23 of 23 articles from this issue
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MASAMI SUZUKI1954 Volume 3 Issue 2 Pages 93-96
Published: April 15, 1954
Released on J-STAGE: May 25, 2010
JOURNAL FREE ACCESSZinc plate to be used for dry electrical cells is treated by adding a small amounts of magnesium for its easy workability; however, larger addition of it is said to cause the shortening of the life of the cell. The author investigated on a simple photo-metric method to obtain the following result. In this method, the sample is decomposed with acid, treated with sodium hydroxide solution in large excess in order to precipitate the magnesium with iron hydroxide, and a small amount of lead remaining in the precipitate is separated with iron hydroxide by making it ammonia alkaline. The solution containing magnesium and copper is treated with potassium cyanide and oxin solutions to precipitate the magnesium with oxin. The precipitate is dissolved in acid, treated with sulfanilic acid and sodium nitrite, made alkaline with sodi um hydroxide, the oxin is converted into azo dye and the concentration of its orange red color is determined by use of electrophotometer. The conditions for development of azo dye are investigated and found that the reaction in sodium hydroxide at the concentration of 0.20.3N is the best.View full abstractDownload PDF (908K) -
MASAYOSHI ISHIBASHI, TAITIRO FUJINAGA1954 Volume 3 Issue 2 Pages 96-98
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
JOURNAL FREE ACCESSIn the preceeding paper (this journal 2, 345 (1953)) these authors described an apparatus of regulating circuit consisting of galvanometer switch-amplifier-electromagnetic relay-reversible motor, which used direct current as an electrolysis source. In the present paper, a new sensitive potentiostat employing galvano-meter switch-A. C. amplifier-reversible motor is described and also some results of using it are given. This instrument is completely line-operated from 110 volts alternating current source except one 1.5 volts dry battery as a supplement for cathode potential; no regulation is necessary before use and the potential of working electrode is kept automatically definite during the electrolysis. The working capacity for electrolysis is 30V and 3A, and the sensitivity to the change in electrolysis is about ±7 mV.View full abstractDownload PDF (682K) -
KEIICHIRO FUWA1954 Volume 3 Issue 2 Pages 98-104
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
JOURNAL FREE ACCESSIn the separation of fluorine by distillation as fluosilicic acid, the separation is effected by dropping water through a separatory funnel while the air is passed in order to prevent sudden boiling. Colorimetric methods of zirconium-alizarin and aluminium-hematoxylin methds are investigated, and an improved method together with the preparation of reagents and using of photometer is given. A few examples of analysis of natural waters by use of the above method are given.View full abstractDownload PDF (1490K) -
EIITI MINAMI, NAGAO IKEDA, TATSUJIRO ISHIMORI1954 Volume 3 Issue 2 Pages 105-107
Published: April 15, 1954
Released on J-STAGE: January 14, 2010
JOURNAL FREE ACCESSSimple methods of detection of arsenic sulfides, such as found in the precipitate of hot spring, are investigated; samples containing large amount of sulfur, such as flower of sulfur, are taken for finding the methods to be carried out in field test in a short time.
The following three methods gave satisfactory results.
(1) Heating of acidified silver nitrate solution and sample gives black coloration in the presence of arsenic and the presence of sulfur does not interfere the coloration. (2) Arsenic sulfide is reprecipitated by treating the sample with ammonia and nitric acid, and the coloration with silver nitrate solution is applied for an approximate estimation of arsenic in samples containing comparatively large amount of arsenic.
(3) Detection of arsenic by the formation of silver arsenate. All of the above three methods are suitable for field test in a short time, among which (1) gives the highest sensitivity, (2) is possible for estimation of approximate content, and (3) is suitable for directive detection of arsenic; the combined use of these three methods is necessary in some cases to give effective result.View full abstractDownload PDF (693K) -
HIDEYA INABA1954 Volume 3 Issue 2 Pages 107-114
Published: April 15, 1954
Released on J-STAGE: January 14, 2010
JOURNAL FREE ACCESSResults of quantitative estimation of dicyandiamide in calcium cyanamide by various methods do not always give agreement and there are considerable variation. Furthermore, these methods require a considerable time and there are many difficulties in their practical application. The present report deals with the studies on the effects of the amount of sample used, concentration of reagents, presence of impurities, and pH at the time of precipitation temperature and tiltrating condition in Harger method or "silver picrate method" with the result that this method is inaccurate in the presence of impurities, e. g. melamine and guanidine; a suitable method to be applicable in such a case is established with higher accuracy and rapidity in comparison with heretofore known methods. A preliminary report on the corrected values of sulubilities is given.
An improved Harger method described in the first report gave accuracy and rapidity. However, the method was not ideal in point of rapidity and further studies revealed that a satisfactory result was obtained by application of the formation of guanylurea nitrate from reaction of nitric acid. The method is to add a certain amount of nitric acid to an extracted solution of calcium cyanamide, heat the mixture in a sealed container for 15 minutes at 100°C, the excess of nitric acid being estimated by titrating it with sodium hydroxide with an aim of estimations the amount of dicyandiamide from the amount of nitric acid consumed for the reaction. The time required for the reaction is 3 hours including the extraction, it does not require special reagents and its accuracy is ±3% of the content.View full abstractDownload PDF (1522K) -
Polarographic Behaviors of Tetramethylammonium Iodide for Several Kinds of Metal IonMUTSUAKI SHINAGAWA, HIROSHI MATSUO1954 Volume 3 Issue 2 Pages 114-120
Published: April 15, 1954
Released on J-STAGE: January 14, 2010
JOURNAL FREE ACCESSTetramethylammonium iodide, (CH3)4NI, is synthesized and its behaviors on Bi+++, Sb+++, Pb++, and Hg++ are investigated polarographically; the reaction in the presence of iodide ion gives a characteristic red orange precipitate, but no precipitate is formed in the absence of iodide ion. The mechanism of this reaction is considered to be due to the formation of complex anions, e. g. BiI4-, SbI4-, PbI4--, and HgI4-- from reaction of I- in (CH3)4NI with various metal ions, and the precipitate is formed from reaction of these complex anions and tetramethylammonium ion, (CH3)4N+, among which the reaction of the reagent with bismuth complex ion is especially sensitive as a good qualitative reagent since it can be detected within the limit of several tenth γ, while the precipitate with other metal ions have comparatively large solubilities and unsuitable for either qualitative or quantitative reagent. Polarograms of each case are given and discussedView full abstractDownload PDF (1356K) -
YUKICHI YOSHINO1954 Volume 3 Issue 2 Pages 121-125
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
JOURNAL FREE ACCESSCations present with phosphoric acid and arsenic acid are removed by use of cation exchange resin, and the methods of potentiometic titration of phosphoric acid and arsenic acid in the presence of various cations are investigated. The result indicated that the separation of phosphoric acid is interfered by the presence of Fe+++ and Al+++, that with Cr+++ and Cd++ required a certain condition, and the presence of other catins showed no interference for quantitative separa-tion and estimation. Also, the effects of Fe+++ and Al+++ on kinds of resin used and the ratio with phosphoric acid are studied in order to seek the practical limit of allowance of their presence. Similarly, arsenic acid is separated from cations and estimated as in the case of phosphoric acid.View full abstractDownload PDF (1079K) -
TAKIO NAITO, NORIKO TAKAHASHI1954 Volume 3 Issue 2 Pages 125-127
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
JOURNAL FREE ACCESSVarious developing agents are reguired for the confirmation of metal ions separated by paper chromatography. The present report deals with experimental results of using a few new organic reagents which are not used as developing agent heretofore. Using of aceton-hydrochloric acid or butanol-hydrochloric acid as a solvent, and phenylthiosemicarbazide as a developing agent makes possible for detection of Cu++, Cd++, Bi+++, Ni++, Co++, Zn++, Hg++, and Fe3+ all at once. Also, tin metal group separated with glacial acetic acid-nitric acid is developed with thiogallein for detection of Sn4+, Sb3+, Sb5+, As3+ and As5+, and that developed with gallein for detection of Sn4+, Sb3+, and Sb5+. In case of using glacial acetic acid-hydrochloric acid as a solvent thiogallein gives the detection of Sn4+, Sb3+, Sb5+, and As5+, and that with gallein gives Sn4+, Sb3+, and Sb5+.View full abstractDownload PDF (619K) -
TOMOYUKI AKIYAMA1954 Volume 3 Issue 2 Pages 127-131
Published: April 15, 1954
Released on J-STAGE: May 07, 2010
JOURNAL FREE ACCESSThe basic principle is composed of precipitating beryllium salt solution with NH4OH as Be(OH)2, dissolving with HNO3, heating for 30 minutes at 280-300°C with Bé 60° H2SO4 (about 80%) and estimating it as BeSO4 with 0.17-0.25% error. For quantitative estimation of Be in the presence of Fe (III), Al, Ca and Mg, the author removed larger parts of Fe and Al by Rothe's ether method, the remainder of Fe is separated by precipitating it as FeS with H2S in the presence of tartaric acid, the Al is separated as Al (C9H6ON)3 by oxin method, then the Be in the filtrate is estimated as BeSO4; the error in this case was ±0.2%. This method could used as one of the method of obtaining BeSO4 from the last extract after treating raw mineral materials with general method of treatment.
Havens called attention to the fact that an application of a mixture of hydrochloric acid saturated with hydrogen chloride gas and ether on chlorides of berylium and aluminium gives an insoluble AlCl3.6 H2O, while BeCl2. 4H2O remains in the solution, Accoding to the author's investigation, this statement is not absolutely sure. Therefore, a combined use of tannin or oxin method with the above method is investigated and a method of combined use of oxin is taken in this experiment. A good result is obtained by treating the sample solution containing Be, Al, Fe3+, Ca and Mg with NH4Cl and NH4OH to precipitate Be, Al and Fe as hydroxides, filtered, the precipitate is taken up with HCl, the solution is treated with HCl-ether mixture for separation of AlCl3. 6H2O, the filtrate is treated with tartaric acid, H2S and (NH4)2S to separate FeS, the filtrate containing a small amount of Al is removed by precipitating it with oxin, the filtrate is treated with NH4OH to precipitate Be(OH)2 and it is estimated as BeO by usual method.View full abstractDownload PDF (1120K) -
[in Japanese]1954 Volume 3 Issue 2 Pages 132-133
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese]1954 Volume 3 Issue 2 Pages 133a-134
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese]1954 Volume 3 Issue 2 Pages 133
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese], [in Japanese], [in Japanese]1954 Volume 3 Issue 2 Pages 134-135
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese]1954 Volume 3 Issue 2 Pages 135-136
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese], [in Japanese]1954 Volume 3 Issue 2 Pages 136-137
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese]1954 Volume 3 Issue 2 Pages 138-142
Published: April 15, 1954
Released on J-STAGE: January 14, 2010
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[in Japanese], [in Japanese]1954 Volume 3 Issue 2 Pages 143-149
Published: April 15, 1954
Released on J-STAGE: May 25, 2010
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[in Japanese]1954 Volume 3 Issue 2 Pages 150-160
Published: April 15, 1954
Released on J-STAGE: April 28, 2009
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[in Japanese]1954 Volume 3 Issue 2 Pages 161-169
Published: April 15, 1954
Released on J-STAGE: January 14, 2010
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1954 Volume 3 Issue 2 Pages e1d
Published: 1954
Released on J-STAGE: January 14, 2010
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1954 Volume 3 Issue 2 Pages e1a
Published: 1954
Released on J-STAGE: January 14, 2010
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1954 Volume 3 Issue 2 Pages e1b
Published: 1954
Released on J-STAGE: January 14, 2010
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1954 Volume 3 Issue 2 Pages e1c
Published: 1954
Released on J-STAGE: January 14, 2010
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