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Volume 45 (1991)
- Issue 6 Pages 315-
- Issue 5 Pages 253-
- Issue 4 Pages 188-
- Issue 3 Pages 126-
- Issue 2 Pages 61-
- Issue 1 Pages 3-
Volume 45, Issue 5
Displaying 1-8 of 8 articles from this issue
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Totaro GOTO1991 Volume 45 Issue 5 Pages 253-258
Published: 1991
Released on J-STAGE: February 19, 2013
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Masana OGATA, Kuniyasu FUJISAWA1991 Volume 45 Issue 5 Pages 259-266
Published: 1991
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSRepresentative cases of oil tainted fish found in Japan were described. A survey of oil flavoredfish found all over Japan indicated that those fish were contaminated by wastewater from oilrefineries and by oil spilled at sea.
In order to identify the compounds responsible for oily taint in fish caused by the ingestion ofoil wastewater, grey mallets were caught in the sea located near the oil refinery. As a result, itis indicated that toluene was present in the grey mallet.
An investigation was made of the compounds present in the oil tainted fish. Toluene and benzenewere found in fish tainted by wastewater from oil refineries, olefinic and monoaromatichydrocarbons in fish contaminated by spilled heavy oil A and alkylbenzothiophenes in fish contaminatedby spilled heavy oil C.
Organic sulfur compounds including dibenzothiophene and alkyldibenzothiophenes were found inthe sea sediment and mussels in the port polluted by the petroleum leaked from ships.
In conclusion, toluene and organic sulfur compounds are available as indices of oil pollution in the sea.View full abstractDownload PDF (5806K) -
Katsuwo OKUBO1991 Volume 45 Issue 5 Pages 267-275
Published: 1991
Released on J-STAGE: February 19, 2013
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Hiroshi TOKUDA1991 Volume 45 Issue 5 Pages 276-282
Published: 1991
Released on J-STAGE: February 19, 2013
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Shigenori MURATANI, Shigetaka KISHIMOTO, Yoshifumi AKAMA1991 Volume 45 Issue 5 Pages 283-286
Published: 1991
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSThe malic and citric acids that are added in sodium chloride to improve the taste of pickles havebeen ordinarily determined by gas chromatography, but this method is complicated and time consumlng.
A simple high performance liquid chromatographic method [HPLC] has been developed for thedetermination of these acids in sodium chloride samples. The proposed procedure was tested asfollows. About 5 g of a sodium chloride sample were dissolved in water and diluted to exactly 50ml. A 20μl aliquot of the sample solution was injected into the chromatograph after filtrationWith a Millipore filter (0.45μm). The HPLC separatiOn Was performed on a Shim Pack CLC-ODS column (150mm×6mm i. d.), using 10mmol phosphate buffer (pH 2.3) in the mobile phase at aflow rate of 1.0ml/min. The analyses were determined using an ultraviolet detector at 210nm. The standard solutions of malic and citric acids were treated by dissolving them in pure sodiumchloride in the same manner in which the sample was prepared. Linear calibration curves wereobtained for the range 0-200μg/ml for each acid.
The detection limits were approximately 30ng for malic acid and 10ng for citric acid.View full abstractDownload PDF (2410K) -
Norio TAKAGI, Takahiro HIROTSU, Kazuhiko SUGASAKA, Nobuharu TAKAI, Tak ...1991 Volume 45 Issue 5 Pages 287-293
Published: 1991
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSAdsorption of uranium on fluidized amidoxime-resin beads from seawater was explored by usingan adsorption apparatus manufactured for this study. The adsorption rate of uranium on theamidoxime-resin beads did not depend on the flow rate of seawater over the range 60-240 h-1. Steady fluidization of the amidoxime-resin particles was observed at a seawater flow rate of 10-30cm min-1. Under the condition of the steady fluidization, the adsorption of uranium was successfullycarried out over approximately one year, the extent of uranium recovery being 76% in the summer season and 41% in the winter season.View full abstractDownload PDF (5787K) -
Masaaki IWATSUKI, Yasushi NIINO, Tsutomu FUKASAWA1991 Volume 45 Issue 5 Pages 294-299
Published: 1991
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSA 10 g sample dried at 110°C was ground by a vibrating mill for 4 min, mixed in a polyethylenebottle, and pressed into an aluminum ring (40 mm i. d., 5 mm high) under a pressure of 30 tons to makea sample briquet. Peak intensities of Kα lines of the minor elements in the briquet were measuredby the method of fixed time, 100 s. Background intensities were also measured to get net intensities. Furthermore, the Cl Kα intensity was measured as an internal standard to get the intensity ratiosof the Kα line of each element to Cl Kα. Standard samples were prepared by careful mixing ofgiven amounts of the minor elements with the guaranteed reagent of sodium chloride. Calibrationcurves of both the intensity and intensity ratio vs. the concentration were obtained with goodlinearities. Determination results of calcium, strontium, and sulfate ion in ordinary salt, sun-driedsalt, Chinese salt, and Australian salt by the present method agreed well with those by the conventionalmethods. A standard addition method also gave similar good results. On the other hand, both sides of the briquet sample of ordinary salt and Chinese salt, which were hygroscopic, showedoften large discrepancies in intensities of Mg Kα or K Kα, and further investigation is required for the determination of magnesium and potassium in these salts.View full abstractDownload PDF (3577K) -
Akira YAMAUCHI1991 Volume 45 Issue 5 Pages 300-304
Published: 1991
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSDownload PDF (3597K)
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