Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
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Volume 49, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • Recent Trend of Ion Exchange Membrane Technology (Part 1)
    Shigeru ITOI, Kazuya OHKUBO, Akihiro KAWAGUCHI, Takehito KAWASHIMA, Ma ...
    1995 Volume 49 Issue 1 Pages 3-21
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.3
    JOURNAL FREE ACCESS
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  • Determination of Cadmium in Sea Waters by Graphite Furnace Atomic Absorption Spectrophotometry after Preconcentration by Solvent Extraction
    Jin-Sik LEE, Won-Hyung CHOI, Katsuya UESUGI
    1995 Volume 49 Issue 1 Pages 22-26
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.22
    JOURNAL FREE ACCESS
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    A rapid preconcentration method based on solvent extraction and bacic-extraction is described for the determination of cadmium in sea water by graphite furnace atomic absorption spectrophotometry. Cadmium of ngl-1 level in sea water was extracted as a picolinaldehyde-4-phenyl-3-thiosemicarbazone complex from sea water in chloroform and then back-extracted into nitric acid. Cadmium are quantitatively separated and concentrated from the elements in sea water, and the value of the recovery was 93.6-97.0%. The concentration of cadmium in coastal sea water was found to be 66-125ngl-1 by the proposed method.
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  • Rare-earth Elements in Solar Salts
    Takao OI, Koji OGIWARA, Mitsuaki YUI, Tomoko OSSAKA, Masao MUKAIDA, Te ...
    1995 Volume 49 Issue 1 Pages 27-32
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.27
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    Contents of rare-earth elements (REE's) in solar salts were measured by the neutron activation analysis in which a precipitation process with aluminium as a collector of REE's was incorporated into the preparation of samples for neutron irradiation. Ten or eleven elements out of 14 naturally occurring REE's were determined at ppb levels. The REE patterns obtained by normalization with the REE contents in Leedey chondrites somewhat differed from sample to sample, but they had common shapes, having negative slopes in light REE's and being nearly horizontal in heavy REE's. It was clarified that relative concentrations of REE's were higher in solar salts than in seawater.
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  • Isotopic Composition of Lithium in Seawater
    Takao OI, Takako KOZAWA, Tomoko OSSAKA, Masao NOMURA
    1995 Volume 49 Issue 1 Pages 33-37
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.33
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    Lithium extraction from natural waters by cation exchange chromatography was studied. The experimental conditions were: cation exchange resin, AG50W-X8 (200-400 mesh); resin bed, 30.0cm×2.0cmφ; eluent, 0.5M HCl; flow rate, 4.0cm3/min; temperature, 25.0°C. Under these conditions, lithium was perfectly separated from other cationic components within experimental errors and the degree of lithium recovery was 99%.
    The isotopic ratio (7Li/6Li) of extracted lithium was measured with a double-filament surface ionization technique on a mass spectrometer. The 7Li/6Li value of seawater relative to that of a lithium isotope standard (CBNM-016; 7Li/6Li=12.289±0.052) was 1.0294 as the average of seven measurements, and the standard deviation was 0.0008.
    The lithium isotopic compositions of the natural waters examined (one seawater and five hot spring waters) varied between +1.4 and +29.4 expressed in permil deviation from the isotopic ratio of the isotope standard. This indicates a possibility that lithium isotopic compositions of natural materials may be used as a tracer in geochemical studies.
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  • Typical Corrosion Forms and These Outlines (Part 1)
    Hideo TOGANO
    1995 Volume 49 Issue 1 Pages 38-44
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.38
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  • Report on Joint Symposium between Japan and China
    Akira YAMAUCHI, Takuo KAWAHARA
    1995 Volume 49 Issue 1 Pages 45-49
    Published: 1995
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.49.45
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