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Volume 22, Issue 3
Displaying 1-13 of 13 articles from this issue
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Shigehisa IWAI1993 Volume 22 Issue 3 Pages 129
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Atsuhiro HONDA1993 Volume 22 Issue 3 Pages 130-131
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Seiichi KOTANI1993 Volume 22 Issue 3 Pages 132-133
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Atsuhiro HONDA1993 Volume 22 Issue 3 Pages 134-137
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Hiroaki HIRANO, Takashi SHIGIYA, Yasunori KAGAWA1993 Volume 22 Issue 3 Pages 138-142
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Toshihiro MATSUNO1993 Volume 22 Issue 3 Pages 143-144
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Takashi YONEDA, Eiji TANAKA1993 Volume 22 Issue 3 Pages 145-148
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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Yoshinao KANO, Hiroki NAKAMURA, Tomohiko SUGIURA, Masahide YAMADA, Ryo ...1993 Volume 22 Issue 3 Pages 149-157
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSWe tried to develope pretreatment method for pesticides in golf course with use of solid phase extraction. Recovery rates of 24 pesticides, analyzable with GC/MS, with using of various solid phase extraction as a pretreatment were investigated. Reverse type solid phase, silica-based and ODS bonded, showed better recovery rates with the exception of trichlorfon. Trichlorfon could be well extracted when NaCI was added and solid phase extraction was successively used. As for polystyrene gel and polymethacrylate gel as solid phase, good recovery rates were obtained with a careful selection of solvents as elute with the exception of some pesticides.
As for 7 pesticides, analyzable with HPLC, good recovery rates were obtained with using of poly-styrene gel and polymethacrylate gel as a solid phase.
These sollid phase extraction method was applied to actual environmental samples.View full abstractDownload PDF (942K) -
Masahiro MORI, Etsuko CHIBA, Kazuo MORIMOTO1993 Volume 22 Issue 3 Pages 158-164
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSThe melting temperature of the fibrous matter containg amosite asbestos is about 1, 300°C and still high. The operating temperature would then be needed to be lowered in the smelting process. So the effects of various flux on the melting temperature of the fibrous matter body were estimated experimentally. Such flux as borax, sodium silicate (water glass), ortho sodium silicate+potasium silicate or ortho sodium silicate+lithium silicate proved to reduce the temperature from 1, 300°C to 800-900°C.
In addition, about 95% of volume reduction was achieved and amosite asbestos was annihilated by the smelting.View full abstractDownload PDF (5870K) -
—pH Measurement by Using Reference Electrode Unit for Flow Analysis—Mitsuhiro MATSUMOTO, Toshiya TANAKA, Naotaka UEDA, Susumu TOMITA1993 Volume 22 Issue 3 Pages 165-170
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSA pH meter equipped with a device to provide a continuously renewed liquid junction between a sample solution and an internal solution of reference electrode was used for the pH measurement of rain waters. Stable responses were obtained within 1 minute and the pH could be determined with the coefficient of variation of 0.1% even when the electric conductivity of sample solution was below 20μS/cm.
Differences in pH between conventional and present methods were increased for the rain water samples whose electric conductivities were below 20μS/cm. Ion balance and electric conductivity balance calculations on 169 rain water samples suggested that the present method gave more reliable pH values than the conventional one.View full abstractDownload PDF (758K) -
Tsuneya TSUCHINAGA, Genta UNO, Hiroshi KAWASHIMA1993 Volume 22 Issue 3 Pages 171-182
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
JOURNAL FREE ACCESSIn order to elucidate the characteristics of water quality fluctuation of Yodo river, regression analysis was carried out by using the daily data which were obtained by the measurement with 20 items at TOYOSATO Station. The concentration of measured substance, except BOD and ammonium nitrogen, was fitted to the following equation C=a⋅ Qb, in which C and Q are concentration and flow rate, respectively, and a, b are constant.
The concentrations of inorganic dissolved substance and dissolved organic carbon are decreasing with an increasing flow rate. The concentration of suspended substance is increasing with increasing flow rate. The concentrations of organic pollutants, nitrogen compounds, potassium ion and magnesium ion are decreasing with an increasing flow rate below ordinary flow rate, but those concentrations increase with an increasing flow rate above ninety-five-day flow rate (350m3/sec) . This is because of wash loading effect by change of flow rate and rain-fall.
The concentrations of BOD and ammonium nitrogen was not related to flow rate, and it was thought because of the effect of water temperature. Those have been classified into 3 categories.View full abstractDownload PDF (1539K) -
Kazuo HIIRO1993 Volume 22 Issue 3 Pages 183-186
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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[in Japanese]1993 Volume 22 Issue 3 Pages 187-188
Published: March 30, 1993
Released on J-STAGE: March 18, 2010
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