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Volume 16 (1970)
- Issue 6 Pages 285-
- Issue 5 Pages 235-
- Issue 4 Pages 165-
- Issue 3 Pages 105-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 16, Issue 2
Displaying 1-11 of 11 articles from this issue
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[in Japanese], [in Japanese]1970 Volume 16 Issue 2 Pages 45-57
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (1629K) -
KAYO KURIYAMA, HIROSHI SHIMURA, TOSHIO TERASHIMA1970 Volume 16 Issue 2 Pages 58-62
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSIn the micro-determination of arsenic using the silver diethyldithiocarbamate method, there have been observed some differences in the relationship between the shape of absorber tube and absorbance at 520 mμ and this point was examined. 1. Even by the use of the same absorber tube, there have been observed some differences in the absorbancy at 520 mμ according to the conditions of each experiment, so that it was necessary to make the calibration curve at every experiment. 2. There was no difference in experimental values when using an apparatus which could insure a more uniform rate of flow of gas into the absorbent. 3. As a result of examining the quality of zinc, a more precise result was obtained by the use of copperized zinc than untreated one. 4. Using the above described method, some biological materials were tested and good results were obtained.View full abstractDownload PDF (569K) -
YASUSHI TAKEDA, ATSUKO NISHIKATA, TOSHIAKI OSAWA, TYUNOSIN UKITA1970 Volume 16 Issue 2 Pages 63-66
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSA highly sensitive and specific spectrofluorometric method for the determination of dibucaine in cerebrospinal fluid was developed. As little as 1 μg/ml of dibucaine in cerebrospinal fluid can be determined. The effect of pH and various anions on the fluorescence intensity of dibucaine is discussed.View full abstractDownload PDF (473K) -
SIGERU MATSUMOTO, AKIKO SAKAI, KOICHI ITO, YASUTAKA KATSUKI1970 Volume 16 Issue 2 Pages 67-70
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSFollowing previous work on the changes in chemical and physical constants after oxidation of methyl linoleate by oxygen at 110°, the same oxidation was carried out at 70 and 90° to improve reproducility of some of the constants. As a result, rate of change in some of the constants decreased and reproducibility was improved. The infrared spectra of the product after oxidation of methyl linoleate under these conditions showed that its double bonds had shifted from the non-conjugated cis-cis form to conjugated trans-trans form, with an increase in peroxide value. The peroxide formed by the oxidation of methyl linoleate was examined by thin-layer chromatography and polarography. The antioxidative effect of butylhydroxyanisole and synergetic effect of citric acid were clearly observed. Even when iron was removed from the sample tested as completely as possible, the synergetic effect of citric acid did not vary and this fact indicated that this effect was not due to the masking of heavy metals by this acid. Synergetic effect of erythorbic acid was further examined.View full abstractDownload PDF (490K) -
SENJI SUENAGA, YOSHIKO SHIRAISHI1970 Volume 16 Issue 2 Pages 71-77
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSSimultaneous separation and determination of organic (methyl, ethyl, propyl, butyl halide and phenyl acetate) and inorganic mercury in water and industrial waste by dithizone extraction method has been developed. Dithizonate of both organic and inorganic mercury salts are quantitatively separated with acidic potassium iodide solution. Organic mercuric dithizonate is further decomposed to inorganic mercury with acidic potassium permanganate solution. By this method, organic and inorganic mercury can be determined at levels of 0.001-0.02 ppm. Effect of chlorine ion, copper, and zinc is negligible.View full abstractDownload PDF (704K) -
GENICHIRO OSHIMA, KINZO NAGASAWA1970 Volume 16 Issue 2 Pages 78-82
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSSpectrophotometric measurement of mercury (II) complex formed with potassium iodide in alkaline medium provides a convenient method for the determination of mercury (II). Although cyanide, cysteine, and egg albumin interfere with this analysis, malonate, glycine and nitrate, and taratrate are anions which interfere at a molar ratio of anion to mercury (II) of 1000 : 1 and 100 : 1, respectively. Though several cations have absorption bands in the ultraviolet region to form a complex with potassium iodide in neutral aqueous medium, the bands of their complex disappear in alkaline medium. Mercury (II) can thus be determined with considerable accuracy by this method in the presence of some cations, such as copper (II), palladium (II), bismuth (III), and platinum (IV), which are known to interfere in its determination by ordinary dithizone method. This method gives as a good result for mercury (II) determination as the usual dithizone method after decomposition of organic mercury (II) compounds by Schoniger's method.View full abstractDownload PDF (630K) -
SHOJI TAKITANI, MASAO SUZUKI, TOMI NAMAI, FUSAKO NAGATA1970 Volume 16 Issue 2 Pages 83-85
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSSeparation and determination of eight inorganic ions by thin-layer chromatography were examined. The metallic ions of Hg2+, Cu2+ and Pd2+ were extracted with dithizone chloroform solution at pH 0-1 (1 N HCl solution) and those of Ni2+, Co2+, Zn2+, Bi3+ and Pb2+ at pH 7-8. These dithizonates were separated on MN-silica gel layer by using carbon tetrachloride-methylene-chloride-benzene (1 : 7 : 4) as a developer. The chromatogram of each dithizonate was determined by densitometry. The coefficient of variation of these determined dithizonates was 0.89-9.81%. This method seemed to be applicable to a simplified determination.View full abstractDownload PDF (414K) -
SHOJI TAKITANI, MASAO SUZUKI1970 Volume 16 Issue 2 Pages 86-89
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSUtilization of the micro-column chromatography was investigated to obtain a comparable results between thin-layer chromatography and column chromatography. The developing feature in column chromatography of substances absorbing in the ultraviolet region was observed directly as a colored zone under improved ultraviolet ray source by the use of an adsorbent containing mixed fluorescent substance and a quartz tube. This method was applied to micro-column chromatography as well as to thin-layer chromatography used in qualitative experiment. Results from the micro-column chromatography were very similar to those from dry column chromatography. When dry column chromatography was to be carried out with reference to the data from thin-layer chromatography, informations on the effect of developer vapor and manner of separation were obtained by the preliminary-use of micro-column chromatography. From these results, the developer and adsorbent for sharp separation were selected.View full abstractDownload PDF (475K) -
NOBORU SUZUKI1970 Volume 16 Issue 2 Pages 90-95
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe degree of air pollution in Yoshiwara district, Shizuoka Prefecture, was examined together with that of Shizuoka City district as a control, and the data were analyzed statistically. Air pollution was greater in the Yoshiwara district and the quantity of fallout components seems to increase year by year. Correlation between various data on fallout was clarified and regression equation was calculated for items with strong correlation. Examinations were also made on the degree of correlation between SO3 and fallout components, and distribution of SO3 and fallout components (T%) was clarified. Concentration of SO3 in Yoshiwara area was about one-half of that in Yokkaichi, and showed a peak once each in the morning and afternoon.View full abstractDownload PDF (672K) -
FUKUJIRO FUJIKAWA, KUNIO HIRAI, TERUHISA HIRAYAMA, MITSUO FUJII, YUTAK ...1970 Volume 16 Issue 2 Pages 96-100
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSIn order to examine the effect of atmospheric pollution on important cultural objects, two kinds of dyed cloth and silk threads were exposed to air and their changes were examined. The dyed cloths were one silk cloth dyed with benzopurpurine 4B, which is easily affected by sulfur dioxide, and one acetate rayon cloth dyed with diacelliton fast brilliant blue B, which is easily affected by nitrogen dioxide. The color of the dyed cloths was measured by a spectrophotometer before and after exposure (June, 1968, and January, 1969). From the analysis of measured values before and after exposure, degree of the effect was examined. It was thereby found that dyed cloths were affected even by the present degree of pollution by sulfur dioxide and nitrogen dioxide. Fragility of silk threads could not be measured by the present examination lasting about 30 days.View full abstractDownload PDF (675K) -
KEIZO WATANABE1970 Volume 16 Issue 2 Pages 101-104
Published: April 30, 1970
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSA new apparatus and method were devised for simple discrimination of hashish (Cannabis sativa L.) at the field, developed by the Office of Narcotics Control. The apparatus consists of two small fountain pen-sized glass cylinders ; the first solution is a chloroform suspension of a minute amount of Echtblausalz B and the second is a dilute aqueous solution of sodium hydroxide. A small amount of a sample is placed in the first solution, shaken for 1 minute, the second solution is layer over the first, and then mixed after 30 seconds. When the two liquids separate and the lower layer (chloroform layer) colors red, then the presence of hashish is suggested. If the chloroform layer does not color red, presence of hashish can be denied. Approximately 900 samples have been tested by this way to date and a good result was obtained, there being no case in which its result was contrary to the result of existing method of evaluation.View full abstractDownload PDF (604K)
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