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Volume 18 (1972)
- Issue 6 Pages 347-
- Issue 5 Pages 291-
- Issue 4 Pages 237-
- Issue 3 Pages 107-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
Volume 18, Issue 6
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1972 Volume 18 Issue 6 Pages 347-352
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (804K) -
SATOSHI OKADA, SOICHIRO IGA, HIROSHI ISAKA1972 Volume 18 Issue 6 Pages 353-357
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe amount of formaldehyde was determined in edible mushroom, Lentinus edodes (BERK.) SING, Japanese name (Shiitake). When the official steam distillation method is applied to the determination of formaldehyde in the mushroom, not only free formaldehyde but acid hydrolysed aldehyde would be detected simultaneously. The first appears to be liberated by enzymic reaction, and the second to be produced by acid hydrolysis of a certain constituent of the mushroom. In view of hygienic science, only the liberated formaldehyde would be of importance, and this could be determined by direct colorimetry with acetylacetone. The results obtained on 25 samples showed the average amount of formaldehyde to be 199 μg (100-280 μg) per gram of dried mushroom, which is about one-half of that measured by the steam distillation method.View full abstractDownload PDF (703K) -
HIROKATSU AKAGI, YONEJI SAKAGAMI1972 Volume 18 Issue 6 Pages 358-362
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSExamination was made on the formation of alkylmercury compounds by the sunlight or blacklight irradiation of mercuric chloride together with acetic acid, propionic acid, methanol, or ethanol in water. Alkylmercury compounds formed in the aqueous solution were extracted and subjected to qualitative and quantitative analyses by thin-layer chromatography, mercury, analyzer, and gas chromatography. As a result, it was found that methylmercury compound was the sole one formed in the aqueous solution of mercuric chloride in the presence of acetic acid, methanol, or ethanol with either sunlight or blacklight, while both ethylmercury and methylmercury compounds were formed in the presence of propionic acid. Teh quantitative analysis showed that fatty acids contributed remarkably to the formation of alkylmercury compounds in comparison with alcohols.View full abstractDownload PDF (625K) -
YASUHIDE TONOGAI, YUKIO NOMURA1972 Volume 18 Issue 6 Pages 363-367
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSA chelate extraction-atomic absorption procedure for the determination of heavy metal contaminants in food coal-tar dyes has been developed by using sodium diethyldithiocarbamate as the chelating reagent. This method can be adapted to the sample without digestion, and Fe (III), Zn (II), Cr (VI), Pb (II), Cu (II), Cd (II), and Mn (VI) were quantitatively extracted from aqueous solution of food dye into butyl acetate by one extraction. Therefore, official inspection of coal-tar dyes could be carried out more speedily by this method than the method adopted in Japanese Standards of Food Additives.View full abstractDownload PDF (616K) -
KATSUHIKO NAKAMURO, YASUYOSHI SAYATO, MASAHARU TONOMURA, YOUKI OSE1972 Volume 18 Issue 6 Pages 368-373
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSWhole body turnover, excretion and time-distribution of selenium in rats were examined after administration of Na275SeO4. It was found that 60% of the selenium administered was absorbed through the intestine and excreted mainly in urine. The excretion of 75Se-containing metabolite in the respiratory was confirmed. Selenium was rapidly accumulated in the liver as the first target organ, and subsequently moved into various organs through the blood. The biological half life of the C period was found to be 22.44 days which indicates that excretion of selenium in various tissues is comparatively rapid. Studies on the behavior of selenium in blood using Na275SeO4 demonstrated that selenium passes through the membrance of red blood cells and combines with hemoglobin.View full abstractDownload PDF (738K) -
TETSUO INOUE, MASAYOSHI TATSUZAWA, HIROHIKO KIFUNE1972 Volume 18 Issue 6 Pages 374-380
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSColorimetric determination of diphenhydramine hydrochloride and diphenhydramine salicylate in mixed pharmaceutical preparations was examined and highly selective and precise method was established. Diphenhydramine was oxidized by potassium dichromate in acidic medium to produce benzophenone which reacted with 2, 4-dinitrophenylhydrazine to from benzophenone-2, 4-dinitrophenylhydrazone which colored red by the addition of an alkali agent. The colored solution had absorption maximum at 475 nm. Presence of phenacetine, acetaminophene, diphenylpyraline hydrochloride, Pandoryl-P, Tonzylamine hydrochloride, and Mebhydroline Napadisylate interfered in this reaction but phenacetine and acetaminophene could be eliminated by extraction with hexane in basic or acidic medium.View full abstractDownload PDF (712K) -
TETSUO INOUE, MASAYOSHI TATSUZAWA, MEISHIEN LO1972 Volume 18 Issue 6 Pages 381-387
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSColorimetric determination of phenacetine and bucetine in mixed pharmaceutical preparations was examined. Phenacetine and bucetine reacted with nitric acid-acetic acid-0.1% sodium nitrate solution (30 : 20 : 0.1) to give a yellow color. These chromogens could be extracted into chloroform and showed absorption maximum at 392 and 390 mμ, respectively. Presence of acetaminophene, salicylamide, pyrazolone, potassuim guaiacolsulfonate, glycerylguaiacolether, and ascorbic acid interfered with this determination but they could be eliminated by extraction with ethyl acetate in basic or acidic medium.View full abstractDownload PDF (794K) -
RYUZO TAKESHITA, TAEKO YAMASHITA1972 Volume 18 Issue 6 Pages 388-392
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSChromatographic patterns of chlorinated pesticides (DDT, DDE, Aldrin, Dieldrin, and Endrin), and polychlorinated biphenyls (PCBs ; Kanechlor 200-600, and decachlorobiphenyl) obtained by reversedphase partition thin-layer chromatography (TLC) were compared with those obtained by adsorption thinlayer chromatography. The compounds were separated with two TLC systems ; liquid paraffin-silica gel/methanol-water and silica gel/hexane, and visualized on the layers by silver nitrate-UV irradiation. The pesticides were separated as sharp spots on either of liquid paraffin-silica gel and silica gel layers. The chromatographic patterns of the pesticides and PCBs on the former layers contrasted in Rf values with those on the letter layers. Only on the liquid paraffin layers, each Kanechlor was observed as slightly overlapped spots, more or less than 10, and the distribution of a polychlorinated biphenyl on the layer was dependent on the chlorine content in the individual components constituting the biphenyl. Thin-layer chromatography of both the pesticides and PCBs is useful for the confirmation of results obtained by gas-liquid chromatography.View full abstractDownload PDF (637K) -
YOUKI OSE, MIDORI KIRIYAMA, SHUICHI WATANABE, SHIRO TANI, TADANORI HIR ...1972 Volume 18 Issue 6 Pages 393-395
Published: December 31, 1972
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSBased on the recent proposal that the Cl- concentration in night soil of 5500 ppm used as standard should be re-examined 87 samples of night soil were selected at random from night soil treatment plants iu Gifu Prefecture over a 9-month period and their Cl- concentration was measured by the mercuric nitrate method, using 1000-fold diluted solution, which was found to be the best method for this analysis. Mean and standard deviation of Cl- concentration were 5362 and 864 ppm, respectively. There was no statistically significant difference in the mean values between cities and in monthly variations, at the 5% level of significance. The values of x^-±σ and x^-±2σ for the 86 samples eliminating the critical values were calculated, and 76.7 and 91.8% of the samples were in these respective ranges. Cl- concentration in night soil differs according to the ratio of urine to feces, and this concentration in urine differs according to the water intake, amount of respiration, and food intake of the people, but the present experiments demonstrated that the value of 5500 ppm is representative as the standard of Cl- concentration in night soil.View full abstractDownload PDF (468K)
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