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Volume 37 (1996)
- Issue 6 Pages 343-
- Issue 5 Pages 247-
- Issue 4 Pages 165-
- Issue 3 Pages 135-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 37, Issue 3
Displaying 1-5 of 5 articles from this issue
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Toshikazu KAISE, Yukiko OYA-OHTA, Takafumi OCHI, Tohru OKUBO, Ken'ichi ...1996 Volume 37 Issue 3 Pages 135-141_1
Published: June 05, 1996
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSMarine organisms frequently contain arsenic in higher concentrations than terrestrial organisms. The water-soluble arsenoriboses are the major organic arsenic compounds in marine algae. We synthesized an arsenosugar, 1-(2′, 3′-dihydroxypropyl)-5-deoxyribosyldime-thylarsine oxide, and examined this compound for cytotoxicity (50%-inhibitory dose; ID50) and for the ability to induce chromosomal aberration and sister chromatid exchanges (SCE). The arsenosugar inhibited the growth of BALB/c 3T3 cells at a concentration of 2mg arsenosugar/ml in the cytotoxicity test. The cytotoxicity of this compound was 1/2800th of that of sodium arsenite and 1/300th of that of sodium arsenate. The aberrations caused by the arsenosugar at a concentration of 5mg/ml consisted mainly of chromatid gaps and chromatid breaks. No SCE was observed at concentrations of 1 to 10mg/ml. These results suggest that the arsenosugar present in marine algae is much less toxic than inorganic arsenic compounds.View full abstractDownload PDF (671K) -
Takeshi TANAKA, Harumi OSHIMA, Yoshinari AOKI, Michiko SASAKI, Jyunko ...1996 Volume 37 Issue 3 Pages 142-145_1
Published: June 05, 1996
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSTo detect trace amounts of arsenic, lead, cadmium and tin in soft drinks, a simple and rapid determination without sample pretreatment was developed. A sample of a soft drink was diluted with distilled water and examined by electrothermal atomic absorption spectrometry with addition of nickel nitrate as a matrix modifier. Detection limits of arsenic, lead, cadmium and tin in the samples were 0.025ppm (as As2O3), 0.025ppm, 0.005ppm and 0.3ppm, respectively.
The developed method was applied to the determination of arsenic, lead, cadmium and tin in 13 kinds of soft drinks (total 150 samples). The amounts of arsenic and lead in the soft drinks were less than 0.025ppm in all samples; cadmium and tin were detected in only 2 (0.006-0.019ppm) and 5 (6.9-86ppm) of 150 samples, respectively. The proposed method is simple and rapid for determination of arsenic, lead, cadmium and tin in soft drinks.View full abstractDownload PDF (412K) -
Shigemi KAI, Takayasu NIKKAWA, Atsuko TAKAHASHI, Akiko KOIZUMI, Yukio ...1996 Volume 37 Issue 3 Pages 146-150_1
Published: June 05, 1996
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSA simple and rapid procedure for sample preparation has been developed for determination of acid coal-tar dyes in confectionery by the matrix solid-phase dispersion (MSPD) method. Confectionery samples spiked with food dyes (12 permitted and 4 non-permitted in Japan) were blended with octadecylsilyl (C18)-derivatized silica packing material pretreated with cetyltrimethylammonium bromide-methanol. A column containing the C18/confectionery matrix was first washed with water, then the dyes were eluted with methanol. The eluate from the column was free from interfering compounds as confirmed by thin-layer and high performance liquid chromatography with UV detection at 254nm. Recoveries of acid coal-tar dyes from confectionery spiked at 100μg/g were 76.7-102.4%.View full abstractDownload PDF (558K) -
Yumiko NAKAMURA, Yukari TSUMURA, Yasuhide TONOGAI, Tadashi SHIBATA1996 Volume 37 Issue 3 Pages 151-157_1
Published: June 05, 1996
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESSThree methods for the removal of lipids, i. e., the GPC method with a mixture of ethyl acetate-cyclohexane (1:1, v/v), the n-hexane/acetonitrile partition method, and the Extrelut-3/Sep-pak® C18 method, were compared in the analysis of pyrethroid pesticide residues in crops. Efficiencies of the removal of lipids in salad oil, brown rice and soybean were 51.0-77.4% by GPC, 61.6-96.4% by n-hexane/acetonitrile partition and 73.8-98.4% by the Extrelut-3/Sep-pak® C18 method. Recoveries of 10 pyrethroid pesticides from brown rice (fortified at 0.2-0.4ppm) were 72.2-130% by GPC, 62.5-100% by n-hexane/acetonitrile partition, and 61.5-96.3% by the Extrelut-3/Sep-pak® C18 method, respectively. Therefore, the Extrelut-3/Sep-pak® C18 method seems to be the most suitable for the removal of lipids in the analysis of pyrethroid pesticide residues in crops because of its efficiency and simplicity.View full abstractDownload PDF (697K) -
Masahiro MIYATA, Yoshichika HIRAHARA, Mikako NARITA, Mika KIMURA, Yosh ...1996 Volume 37 Issue 3 Pages 158-164_1
Published: June 05, 1996
Released on J-STAGE: December 11, 2009
JOURNAL FREE ACCESS
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