Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi)
Online ISSN : 1882-1006
Print ISSN : 0015-6426
ISSN-L : 0015-6426
Volume 51 , Issue 2
Showing 1-3 articles out of 3 articles from the selected issue
Originals
  • Yukinari TATEISHI, Tsuneo HASHIMOTO, Keiko USHIYAMA, Naoko SAKAI, Itok ...
    2010 Volume 51 Issue 2 Pages 53-57
    Published: April 25, 2010
    Released: April 29, 2010
    JOURNALS FREE ACCESS
    A simple analytical method was developed for the determination of total bromine in fruits and grain products by means of wavelength dispersive X-ray fluorescence spectrometry (WDXRF).
    Five gram samples of fresh fruits, frozen fruits, dried fruits and grain products were extracted with distilled water twice and diluted to 25 mL with distilled water. The sample solution (0.5 mL) was dripped onto the filter paper, which was dried and analyzed by WDXRF. The working curve was linear in the range of 0 to 10 μg/mL. Recoveries at the level of 5 μg/g were 76-104%. The detection limit was 0.5 μg/g and the determination limit was 1.5 μg/g in foods. Compared to the GC-ECD method, this method gave equivalent results for fresh fruits, frozen fruits and grain products. In addition, some dried fruits, in which a slightly high level was detected, gave almost the same results with the GC-ECD method. Therefore, this method is considered to be available as an alternative to the GC-ECD method.
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  • Tomoyasu TSUKAMOTO, Megumi SHIMIZU, Atsushi YAMAMOTO, Shuji KODAMA, Wa ...
    2010 Volume 51 Issue 2 Pages 58-64
    Published: April 25, 2010
    Released: April 29, 2010
    JOURNALS FREE ACCESS
    A novel multi-functional adsorbent (RP-SAX adsorbent) bearing hydrophobic and anion exchange groups was synthesized for the simple and rapid determination of residual acephate (AP) in vegetables. Macroporous base resin was obtained by suspension copolymerization with glycidyl methacrylate, stearyl methacrylate and glycerin dimethacrylate, and then ethyldimethylamine was introduced at glycidyl groups on the base resin. The adsorbent was packed into a syringe-type tube and used for extraction of AP. AP in the vegetable extract was quantitatively entrapped on the adsorbent and was completely eluted with 3 mL of 30 mmol/L trisodium phosphate in 50% (v/v) methanol solution. The eluate was directly injected into an HPLC-UV detection system with a reverse-phased column. The recoveries of 5 mg/L AP spiked in vegetable extraction samples ranged from 77% to 100%.
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