Rapid pretreatment of environmental samples of food and related materials by a microwave dehydration method

A. Nakaoka; M. Fukushima; M. Tsukamoto; S. Takagi

doi:10.1007/bf02060841

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 99: Issue 1

Rapid pretreatment of environmental samples of food and related materials by a microwave dehydration method

Authors:

A. Nakaoka

A. Nakaoka Central Research Institute of Electric Power Industry Otemachi Bldg., 6-1, Otemachi 1-chome, Chiyoda-ku 100 Tokyo Japan

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M. Fukushima

M. Fukushima Central Research Institute of Electric Power Industry Otemachi Bldg., 6-1, Otemachi 1-chome, Chiyoda-ku 100 Tokyo Japan

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M. Tsukamoto

M. Tsukamoto Central Research Institute of Electric Power Industry Otemachi Bldg., 6-1, Otemachi 1-chome, Chiyoda-ku 100 Tokyo Japan

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, and

S. Takagi

S. Takagi Central Research Institute of Electric Power Industry Otemachi Bldg., 6-1, Otemachi 1-chome, Chiyoda-ku 100 Tokyo Japan

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Pages:: 203–217

Online Publication Date:: 14 Aug 2005

Publication Date:: 17 May 1986

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02060841

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Abstract

A rapid and simple radioactivity determination method has been developed for food and related environmental samples of a radioactivity level corresponding to 5 mrem/y, Japan AEC's guideline, by pretreating with a modified microwave dehydration apparatus followed by radiation counting. An equation to estimate the heating conditions by the apparatus has been derived, and results calculated by the equation are in good agreement with experimental data. It took less than 4.5 hours to dehydrate by the propossed method, and radiation counting could be started on the day of sampling and dehydration procedure. The lower limit of detection for each radionuclide by the proposed method, using a Ge(Li) detector of 20% relative efficiency, is lower than one half of the needed detection limit to determine and evaluate the 5 mrem/y level. Radionuclide levels in food samples such as vegetables and crustaceans were determined by the proposed method and it was found that they were below the lower dection limit of the proposed method except natural radionuclide⁴⁰K and fallout-originated¹³⁷Cs.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)