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Determination of hydrogen as a marker in irradiated frozen food

✍ Scribed by Hitchcock, Christopher H?S

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
87 KB
Volume
80
Category
Article
ISSN
0022-5142

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✦ Synopsis

The determination of hydrogen from thawed samples of frozen food offers a reliable, rapid and robust method for the detection of prior irradiation. Being based on an electronic sensor incorporated into a simple headspace analyser, it is particularly useful as a cheap on-site screening procedure. False positive results are not observed (except after obvious gross microbial contamination), but failure to detect hydrogen provides no proof of an unirradiated sample. The technique is limited to frozen foods (eg chicken) which can be thawed inside the analyser; samples of at least 100 g are needed for con®dent detection of doses above 1 kGy after 4 months' storage at À18 °C.

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