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Measuring water activity in frozen foods

Started by psunjka, Dec 02 2011 02:38 PM
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psunjka

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Posted 02 December 2011 - 02:38 PM

Hello evryone, I just want to know if someone has any experience in measuring water activity in frozen foods. We have measured aw in our frozen meat and got very high values, even above 1 (aw meters have been calibrated and work properly). Does anyone have an explanation why we have aw values over 1?

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Simon

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Posted 30 December 2011 - 04:37 PM

Anyone have experience on this subject to share?

Regards,
Simon

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Charles.C

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Posted 31 December 2011 - 07:42 AM

Dear psunjka,

Probably a measurement error. aw not > 1 unless very unusual system is involved (eg 3rd atttach.), -

Attached File  graph water activity of range of foods.png   53.13KB   3 downloads
Attached File  Aw_foodsafety.pdf   52.53KB   58 downloads
Attached File  transport phenomena - JES07.pdf   2.02MB   36 downloads

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Kind Regards,

 

Charles.C

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