Post-script - we cite 2-8 °C rather than 4 °C in our documents (CPA,
papers, etc.) as our refrigerator storage temperature to be safe.
Perhaps we have a lot of older 'friges...
We also cite -20 °C as the deep-freeze storage temperature although many
run at lower temperatures.
Bob
In message <005501beeeef$bc654360$f5d3d3d3@intranet>, Dirk Bakkeren
<[log in to unmask]> writes
>I think it has more then historical reasons.
>
>Of course older fridges were not able to maintain an equal temperature
>throughout the whole box and to maintain a steady temperature at about the
>set temperature. Therefore a temperature had to be choosen that would
>certainly provide good storage condition with respect to sample (and food)
>deterioration and bacterial growth. At the same time, however, the products
>should not be frozen every time the fridge started a cooling cycle. So the
>set temp should be high enough above 0°C to prevent water-rich fluids
>(samples/food) from repeated freezing.
>
>This is, I think, the main reason for the 4°C limit
>
>Dr. Dirk Bakkeren
>clinical chemist
>Diaconessenhuis Eindhoven
>Ds Th Fliednerstraat 1
>5631 BM Eindhoven
>Nederland
>
>----- Oorspronkelijk bericht -----
>Van: Dr. M. Steiner <[log in to unmask]>
>Aan: <[log in to unmask]>
>Verzonden: dinsdag 24 augustus 1999 17:32
>Onderwerp: Fridge temperature
>
>
>> Dear Colleagues,
>>
>> The following question came up in a discussion related to storage of
>> serum samples in the cold:
>>
>> The usual claim (unless checked!!) is that we store samples, chemicals
>> etc. in the fridge at 4°C. Is there any historical root explaining why
>> exactly 4°C has been selected?
>>
>>
>> Sincerely,
>>
>> Dr. med. Michael Steiner
>> University of Rostock
>> Institute of Clinical Chemistry and Pathobiochemistry
>> Ernst-Heydemann-Str. 6
>> D-18057 Rostock
>> GERMANY
>>
>
--
bob.flanagan
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