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 Notices

Determination of the probability of one or more cans containing one viable organism after commercial sterilisation.
Replace the test values with your data to use the calculator.
Mass of product in can (grams)    
Initial spore load per gram    
Batch size used for control e.g. 1000 cans    
D*121°C value of target micro-organism (minutes)    
Equivalency of heat process to time at 121°C ** (minutes)    
There is a probability of  1 can (s) in a population of  100000000 cans containing 
one viable micro-organism. This may cause  spoilage and/or a public health hazard.
NOTES    
* Decimal reduction time, D, is the time taken to destroy 90% of the organisms at   
a particular temperature. Temperature used is written as a subscript e.g. D*121C°. The D value shown
is within the range for spores of Clostridium botulinum. Note, thermophiles have much higher D values.
** Time at the temperature used to determine the D value is used. This time is expressed 
as the equivalence of total time at this  temperature.  
CAUTION. This calculator is an educational tool and is not warranted in any way. It is not a substitute for
employing a qualified food technologist. The values obtained require interpretation by a qualified person. .
See F calculator  
     

                                                                           
 

How to cite this article

Mullan, W.M.A. (2007) [On-line] UK: Available: Accessed:

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