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Calculator for determining the lethality (F, value) of a thermal process using the trapezoid and Simpson's rules
This calculator has been designed to work with pasted time and temperature values from a data logger or individual keyboard inputs. It is unique in that users can compare F values obtained by integrating time / lethality values using the trapezoid rule with the more accurate Simpson's 1/3 and 3/8 rules.
A similar Excel spreadsheet can be downloaded at https://www.dairyscience.info/index.php/thermal-processing/334-download-spreadsheets.html .
How to cite this article
Mullan, W.M.A. (2018) [On-line] Available from: Accessed: