This paper is about the mathematical methods used in calculating the 12D radiation-dose for a food which has been subjected to an inoculated pack. It concerns the case in which only one partial-spoilage data point is obtained from the experiment. A simple, partly graphical procedure is described. This method is based on binomial confidence limits and furnishes an estimate that lies above the (unknown) true 12D value with probability greater than 90%. The method is applied to an inoculated pack for low-level nitrite/nitrate ham described by Anellis et al. (2).

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Author notes

1Presented at the First International Congress on Engineering and Food, Boston, Massachusetts, August 9–13, 1976.