In addition to the seven products that received an adequate heat
treatment (P70 ¼ 2) for the entire product, there were also several
products in which the periphery (n ¼ 5), the core (n ¼ 4) or one of
the components (n ¼ 2) received a P70 2 while other regions or
components of the product did not. This was most clear in two type
2 products: chicken with rice in curry sauce and tagliatelle carbonara.
While the starch components (rice and pasta) reached
temperatures between 74.9 and 95.1 C, the chicken or sauce did not exceed 57.8 C. In some cases, we also noted that the temperature
was higher at the edge than at the core of the product leading
to a very heterogeneous heat profiles in the food product. These
differences demonstrate that any reheating-process has to be
validated for all spots and all components of a product.