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Articles by Ottavia Stalio
Total Records ( 1 ) for Ottavia Stalio
  Alyexandra Arienzo , Francesca Losito , Ottavia Stalio and Giovanni Antonini
  The objectives highlighted in the present study were to determine the estimates of measurement uncertainty associated with microbiological analysis in food samples performing a gage repeatability and reproducibility study on three different microbiological methods of analysis for the detection and quantification of total coliforms; Plate count method, 3M PetrifilmTM count plates method and the MBS method. For all three methods the contribution the total gage R and R is less than 10%, demonstrating the ability to accurately evaluate the concentration of total coliforms in food samples. However, the repeatability and reproducibility follows the tendency; Plate count method<3M PetrifilmTM count plates method<MBS method. The study also highlights that a significant variation is due to the interaction between the operators and the analyzed samples for plate count and 3M PetrifilmTM count plates methods while for the MBS method it does not significantly affect the measure. Together these results demonstrate that greater repeatability and reproducibility are connected to a more simple analytical procedure demonstrating that uncertainty is certainly related to the amount of manual work and the individual interpretation of results. Results confirm that it is important to diminish these sources of error reducing labor and simplifying procedures and increasing automation.
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