For analysis the effects of different concentrations of Natamycin on some physicochemical and microbial properties of yogurt, yogurt samples were preserved by addition of Natamycin at 6 different concentrations. Then the properties were measured in 4 different points of time (on weekly basis).
Which method is preferred to analysis the data? Is it possible to use one way anova ignoring the time (i.e do analysis for each point of time separately), or it should be analysis using repeated measure?
It should be note that after measuring each sample properties it throw away! I mean the measures are not repeated on the same sample during the time but on the samples with the same level of treatment.