Index Term — Logit Model, Kinetics data, Photodegradation,

Abstract-- This paper present the role of Logit Model in optimizing photocatalyst dosage in methylene blue (MB) photodegradation system by using prepared photocatalyst. The model was constructed by measuring the percentage of target molecule degraded in the system by using linear and logistic regression. The deviation of the model used to compare the goodness of fit of the three models. The study on the most appropriate model for predicting the effect of catalyst dosage to the MB concentration is discussed