pH influence the chemical reaction and the enzyme, as well as the growth of microorganisms. The storage at room temperature was pH decreased more quickly due to the growth of microorganisms. For a low temperature was pH gradually decreased because the in storage at a low temperature can slow of microbial growth. pH for the samples, an indication of high acidity may confer longer keeping quality of plants (Nzeagwu OC and Undugwu AN, 2009).