Screening of Preservatives for Pitaya Juice Beverage

Potassium sorbate,sodium benzoate,sodium diacetate,and sodium hehydroacetate were tested as preservatives for pitaya fruit juice beverage to solve the problem of decay during storage.The preservatives with better inhibitory effect were selected,compounded,and added to the beverage,and the effect of different formula on preservation and nutrition in the beverage were conducted in the study.The results showed that the best preservative formula was the combination of potassium sorbate 0.025% and sodium hehydroacetate 0.03%.With this formula,the pitayajuice beverage met the requirement of sensory and physical-chemical indexes,and the optimal pitayajuice content could be 15%,soluble solid11.5%,total sugar 9.56%,and amino-N 4.83mg/100ml,respectively.