摘要：This study aims to determine the optimum parameters for the invert sugar obtaining, using the acid hydrolysis at t oC. The inversion reaction has been applied to 3 samples of sugar solution of different concentration (P 1 : SU = 70%, P 2 : SU = 75 %, P 3 : SU = 80%). For obtaining the invert sugar syrup, different inversion temperatures have been used (t 1 = 80oC, t 2 = 90oC, t 3 = 100oC). The inversion has been done in the presence of the citric acid (c = 0.5 g citric acid / 100 ml solution). The invert sugar is used as a total or partial substitute of the glucose syrup in the confectionery manufacture. Added in the sucrose syrup, it contributes to increase the dry matter/substances content and prevents the binding molecules of sucrose together, so it has the role of anti-crystallization. Based on this study, we have determined the optimum parameters for the invert sugar obtaining , depending on the content in reducing substances of the samples after the inversion operation. As a conclusion, we have got the following results: The inversion process carried out with maximum efficiency for the following samples: sample P 1 with a reducing matters content of 40.64% at the temperature of 80oC; sample P 2 with a reducing matters content of 45.2% at the temperature of 90oC; sample P 3 with a reducing matters content of 76.40% at the temperature of 100oC.
关键词：chemical analysis; acid hydrolysis; redu cing matters substances.
