Vestnik MGTU (Sep 2018)
Development of technology of sauce from regional raw materials with the addition of pectin
Abstract
The production technology of sauce from cranberries and apple pectin has been described. The characteristics of the main raw material have been considered. The results of marketing researches of assortment of sauces, realized in large trading networks of Murmansk, technological scheme and a recipe of cowberry sauce with addition of apple pectin have been presented. The properties of pectin and its effect on the consistency and organoleptic characteristics of sauce have been studied, and the effect of citric acid on the color palette of finished products has been established. To search for a composition close to the optimal composition of the sauce, the method of planning the experiment has been used with the processing of results by the nonlinear regression method using the computer program Datafit 9.0. The results of the determination of the amount of ascorbic acid and the dynamics of the vitamin C content during storage in a cooled and frozen shocked ready-made sauce by the method of direct iodometry have been presented. It has been established that in the frozen product vitamin C is kept better than in the cooled product, the use of a portion of fresh sauce in an amount of 30 g covers 11 % of the daily physiological rate of vitamin C intake. The amount of pectin substances has been determined using the gravimetric method in the prepared sauce and raw materials. The amount of pectin substances in cowberries is 0.31 %, and in the finished sauce – 4.94 %. The comparative analysis of the obtained results with normative documents has been given. The influence of ultraviolet irradiation on the microbiological parameters of the finished product during storage has been studied. The results of microbiological studies of the sauce before and after ultraviolet irradiation have been presented. The bactericidal effectiveness and the volume bactericidal dose (exposure) have been calculated. The time of irradiation sufficient for the death of pathogenic microflora has been calculated. To achieve the required bactericidal effectiveness, the exposure time is 3 seconds. The effect of ultraviolet bactericidal irradiation on the tested products has been studied in accordance with the calculated data, a comparative analysis of the results obtained has been carried out. The approximate shelf life of the cowberry sauce has been stated.
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