Variations of amaranth flour particle size indicator

Abstract

The quality of baked goods is mainly determined by the baking properties of the processed flour. The size of flour as a factor determining the rate of biochemical and colloidal processes in the dough, the properties of the dough, the quality and yield of bread, is an essential indicator of its baking value. In the techno chemical control of bakery production, the method for determining the size of flour is used as a method for determining the size of its particles and is carried out in accordance with GOST 27560–1987. The essence of the method of sieve analysis of flour is to control the fineness with the separation of the prepared sample into separate fractions, to establish the percentage of waste and passage through a set of sieves in accordance with GOST 4403–1991 and calculation of the average equivalent particle size. The purpose of this work was to analyze the variation in the size of amaranth flour obtained in laboratory and industrial conditions. For the variable attribute of the empirical population - the size of amaranth flour, as a result of the analysis of variations, interval series were constructed to obtain a median value characterizing the weighted average particle size. Sieve analysis of amaranth flour (6 samples) showed that the size of the flour can meet the requirements of GOST 7045–2017 for the content of the residue on a sieve made of silk fabric № 27 and be no more than 2% as for seeded rye flour; the requirement of GOST 7045–2017 for the passage through a sieve made of silk fabric № 38 and be at least 30% as for rye whole flour; the requirement of GOST 26574–2017 for the passage through a sieve of silk fabric № 38 and be at least 35% as for wheat whole flour; the requirement of GOST 26574–2017 for the passage through a sieve made of silk fabric № 38 and be at least 65% as for second grade wheat flour. Variations in the size index of amaranth flour (out of 6 samples) can be arranged in ascending sequence: 173,74 μm < 175,84 μm < 180,31 μm < 193,35 μm < 211,75 μm < 214,32 μm.