Abstract: In this paper, the quality of glutinous rice flour for different purposes was analyzed by using fried glutinous rice flour, water-milled glutinous rice flour and frozen glutinous rice flour as raw materials. The physicochemical indicators such as basic components, particle size, freeze-thaw stability, amylose content, amylopectin content, acidity and pasting properties of glutinous rice flour were detected by national standard methods. The results showed that the average moisture content of the three kinds of glutinous rice flour was about 8.12%, and the crude ash content was about 0.2%-0.6%; the average crude protein contents of fried, water-milled and frozen glutinous rice flour were 6.23%, 6.89% and 6.95%, respectively, and the average values of crude fat were 1.27%, 4.52% and 24.37%, respectively; the average particle volume diameters were 57.95 $ \mu $m, 60.94 $ \mu $m and 58.30 $ \mu $m, respectively; the average amylose contents were 3.177%, 1.128% and 3.499%, respectively, and the average amylopectin contents were 96.823%, 98.872% and 96.493%, respectively; the acidity ranges were 0.052-0.091 mL/g, 0.067-0.093 mL/g and 0.042-0.074 mL/g, respectively; the gelatinization temperature was in the range of 60.3-64.7 ℃. Compared with water-milled glutinous rice flour, fried glutinous rice flour and frozen glutinous rice flour had higher amylose content, lower amylopectin content, smaller particle size, lower acidity and better freeze-thaw stability.
Key words: frozen glutinous rice flour; fried glutinous rice flour; water-milled glutinous rice flour; quality analysis