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Laboratory Procedure to Wet-Mill 100 g of Grain Sorghum into Six Fractions1

May 2000 Volume 77 Number 3
Pages 392 — 395
X. J. Xie 2 and P. A. Seib 2 , 3

Contribution 99-490-J from the Kansas Agricultural Experiment Station, Manhattan KS 66506. Dept. of Grain Science and Industry, Kansas State University, Manhattan KS 66506. Corresponding author: Fax: 785/532/7010. E-mail: pas@wheat.ksu.edu


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Accepted February 10, 2000.
ABSTRACT

A small-scale (100 g of grain) procedure was developed to wet-mill grain sorghum into six fractions by modifying the procedure of Eckhoff et al (1996). The wet-milling process was repeated five times on commercial grain sorghum, and the mean yield (69.4%) of starch (≤0.3% protein) varied by 0.3%, whereas the yields of fiber, gluten, and germ plus bran fractions varied by 5–6%. The starch fraction accounted for ≈95% of that in the grain, while the total solids recovered was 99.0%. Four other samples of grain sorghum gave 92–95% recoveries of starches and 98.2–99.8% recoveries of total solids. All grain sorghum starches had lightness (L*) values and pasting curves nearly equal to those of a commercial maize starch.



© 2000 American Association of Cereal Chemists, Inc.