University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Rice Milled

Classification: Agricultural -> grain -> rice -> milled

Citations 1

"Rapid Determination Of Amylose In Milled-rice And Flour Using Flow Injection Analysis"
Nogyo Oyobi Engei 1990 Volume 65, Issue 12 Pages 1373-1379
Nakajima, Hideharu (SFS)

Abstract: A flow-injection automated analyzer, with 0.1 N KOH and I as reagents, was used to determine amylose in rice and wheat flour. The powered sample (20 mg) was mixed with 2 mL 0.1N KOH and kept at room temperature (20-25°C). After precipitation overnight, the insoluble starch settled as a ppt. and the soluble amylose remained in solution The amylose solution (supernatant) was flow-injected into the automated analyzer and amylose reacted at pH 4.5-4.7 with I to form a purple-green complex, which was determined by spectrophotometry at 620 nm. Rice and wheat flour contained ~15.1-17.7% and ~24.2-26.9% amylose, respectively. (SFS)