Alkali Extraction of Starch from Corn Flour

A. H. Mistry, S. J. Schmidt, S. R. Eckhoff, J. W. Sutherland

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The alkali steeping process was tested for extraction of starch from degerminated yellow corn flour. The effect of three process parameters, alkali concentration (0.1 and 0.4%), steep temperature (25 and 55°C) and steep time (30 and 90min) were evaluated for their effect on yield, protein and sodium contents of starch. Two‐level full factorial design was used to investigate the process. The experimental results indicated that starch yield increased with increasing steep temperature and at low alkali concentration. All main effects and interactions were found to have significant effect on protein content in the extracted starch. The sodium content of the starch was effected by the three main effects and the three two‐factor interaction effects. Conditions were identified that simultaneously produced a high starch yield, low protein and sodium contents were 0.1% alkali steep at 55°C for 30 min.

Original languageEnglish (US)
Pages (from-to)284-288
Number of pages5
JournalStarch ‐ Stärke
Issue number8
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Food Science
  • Organic Chemistry


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