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A Pre-Treatment Model for Ethanol Production Using a Colorimetric Analysis of Starch Solutions

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Resource Information

Description

This module focuses on the production of sugar (glucose and maltose) from cornstarch. The first lesson from this module relates glucose production from cornstarch to ethanol fuel production from corn stover. Another lesson uses a calculator based colorimeter interface from the Vernier® Company to quantify the hydrolysis of starch to sugar by salivary amylase. In this lesson saliva is added to a starch solution containing a couple of drops of iodine. Light initially doesn’t pass through this solution. If the absorption
decreases after the addition of the saliva, this means more light is passing through and the
starch is being hydrolyzed (broken down into maltose and glucose). The third lesson
again uses colorimetry but this time to measure starch hydrolysis by dilute (1% volume to
volume) sulfuric acid. Finally, we offer suggestions for using starch hydrolysis and
colorimetry as a basis for student designed experiments.

Subject(s):

  • Science

Grade(s):

  • High School (9-12)

Topic(s):

  • Energy

NAAEE Guidelines/Strand(s):

  • Strand 1: Questioning, Analysis & Interpretation Skills
  • Strand 2.3: Humans & Their Societies


Resource Type(s):

  • Lessons & Activities

Links(s):

Organization Information

A Pre-Treatment Model for Ethanol Production Using a Colorimetric Analysis of Starch Solutions

Office of Energy Efficiency and Renewable Energy
1000 Independence Avenue, SW
Washington, District of Columbia
www.eere.energy.gov

Organization Type: Natural Resource Education

Contact:
Billie Newland
U.S. Department of Energy
301-903-8595
Billie.Newland@hq.doe.gov

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