Glucose Analysis Titration
Channel: crharrison
Date: 2009-01-28

This video demonstrates the analysis of glucose through a pair of redox titrations.  First, the glucose solution is reacted with a known excess of triiodide.  After a short reaction period the remaining triiodide is quantified through a titration with thiosulfate.  The amount of glucose in the solution can be determined from the difference in the number of moles of triiodide used and the number of moles that reacted with thiosulfate.  The endpoint of this titration is made visible through the addition of starch, which turns blue when complexed with triiodide.