16,6 Quisumbing: Determination of Glucose and Starch 599 
A new method for the analysis of starch and glucose has 
been developed and applied to the determination of starch in 
commercial starch and flour. The method would give results 
as accurate as the Munson and Walker method with commercial 
starch. However, it cannot be used with flour with the acid 
hydrolysis method. For the determination of the latter, the 
Saliva or the diastase method should be used. In either case, 
the alkaline potassium permanganate is practically as reliable 
as the Munson and Walker method. 
CONCLUSIONS 
1. A method for the determination of glucose and starch has 
been developed, 
2. A description of the method is given. 
3. The method is applicable to commercial starch, whether 
hydrolyzed by acid or by diastase. 
4. When the flour is analyzed, it should be hydrolyzed by 
the saliva or the diastase method. If it is hydrolyzed by acid, 
the results obtained by the new method are about 10 per cent 
higher than those obtained by the Munson and Walker. 
5. Some of the results obtained in these experiments on the 
concentration of alkali most favorable to the oxidation of glu- 
cose by alkaline potassium permanganate agree with those of 
the previous work on the subject. 
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