18G METHODS OF ANALYSIS 



6 SUGARS.— TENTATIVE. 



Determine reducing sugars and sucrose as directed in VIII, 58 and 59, varying 

 the weight of the sample employed according to its sugar content. 



7 TOTAL ACIDS.-TENTATIVE. 



Proceed as directed in XVI, 25. Express the result as citric acid; 1 cc. of N/10 

 alkali is equivalent to 0.0070 gram of crystallized citric acid. 



8 VOLATILE ACIDS.-TENTATIVE. 



Proceed as directed in XVI, 27. Express the results as acetic acid; 1 cc. of N/10 

 alkali is equivalent to 0.0060 gram of acetic acid. 



9 PRESERVATIVES.-TENTATIVE. 

 Proceed as directed under X. 



10 COLORING MATTERS.-TENTATFVE. 

 Proceed as directed under XI. 



1 1 METALS.— TENTATIVE. 

 Proceed as directed under XII. 



BIBLIOGRAPHY. 



1 U. S. Bur. Chem. Bulls. 125 and 151 ; U. S. Dept. Agr. Bull. 196; U. S. Bur. Chem. 

 Circ. 54; Research Laboratory, National Canners Association, Bull. 2. 



