CHAPTER XVIII. 



The quantities to be used for each test are given in length of 

 column in a test tube. 



CARBOHYDRATES. 



Those in italics occur in the organs or secretions. 



Mono- 

 Glucoses. 



(C 6 H 12 6 ) 



Di- 

 Saccharoses . 



Dextrose. (Glu- rl mol. Dextrose. 



Saccharose - 



- 



11 mol. Levulose. 



Maltose ... 2 mols. Dextrose. 

 (1 mol. Dextrose. 

 mol. Galactose. 





(1 

 1 1 



Poly-saccharides 

 Amyloses. 

 (C,H w O.)n 



Starch. 



Soluble Starch. 



Dextrins. 



Animal Gum. 



Glycogen. 



Cellulose. 



cose or Grape 



Sugar). 

 Galactose. 

 Levulose. 

 Glycuronic Ac. 

 (occ. as Gly-ates). 



All optically active are dextrorotary excepting Levulose. 



I.GLUCOSES. 



Dextrose. Dissolve a large pinch of common grape sugar in 

 a tube full of warm water, and test as follows : 



1. Trommels test. To 4 cm of the solution add 2 drops CuSO 4 

 solution, then NaOH solution, until the hydrated oxide 

 of Copper, which falls at first, is redissolved, giving a 

 a clear blue colour. Boil = a yellow pp of suboxide of 

 copper forms = Reduction. (This test is performed in 



