The air passes in through the side tube in the flask and washes out practically 

 all of the carbon dioxid in the sample without removing appreciable quantities 

 of volatile acid. Connect the flask with the distilling bulb and place in the 

 outer flask, tube / of the outer flask being open. Make all connections tight and 

 close tube /. In the case of wines, collect about 100 cc of the distillate. In the 

 case of vinegars, from 200 to 300 cc are required. Titrate distillate with stand- 



n 



apparatus 



ard alkali free from carUfcmates using phenolphthalein as indicator and subtract 

 0.05 cc for each 100 cc <*$ ; distillate. About fifteen minutes are required for a 

 determination of volatile $icid in win^ and from thirty to forty-five minutes in 

 the case of vinegar. The volume ofMiquid in the inner flask increases but very 

 slowly during a determination. The apparatus should find a wide use in the 

 determination of volatile constituents. 

 ICir. 44] 



O 



