DISTILLED LIQUORS. 101 



13. Detection of Coloring Matter. Provisional. 



In general proceed as directed under " XXVIII. Coloring Matter," page 190. 

 (a) CBAMPTON AND SIMONS TKST FOR CARAMKI.. 



This method depends on the insolubility of caramel In ether. Evaporate 

 60 cc of the sample nearly to dryness on the water bath, wash into a 50 cc 

 add 25 cc of absolute alcohol, cool to a definite temperature, and dilute 

 to mark with water. Transfer 25 cc to an apparatus of the general description 

 of HromweH's fusel-oil apparatus (p. 97), but graduated so that the lower 

 bulb holds 25 cc to a definite mark on the stem, which may be of larger bore 

 than in Bromwell's apparatus. Add 50 cc of ether and shake at intervals for 

 half an hour, let settle, and siphon water through the lower tube until the 

 aqueous layer reaches the 25 cc mark. Mix the whole, remove the aqueous 

 rr, and compare with the 25 cc of the solution which were not treated with 

 ether. Express the amount of color removed on percentage basis. 



(&) AMTHOR TEST MODIFIED BY LASOHE.& PROVISIONAL. 



Add 10 cc of paraldehyde to 5 cc of the sample contained in a test tube and 

 shake. Add absolute alcohol, a few drops at a time, shaking after each addi- 

 tion until the mixture becomes clear. Allow to stand. Turbidity after ten 

 minutes is an indication of caramel. 



J. Amer. Chem. Soc., 1890, 22 : 810. 6 The Brewer Distiller, May, 1903. 



