APPENDIX. 



ANALYTICAL TABLES. 



(OUTLINE OF METHOD FOB DETECTION OF VARIOUS PHYSIOLOGICAL CHEMICAL 

 SUBSTANCES IN A MIXTURE.) 



The following Physical Properties should be noted : 

 I. Appearance. 



A. Powder. Dust some on to a slide and examine under the 



microscope for starch grains and crystals. Dissolve some in 

 a suitable solvent. 



B. Solution. 



1. Opaque may be due to : 



(a) suspended fat globules clear up with ether ; 



(b) certain inorganic salts clear up with mineral acid ; 



(c) certain proteids. 



2. Opalescent may be due to : 



(a) glycogen or starch iodine reaction ; 



(b) certain proteids. 



3. Deeply coloured suspect blood. 

 II. Eeaction. 



A. Acid may be due to : 

 (a) free acid 



If due to free acid, ascertain whether this be 



1. a mineral acid or \apply Gunsberg's and the tropaeolin 



2. an organic acid / test. 



If due to an organic acid, apply Uffelmann's test for lactic acid. 

 B. Alkaline test for carbonic acid (effervescence with mineral acid)> 

 ammonia (smell, etc.), caustic alkali. 



