2g2 



Reduction of copper solution is effected by 

 bile pigments. Reduction occurs also in patients 

 taking salicylic acid, sulphonal, and quinine 

 (Simon), so that it may be necessary to use — ■ 



1. Fermentation Test or 



2. Phenyl- Hydrazine Test. — Take a pinch 

 of^pure^phenyl-hydrazine, ten drops glacial acetic 

 acid, one c.c. of a saturated solution of common 



Fig. 64. Spectra af (i; Haeviatoporphyrin {in Acid Solution); 



(2) H aematoporphyrin in Alkaline Solution ; (3) in Neutral 



Solution; (4) Haematopovphyrin (urate-sediments) 



