102 



Sanitary Studies of Baking Powders 



TABLE 4 



Comparative results of the analysis of fresh dog hlood, as such and after the 

 addition of AL(S0i)3, expressed as milligrams of AIPO^ 



A. O. A. C. (Steel) Method 



Schmidt-Hoagland Method 



TABLE 5* 



Comparative data pertaining to the weights of AIPO*, in milligrams, obtained 

 from dried goat blood to which Ah(S0i)3 had been addcd 



* The large discrepancy between the amount of aluminum added and that 

 found indicates the presence of aluminum in the original sample of blood. A 

 smaller sample of blood was used in the case of the second set of determina- 

 tions. A second sample of dried goat blood was obtained from the same dealer 

 and analyzed for aluminum according to the method of Schmidt and Hoagland. 

 The following results were obtained (percent of aluminum, as phosphate) : 

 0.056, 0.057, 0.062, 0.051, 0.056, 0.058 (average 0.055). This sample, like the one 

 used in studying the methods of analysis, had been specially ground. Extraneous 

 material obtained from the powder, by passing it through a loo-mesh sieve, 

 suggests that the aluminum found resulted from contamination. 



