EXAMINATION OF FROZEN EGG PRODUCTS. 

 METHODS OF EXAMINATION OF SAMPLES. 



METHODS TESTED. 



77 



In the course of the preliminary preparation and examination of 

 samples in the laboratories numerous questions arose concerning the 

 details of the analytical methods. During the examination of sam- 

 ples prepared in egg-breaking plants, and subsequently, experiments 

 were performed to settle these questions, a short discussion of which 

 would seem proper at this place, to save the time of chemists who, not 

 knowing that such experiments had already been made, might again 

 cover the same ground. 



Use of Sand in the Determination op Total Solids. 



One of the analysts who tried this procedure in his preliminary work 

 reported that he considered the use of sand an improvement, in that 

 the drying period was generally shortened, the final results being the 

 same with sand and without, in the case of whole egg. With yolk, 

 the results were invariably found to be higher when no sand was used, 

 presumably due to incomplete drying. With white, the results were 

 reported as inconclusive. It was noted that due to other demands on 

 the suction pump, the average vacuum was only 22 inches, which is 

 believed to be the explanation for the difficulty with yolk. 



Table 27. — Percentage of total solids obtained when sample is dried with and without sand. 













Whole egg. 





Sample No. 





Dried with 10 

 grams sand in 

 3-inch lead dish. 



Dried without 



sand in 3- inch 



lead dish. 





A. 



B. 



A. 



B. 



3972 



Per cent. 

 26.98 

 26.04 

 26.27 

 26.61 

 26.52 



Per cent. 

 26.86 

 26.14 

 26.12 

 26.75 

 26.45 



Per cent. 

 27.00 

 26.12 

 26.35 

 26.80 

 26.56 



Per cent. 

 27.01 



3973 



26.26 



3974 ; 



26.39 



3975 



26.78 



4476 



26. 56 



















26.47 



26.58 









Yolk. 



White. 



Sample No. 



Dried with 5-10 

 grams sand in 

 3-inch lead dish. 



Dried without 



sand in 3-inch 



lead dish. 



Dried with 5-10 



grams sand in 



3-inch lead dish. 



Dried without 



sand in 3-inch 



lead dish. 





A. 



B. 



A. 



B. 



A. 



B. 



A. 



B. 



4477 



Per cent. 

 50.49 

 50.82 

 50.52 

 50.13 

 50.51 



Per cent. 

 50.46 

 50.90 

 50.58 

 49.90 

 50.45 



Per cent. 

 50.78 

 50.99 

 50.79 

 50.51 

 50.81 



Per cent. 

 50.76 

 50.91 

 50.79 

 50.42 

 51.03 



Per cent. 

 12.78 

 12.35 

 12.79 

 12.04 

 12.56 



Per cent. 

 12.93 

 12.29 

 12.85 

 12.04 

 12.53 



Per cent. 

 12.78 

 12.36 

 12.82 

 12.26 

 12.83 



Per cent. 



4478 



12.36 



4479 



12. S3 



4480 



12.22 



4481 



12.85 





















Average 



50.48 



50.7S 



12.52 



12.60 



