EFFECT OF ALKALI TREATMENT ON COCOAS. 11 



Table 6. — Water-soluble, mailer in, alkali-lreaU'd cocoon. 























Water-soluble 







Water-solublo matter. 





Ash of water-solublo matter. 





prof 

 (Nx 





Color 























6.2.",;. 





























a per 





























No. 







Ash- 

 and 

 protein- 

 free. 









Alkalinity (N/10 acid 

 per gram of cocoa). 





Insolu- 

 ble in 



lution 



( {-inch 





Total. 



Ash- 

 free. 



Total. 



Water- 

 solu- 



Water- 

 insolu- 









Total. 



lpcr 



cent 



cell, 











brew- 









ble. 



ble. 



Water- 



Water- 







sul- 



er's 















solu- 



insolu- 



Total. 





phuric 



scale). 

















ble. 



ble. 







acid. 







P.ct. 



Per ct. 



Per ct. 



Per ct. 



Per ct. 



Per ct. 



Cc. 



Cc. 



Cc. 



Per ct. 



Per ct. 



Degrees. 



4 



28.17 



19. 58 



6.66 



8.59 



7.17 



1.42 



6.00 



2.50 



8.50 



12.92 



5.12 



67.4 



2 



29.59 



22.61 



10.36 



6.98 



4.79 



2.19 



4.45 



3.4,1 



7.8.5 



12. 25 



3. 25 



53.4 



5 



29.12 



21.05 



10. 15 



8.07 



6.07 



2.00 



6.50 



3.20 



9.70 



10.90 



3. 50 





11 



31.10 



22.17 



10.83 



8.93 



7.88 



1.05 



6.90 



2.40 



9.30 



11.34 



2. 30 



59. 9 



12 



31.27 



23.67 



12.31 



8.60 



7.63 



.97 



6.75 



2.90 



9.65 



11.36 



2.67 



49.3 



15 



37.02 



27.22 



15.53 



9.80 



9.00 



.80 



8.00 



2.10 



in. ]o 



11.29 



.79 



70.0 



28 



33. 50 



25. 89 



12.86 



7.61 



6. 53 



1.08 



5.00 



3.05 



8.05 



13. 03 



2.32 



81.8 



24 



32.74 



24. 86 



14.60 



7.88 



6. 02 



1.86 



4.70 



3. 85 



8.55 



10.26 



.38 



61.7 



22 



32. 65 



24.06 



13.80 



8.59 



6. S3 



1.76 



5.35 



3.75 



9.10 



10.26 



.94 



67.3 



33 



31.26 



24.76 



13.76 



6.50 



5.12 



1.38 



6.80 



2.00 



8.80 



11.00 



1.21 



81.4 



7 



31.40 



22.84 



12.39 



S. 56 



7.43 



1.13 



6.95 



2.70 



9.65 



10. 45 



1.65 



59.7 



20 



36. 72 



28.93 



17.27 



7.79 



7.17 



.62 



10.25 



2.10 



12. 35 



11.66 



3. 15 



98.4 



21 



33. 72 



24.62 



13. 62 



9.10 



8.38 



.72 



8.70 



2.90 



11.60 



11.00 



.73 



85.2 



31 



34.35 



26.80 



14. 39 



7.55 



6.37 



1.18 



10.30 



2.25 



12. 55 



12.41 



3.55 



76.2 



18 



34. 48 



27.11 



15.73 



7.37 



6.53 



.84 



9.05 



2.52 



11. 55 



11.38 



1.72 



85.3 



17 



35.93 



27.76 



15. 53 



8.17 



6.77 



1.40 



8.80 



2.55 



11. 35 



12.23 



2.79 



86.8 



26 



33. 42 



28. 22 



15.16 



5.20 



4.10 



1.10 



2.50 



3.15 



5.65 



13.06 



1.77 



68.0 



50 



24.90 



20.15 



10.49 



4.75 



3.25 



1.50 



3.65 



4.40 



8.05 



9.66 



1.05 



49.2 



8 



32.09 



24.46 



13.38 



7.63 



6.69 



.94 



5.85 



3.15 



9.00 



11.08 



1.63 



47.2 



10 



34.38 



26.57 



14.13 



7.81 



6.51 



1.30 



4.25 



3.70 



7.95 



12.44 



1.48 



29.3 



16 



36.00 



25.26 



12.26 



10.74 



. 8.77 



1.97 



10.45 



2.40 



12. 85 



13. 00 



3.54 



93.6 



9 



33.94 



26.60 



14.59 



7.34 



5.83 



1.51 



5.10 



3.65 



8.75 



12.01 



1.37 



25.5 



52 



30.54 



26. 05 



14.61 



4.49 



3.56 



.93 



4.60 



2.85 



7.45 



11.44 



1.83 



75.8 



53 



33.15 



28.26 



15.98 



4.89 



3.94 



.95 



5.00 



2.60 



7.60 



12.28 



1.22 



69.0 



46 



28.82 



23.80 



12. 30 



5.02 



3.79 



1.23 



3.95 



3.45 



7.40 



11.50 



2.19 



45.4 



49 



29.68 



23. 10 



13. 95 



6.58 



5.05 



1.53 



4.50 



3.45 



8.05 



9.15 



.89 



36.3 



6 



28.34 



20.31 



9.16 



8.03 



6.67 



1.36 



6.50 



2.20 



8.70 



11.15 



4.55 



73.4 



Max . 



37.02 



28.93 



17.27 



10.74 



9.00 



2.19 



10.45 



4.40 



12. 85 



13.06 



5.12 



9?. 4 



Min.. 



24.90 



19. 58 



6.66 



4.49 



3.25 



.62 



2.50 



2.00 



5.65 



9.15 



.3S 



25.5 



Avg.. 



32.16 



24.66 



13.16 



7.50 



6.22 



1.38 



6.33 



2.93 



9.26 



11.50 



2.13 



64.7 



34 



39.22 



32.38 



18.86 



6.84 



6.42 



.42 



7.55 



1.35 



8.90 



13.52 



3.45 



111.9 



35 



33.57 



24.55 



13.92 



9.02 



7.89 



1.13 



7.75 



2.10 



9.85 



1C.63 



2.19 



107.5 



37 



42.01 



33.68 



17.81 



8.33 



7.58 



.75 



7.15 



2.45 



9.60 



15.87 



4.83 



114.7 



38 



38.79 



30.93 



15.78 



7.86 



7.43 



.43 



8.40 



1.85 



10. 25 



15.15 



3.35 



101.9 



These figures show that treatment with alkali does not increase 

 the solubility of the cocoa material, but rather diminishes this solu- 

 bility. Inasmuch as it was to be expected that treatment with alkali 

 would increase the solubility of the protein and this expectation is 

 borne out by the results obtained, the decrease in solubility must be 

 due to the fact that the presence of the alkali has an inhibitory action 

 on the solution of some of the nonnitrogenous substances. This is 

 plainly shown in the third column of Tables 5 and 6, where the total 

 solids less the protein and ash are calculated. Here the untreated 

 cocoas range from 12.37 to 18.94 per cent, with an average of 14.47 

 per cent, while the treated cocoas range from 6.66 to 17.27 per cent, 

 with an average of 13.16 per cent, the maximum percentage for 

 untreated cocoa being 1.67 higher than that for the treated cocoa, 

 the miniinum 5.71 higher, and the average 1.31 higher. Nine samples 

 of alkali-treated cocoa have less than the minimum of the untreated 

 cocoa. 



