EFFECT OF ALKALI TREATMENT ON COCOAS, 11 
TABLE 6.— Water-soluble matter in alkali-treated cocoas. 
Water-soluble 
Water-soluble matter. Ash of water-soluble matter, protein Color 
(N x 6.25). | value 
J 4 per 
Alkalinity (N/ d Pitt ap 
kalinity 10 aci Tnsolu-| lution 
' No. pis per gram of cocoa). plein | G-inch 
| jae eatal Water- | Water- 1per | cell, 
if Total.| free rotein-| Lotal.| solu- | insolu- Total. | cent brew- 
t reg feats ble. ble. | Water- | Water- sul- ers 
ae solu- | insolu- | Total. phuric | Scale). 
ble. ble. | acid. 
PRC PEeLIGh PE eMce. | ence. | ber Ct. | Pen ch. Ce: Ce. Ce. | Perct. | 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. 40 7.85 | 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 | 10.99 3. 50 48.6 
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} 10.10; 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 3585) "8..90))|) LOR26 38 61.7 
22 | 32.65; 24.06] 13.80) 8.59 6. 83 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 
@ | 31.40 | 22:84} 12.39] 8.56 7.43 1.13 6.95 2.70 9.65} 10.45 1.65 59.7 
ZOMPSOntenn 2on9an | Las 2cat yd. (9 Caley 62} 10.25 2/109) 102.850) 11-566 3.15 98. 4 
2) | 33.72} 24.62) 13.62) 9.10 8. 38 S174 8. 70 2.90 | 11.60} 11.00 73 85. 2 
31 | 34.385] 26.80] 14.39; 7.55 6. 37 1.18] 10.30 2.25 | 12.55, 12.41 3. 59 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) 3a. 42)! 28. 22) )) 15:16 |}. 5.20 4.10 1.10 2. 50 3.15 5.65 | 13.06 SCL 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] 138.38] 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 3.6 
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 Seid) Wl lated tts, 4.55 73.4 
Max .| 37.02} 28.93 | 17.27 | 10.74 9. 00 2.19 | 10.45 4.40 | 12.85] 138.06 5.12 98. 4 
Min_.} 24.90] 19.58 6.66 | 4.49 3. 25 . 62 2. 50 2.00 5. 65 9.15 38 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 42 455 1.35 8.90 | 13.52 3. 45 111.9 
35 | 33.57 | 24.55] 13.92] 9.02 7. 89 1.13 (05 2. 10 9.85 | 10.63 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 P85) LOS 25 1 3. dF 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 minimum 5.71 higher, and the average 1.31 higher. Nine samples 
of alkali-treated cocoa have less than the mimimum of the untreated 
~ cocoa, 
ny 
¥ 
