EFFECT OF ALKALI TREATMENT ON COCOAS. 3 
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DESCRIPTION OF INVESTIGATIONAL SAMPLES. 
Practically all samples analyzed in this nvestigation were obtained 
directly from the manufacturer, the kind and percentage of alkali 
employed being known in nearly every case. As far as possible, 
samples were obtained from the same manufacturer of both treated 
and untreated cocoas made from the same blend of beans, ascer- 
taining where possible what beans were used in the blend. The 
samples taken represent the products of a large majority of the 
manufacturers of so-called ‘‘Dutch process’”’ cocoa in this country, 
and also four of the most popular foreign brands. In addition to 
these, samples were taken of plain cocoas manufactured by those 
concerns which made no ‘‘Dutch process’’ cocoa, for the purpose of 
determining the constants of a plain cocoa which could by no means 
be contamimated with a ‘‘Dutched’’ cocoa. Moisture and fat de- 
_ terminations were made on each sample so that all other determina- 
tions could be calculated to a moisture and fat free basis and the 
results made comparable. Table 1 gives the number of each sample, 
the variety of bean, the kind and percentage of alkali, and the 
amount of moisture and fat. Moisture was determined by drying at 
the temperature of boiling water for four hours. The fat was deter- 
mined by extracting the sample in a Knorr extractor with anhydrous 
ether for four hours. 
TABLE |1.—Description of samples. 
Blend. Kind and percentage of alkali. Moisture. Fat. 
Per cent. | Per cent. 
Soe ceeg od cee ee ws ne ee eee MERE Abed eases Stee ee, aes. wages 4.07 17. 81 
SAITOH empresa 2.5 per cent potassium carbonate. -.... 2. 34 18. 98 
Accra, Bahia, Guyaquil............- WLeatMb rea te dey seen ese aes ese 4,31 18.45 
INEGI SEONG a¥eyAa8 Uo Sa ee pe 3 per cent potassium carbonate. .....-. 1.98 21.15 
Ciyaquil Bahiaeess bao cs ci ss cee 2.5 per cent potassium carbonate-..... 2.47 23. 56 
Beet AMO lear aie 25275 2 CS Uo DCE CEE 0.32 per cent ammonium carbonate, 4.40 20. 65 
1.65 per cent potassium bicarbonate, 
0.15 per cent sodium bicarbonate. 
SANCHEZ LGV ACW. oe sce 2.84 per cent sodium bicarbonate... ... B78} 20. 90 
Guyaquil, Sanchez, La Guaira, | 2 per cent potassium bicarbonate, 1 3.49 | - 20.23 
Bahia. per cent ammonium carbonate. 
Trinidad, La Guaira, Bahia, San | 0.663 per cent potassium carbonate, 3. 49 18. 22 
Thome. o.28 per cent ammonium carbo- 
nate. 
Bahia, Arriba, Trinidad, Porto Ca- | 2 per cent potassium bicarbonate, 1 3. 94 19. 20 
bello, Maracaibo, Ceylon. per cent ammonium carbonate. 
ac scesee ce cSCe HE See ee 2.5 per cent potassium carbonatfe....-. 2.92 25. 28 
= OC CRE GUO B EDO OG OE eUASCOE na SA aea aes Peer CLG) Bese S epelee ees ie ate ee a ent 3. 03 17. 90 
Re een no Se nes gee <4 = WHIT Caled acon sen enone ene 3. 78 16. 62 
RS a pees i saee i aeles de See 2 Wiatern treated ss. ssfacteccsscteeeccmes 3. 07 20. 12 
DaMCIASE Em eee Pema lee 2.5 per cent potassium carbonate, 10 3. 19 25. 48 
per cent water. 
SRN ECIMste 3 bs Coe eee 1.5 per cent potassium carbonate, 1.5 4.55 20. 68 
per cent sodium carbonate. 
_ dd ce SVS ER ORE RE Sodiumicarbonatey- 45-25-25 skeee nee 2. 74 22. 37 
sede decide 36 boos Pepe a eS ee ere CLO a eR ye ers GO Sa aie ae ae 2. 60 21.18 
Panchez, Memidad’s..- sey jocce se oe Wntreateds: 25s) 2k ce eee eee 3. 62 21. 28 
| See Ghee sob seep nesses eee ee 2.5 per cent sodium carbonate-...-.... 2. 50 Ze 
soncde eS nce eee SE re aE sie are 2 per cent sodium carbonate..........- 2. 81 2352 
See ee es on tS 2 Se 2 a 1 per cent potassium carbonate. ...-.--- 1.95 20. 68 
SIMO ASIA Deen ie neh oe Bee kote 8 (Untreated ee eet ee oe deen ea 2.65 15. 89 
Fe ee a ore is nse Seta Ce bee de lest os 1 per cent potassium carbonate. ....--. 1. 80 18. 84 
Sa PUMP ee Soi eae = ese NEP ie So lWintreatedeeee ne tee nee ete. 4.30 PPT 
SETIDGG UES 7 aeC Ee 6 aan ene nan 4 per cent ammonium carbonate... .-.! 4.78 20.18 
” "ooo cbetetceeaee eee BHermentation procesSz-a-2 +. sce ss ce eee 3. 83 28. 35 
ES alii Somer tae eters dees. dicijn~ 1 per cent potassium carbonate......-.) 4.38 17. 42 
