The Manufacture of Chocolate and other Cacao Preparations

by Paul Zipperer

[172] Ztschr. für öffentl. Chemie 1900, page 481.

[173] Ibid. 1900, pages 86 et seq.

[174] Arbeiten aus dem Kaiserl. Gesundh.-Amt 1904, page 20.

[175] Ztschr. f. öffentl. Chemie 1907, page 308.

[176] Forschungsberichte über Lebensmittel etc. 1896, III page 275, also Beckurt’s Jahresbericht der Pharmazie 1896, page 746.

[177] Ztschr. f. anal. Ch. vol. 3, page 233.

[178] Ztschr. f. anal. Ch., vol. 19, page 246.

[179] Journal of Society for Chem. Research 1899, page 556.

[180] The solubility of caffeine in carbon tetrachloride is said by Eminger to be 1:100, but Scherr maintains that a much larger quantity is required.

[181] Merck’s Catalogue of Reacting Agents (2^nd. Edition, page 88) gives a convenient method of determining the presence of theobromine and caffeine (Gerard’s reaction). We annex an extract.