XX] FLAVORING EXTRACTS 269 



In the case of wintergreen, use as a floating medium a mixture of 1 volume of con- 

 centrated sulphuric acid and 3 of saturated sodium sulphate solution. 



METHYL SALICYLATE IN WINTERGREEN EXTRACT. 



55 Hortvet and West Method'^ Modified. — Tentative. 



Mix 10 cc. of the extract with 10 cc. of 10% potassium hydroxid solution. Heat 

 on the steam bath until the volume is reduced about one half, add a distinct excess 

 of hydrochloric acid (1 to 1), cool and extract with 3 portions of ether, 40, 30 and 

 20 cc, respectively. Filter the extract through a dry filter into a weighed dish, wash 

 the paper with 10 cc. of ether and allow the filtrate and washings to evaporate spon- 

 taneously. Dry in a desiccator containing sulphuric acid and weigh. Multiply 

 the weight of salicylic acid so found by 9.33 to obtain the per cent by volume of 

 wintergreen oil in the sample. 



ANISE AND NUTMEG EXTRACTS. 

 OIL. 



56 Hortvet and West Method^.— Tentative. 



To 10 cc. of the extract in a Babcock milk bottle add 1 cc. of hydrochloric acid 

 (1 to 1), then sufficient half saturated salt solution, previously heated to 60°C., to 

 fill the flask nearly to the neck. Cork and let stand in water at 60°C. for about 15 

 minutes, rotate occasionally and centrifugalize for 10 minutes at about 800 revo- 

 lutions per minute. Add brine till the oil rises into the neck of the bottle, and again 

 centrifugalize for 10 minutes. If the separation is not satisfactory, or the liquid is 

 not clear, cool to about 10°C. and centrifugalize for an additional 10 minutes. 

 Multiply the reading by 2 to obtain the percentage of oil by volume. 



BIBLIOGRAPHY. 



1 J. Am. Chem. Soc, 1899, 21: 256; 1902, 24: 1128; 1905, 27: 719. 



2 U. S. Bur. Chem. Bull. 132, p. 109. 



3 Ibid., 152, p. 146. 



* J. Am. Chem. Soc, 1906, 28: 1472. 



5 U. S. Bur. Chem. Bull. 132, p. 102. 



« Ibid., 137, p. 72. 



^ Schimmel and Co. Semi-annual Report. Oct. 1898, p. 41. 



8 U. S. Bur. Chem. Circ 46, p. 9. 



9 J. Ind. Eng. Chem., 1909, 1: 84. 

 i«Ibid., 1911, 3:252. 



