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Related article: 173.8
14835
1 14.2
14780
Pharm. Joum. and Pharmacist, Jan. 15, 19 10, 50.
Edible Oils Detection of Oils Extracted by Carbon Bisulphide. U,
Curson published the following method by which the adulteration of edible
oils with oils extracted by carbon disulphide, although not of frequent oc-
currence, may be detected : About 200 Gm. of the oil to be tested is
weighed into a flask along with 50 Gm. of 90 per-cent. alcohol ; after vig-
orously shaking the mixture, the flask is attached to a condenser, and dis-
tillation conducted gently on a water- bath. The distillate is collected in
a small receiver immersed in cold water and containing a few Cc. of al-
cohol in which a little potassium hydroxide is dissolved. The traces of
carbon disulphide carried over in the distillate, form, with the alkali, potas-
sium xanthate. The distillation Uk Kamagra is stopped Uk Kamagra when about Uk Kamagra one- third of the al-
cohol has distilled over. To the distillate is added, by drops, sufficient
acetic acid to render the liquid just slightly acid, and then a few
drops of an alcoholic solution of copper acetate. If potassium xanthate
has been formed in the receiver, there is formed at first a yellow colora-
tion and then, shortly afterwards, a precipitate of copper xanthate, of the
same color. If the oil examined contains no adulteration of the kind re-
ferred to Uk Kamagra there is no coloration produced. Pharm. Joum. and Pharmacist,
Oct. 9, 1909, 451 ; from Annal. des Falsificat., Sept., 1909, 409.
Fats Effect of Exposure to Cold, H. Wagner and T. Bohrisch have
studied the effect of cold upon fats, with particular consideration of the
chemical changes possibly resulting from exposure to freezing tempera-
tures. As a result of their studies they find that such exposure is practi-
cally without effect upon the chemical constants of fats,^the changes oc-
Digitized by VjOOQ IC
EXPRESSED OIL OF BLACK MUSTARD. 34I
curring at freezing temperatures being quite insignificant and purely of a
physical nature. Pharm. Ztg., liv (1909) No. 102, 1005; from Ztschr.
f. Nabr. u. Genussm., 1909, No. 18.
Fixed Oils Influence of Temperature on their Stability, A series of
experiments on the preservation of olive and almond oils at different
temperatures and in different kinds of containers led L. ?. Walbaum to
the conclusion that in cold countries in which the temperature does not
ordinarily exceed 20

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