CO129-466 - Individuals - 1920 — Page 29

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present also when making colorimetric determinations Colouring matter can be removed by lead acetatest of an astrone aced solution of charcoal, if

The final

the

or by means of c

is coloured. The method has the advantage of being also a good test for the identification of morphine, It was supplemented in these experiments by the ferric chloride and potassium ferricyanide test.

monia, was

The other half of the mixture containing morphine, pyridine bases, and ammonia, then examined direct for morphine by shaking out with amyl alcohol and estimating as before, Thus the alkaloid was determined in duplicate as a knowledge of the amount of this substance in ofuum smoke is of considerable importance. Although the third bottle of acid absorbent. contained no alkaloid, it was resolved to ascertains the amounts of pyridine bases and ammones in order to see how effectural the absorption had been From the results it will be seen that the amounts so obtained were very.

small.

The hydrocyonic acid in the two bottles of alkaline absorbent was distilled after acidification ints of sodium hydrate solution and determined volumetrically by & silver nitrate solution.

The following were the results calculated in percentages the original extract: 1. Carbon monoxide - none.

in

0-37~~

–

2. The pyridine bases calculated as pyridine

amounted to 0.139 gram, to which must be added 0.008 gram resulting from estimation of the contents of the third bottle

the