The Determination of Nicotin in Nicotin Solutions And Tobacco Extracts
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Silicotungstic acid does not form such insoluble precipitates with all alkaloids, as indicated by recent work of Javillier. 1 Conin, for example, which is of interest in this connection for the reason that, like nicotin, it is volatile with steam, yields no precipitate with sili- cotungstic acid at dilutions greater than 1 in 5, 000.
1 Javillier, M. Sur les silicotungstates de conlclne, de sparte'lne et d'atropine. Bulletin des Sciences Pharmacologiques, tome 17, No. 6, pp. 315-320, June, 1910....
12 DETERMINATION OF NICOTIN IN TOBACCO EXTRACTS.
In the case of some alkaloidal reagents, such as picric acid, a con- siderable quantity of the reagent must be present before any reaction is evident. Such appears not to be true of silicotungstic acid, for the present writer found that a 1 in 10, 000 solution in one-tenth per cent hydrochloric acid yields an immediate opalescence upon the addition of one drop of a two-tenths per cent nicotin solution, increased to a heavy turbidity upon the addition of more nicotin.
What to read after The Determination of Nicotin in Nicotin Solutions And Tobacco Extracts?
You can find similar books in the "Read Also" column, or choose other free books by Robert M Robert Macfarlane Chapin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Silicotungstic acid does not form such insoluble precipitates with all alkaloids, as indicated by recent work of Javillier. 1 Conin, for example, which is of interest in this connection for the reason that, like nicotin, it is volatile with steam, yields no precipitate with sili- cotungstic acid at dilutions greater than 1 in 5, 000.
1 Javillier, M. Sur les silicotungstates de conlclne, de sparte'lne et d'atropine. Bulletin des Sciences Pharmacologiques, tome 17, No. 6, pp. 315-320, June, 1910....
12 DETERMINATION OF NICOTIN IN TOBACCO EXTRACTS.
In the case of some alkaloidal reagents, such as picric acid, a con- siderable quantity of the reagent must be present before any reaction is evident. Such appears not to be true of silicotungstic acid, for the present writer found that a 1 in 10, 000 solution in one-tenth per cent hydrochloric acid yields an immediate opalescence upon the addition of one drop of a two-tenths per cent nicotin solution, increased to a heavy turbidity upon the addition of more nicotin.
What to read after The Determination of Nicotin in Nicotin Solutions And Tobacco Extracts?
You can find similar books in the "Read Also" column, or choose other free books by Robert M Robert Macfarlane Chapin to read onlineMoreLess
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