Poisons, Their Effects and Detection

Note 794 — PART IX.—INORGANIC POISONS. (continued 2)

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Dragendorff asserts to the contrary; but we may quote the authority of Taylor, who has made several experiments, in which he obtained all the arsenic as chloride. The writer has performed the process many times, each time carefully testing the mass in the retort for arsenic; but the result proved that it had entirely passed over.

[795] Principles of Medical Jurisprudence, vol. i. p. 267.

[796] Zeitschr. f. anal. Chem., xiv. pp. 250-281.

[797] Selmi (Atti dell. Accademia dei Lincei, Fasc. ii., 1879) proposed a modification of Schneider’s process. The substances are treated with hot, pure sulphuric acid, and at the same time the liquid is traversed by a stream of hydrochloric acid gas. The resulting distillate is tested for arsenic by Marsh’s process. Selmi states that, operating in this way, he has detected ¹⁄₄₀₀ of a mgrm. of As₂O₃ in 100 grms. of animal matter.

[798] Scheidung u. Bestimmung d. Arsens; Liebig’s Annalen d. Chemie, Bd. ccvii. p. 182.

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