Fleitmann’s test

Fleitmann s Test,12 which consists in treating the substance with sodium hydroxide and aluminium foil and testing the gases evolved for arsine, is confined to the qualitative detection of arsenic. The liberated gas was formerly allowed to come into contact with silver nitrate paper, but as aluminium foil almost always contains sufficient silicon to cause... 

Estimation Gravimetrically as Sulphide as Magnesium Pyroarsenate—Volu-metrically by Iodometric Methods with Potassium Bromate, etc.—The Marsh Test—The Gutzeit Test—Fleitmann s Test—Colorimetric Methods— Microohemioal Methods—Determination of Arsenic in Gases. 

Fleitmann s test this test depends upon the fact that nascent hydrogen generated in alkaline solution, e.g. from aluminium or zinc and sodium hydroxide solution, reduces arsenic(III) compounds to arsine, but does not affect antimony compounds. A method of distinguishing arsenic and antimony compounds is thus provided. Arsenates must first be reduced to the tervalent state before applying the test. The modus operandi is as for the Gutzeit test, except that zinc or aluminium and sodium hydroxide solution... 

Fleitmann s test negative results are obtained when this is applied to antimony compounds (distinction from arsenic). 

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