Radiochemistry of Arsenic, by Harold C. Beard (1960) / Chapter Skim
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Review of the chemistry of arsenic of interest to radiochemists
Review of the chemistry of arsenic of interest to radiochemists
Pages 19-22
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From page 19... ...
Arsine is decomposed in the well-known Marsh test by heating in a small glass tube, with the resulting deposition of a black arsenic metal "mirror" on the walls of the tube. Another familiar test, the Gutzeit method, utilises the reaction of arsine with a test paper impregnated with mercuric chloride or bromide, which gives a brown coloration.
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From page 20... ...
They strongly resemble the corresponding phosphates in solubility and crystal form, many phosphate-arsenate pairs being isomorphous. Only the alkali-metal tertiary orthoarsenates are soluble in water so quantitative precipitation is possible with the silver ion, magnesia mixture, and with ammonium molybdate in nitric acid.
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From page 21... ...
Elementary arsenic is then precipitated by adding ammonium hypophosphite and boiling. Selenium and tellurium can be prevented from reaching the silver nitrate solution by passing the arsine through 10% lead acetate solution first.
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From page 22... ...
(11) Good separation of tracer arsenic from gramme quantities of germanium has also been achieved by reversed phase partition chromatography using HC1 elution with TBP as stationary phase.
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