Geology topics
H.I. Feinstein
Publications and source records attributed to H.I. Feinstein.
Absorption spectra of the complexes of uranium (VI) with some β-diketones
[No abstract available]
The spectrophotometric determination of vanadium as thiocyanate in acetone-water medium
A method devised for the spectrophotometric determination of vanadium in acetone-water medium is based on the reaction between vanadium (IV) and thiocyanate. Within the concentration limits tested, Beers law is obeyed. This method is not as sensitive as the peroxide method, but the vanadium(IV)-thiocyanate reaction product shows greater absorbancy than the blue vanadyl ion. In the absence of interfering elements, the method can be used in place of the volumetric procedure for the determination of macro quantities of vanadium.
The spectrophotometric determination of uranium by means of the azide ion
A method has been devised for the spectrophotometric determination of uranium by means of the azide ion. The method possesses several advantages over the various thiocyanate procedures. It has a slightly higher sensitivity, an aqueous medium is used, and the reaction product is more stable. Within the concentration limits tested, Beer's law is obeyed.
The absorption spectra of the complexes of uranium (VI) with some β-diketones
The absorption spectra of the complexes of uranium (VI) with four β-dike tones were determined under various conditions of pH, concentration of uranium, and alcohol concentration. Under optimum conditions, the maximum molar absorptivity (31,200) is obtained using 2-furoyltrifluoroacetone. This compares with about 4,000 and 19,000 for the thiocyanate and dibenzoylmethane complexes, respectively.
The spectrophotometric determination of vanadium as thiocyanate in acetone-water medium
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The spectrophotometric determination of uranium by means of the azide ion
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The determination of uranium in ores: separation by ethyl acetate extraction and spectrophotometric determination by the thiocyanate method in acetone-water medium
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