The Use of a Mercury Cathode in Electrochemical Analysis.

Smith, Edgar F.

doi:10.1021/ja02011a001

Cited by 13 publications

(13 citation statements)

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“…1-45 Mesh Uranium Gloss Tungsten Wire Figure washing the cell, the anode was fragile, and some danger existed of igniting the evoLved hydrogen if the two electrodes accidentally touched. Another type tested consisted of a tall cell with a sealed-in horizontal platinum gauze anode, similar to the cells described by Melaven (9) and Smith (11). A two-way stopcock at the bottom of the cell permitted removal and replenishment of the mercury cathode and withdrawal of the sample solution.…”

Section: Pt Gauzementioning

confidence: 99%

Unitized Mercury Cathode Apparatus for Electrolytic Removal of Metals

Johnson¹,

Weaver²

1947

Anal. Chem.

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A convenient dual unitized apparatus is described for rapid electrolytic removal of heavy metals from solutions of reactive elements, such as alkali metals, alkaline earth metals, and aluminum, using a mercury ca thode of new design. The apparatus consists of a self-contained immersion electrode assembly coupled to a high-capacity Tungar rectifier and a suitable control panel. It allows convenient, efficient use.with high current densities, permits easy washing of the electrode assembly without re-solu-THE removal of interfering metals prior to the determination of other elements offers numerous difficulties. If precipitation of the undesirable elements is to be employed, it is necessary to anticipate occlusion and to choose a suitable method or reagent that will not introduce interfering elements. It is often difficult to obtain reagents sufficiently free from the element to be determined; sometimes, subsequent removal of excess reagent offers additional difficulties. By contrast, electrolysis with the mercury cathode ( 7) eliminates virtually all these problems when applicable. With suitable apparatus it is generally possible to perform the electrolysis in a fraction of the time required for most chemical separations, leaving a dilute acid solution almost completely free of metallic elements.According to Lundell and Hoffman (8), the metals which-are quantitatively deposited in the mercury cathode are: chromium, iron, cobalt, nickel, copper, zinc, gallium, germanium, molybdenum, rhodium, palladium, silver, cadmium, iridium, tin, rhenium, indium, platinum, gold, mercury, thallium, bismuth, and polonium. Other elements which are completely removed from solution but not quantitatively deposited in the mercury are osmium, which is partially volatilized as the tetroxide at the anode, selenium and tellurium, which are reduced to the elemental state but remain unamalgamated, load, which may be partially deposited on the anode, and arsenic,

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Section: Pt Gauzementioning

confidence: 99%

Unitized Mercury Cathode Apparatus for Electrolytic Removal of Metals

Johnson¹,

Weaver²

1947

Anal. Chem.

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“…first used the mercury cathode. Smith (15) applied this method to the determination of zinc and later showed that it was possible to separate quantitatively iron, cobalt, nickel, zinc, cadmium, and copper from the respective sulfate solutions (14). Kimlev (10) showed that accurate determinations of copper and zinc could be made in this way, but Price (13) stated that the results obtained with zinc were low.…”

Section: Review Of Literature On Mercury Cathodementioning

confidence: 99%

“…Drown and McKenna ( 6) separated iron and aluminum by this method and Smith (16) showed that chromium would also form an amalgam. Meyers (12) separated chromium from aluminum and molybdenum from vanadium, and Smith (15) quantitatively removed iron from titanium, uranium, zirconium, and thorium solutions.…”

Section: Review Of Literature On Mercury Cathodementioning

confidence: 99%

Determination of Aluminum and Magnesium in Zinc-Base Die-Casting Alloys

Craighead¹

1930

Ind. Eng. Chem. Anal. Ed.

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“…In 1903 there appeared a paper by Edgar F. Smith entitled "On the Uses of a Mercury Cathode in Electrochemical Analysis" (153); it described his work on both the determination of various anions and the separation and determination of metallic cations. This was the first of many papers published on this subject by Smith and his students, who greatly enlarged the field of application of the mercury cathode and at the same time modified and improved the apparatus.…”

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confidence: 99%