A Polarographic Study of Mercuric Cyanide and the Stability of Cyanomercuriate Ions¹

Abstract

tion of the dismutation products of the activated complex with hydrogen ions. Lemont, Illinois

Simultaneous determination of free sulfide and cyanide by ion chromatography with electrochemical detection

“…Cyclic voltammograms of sulfide and cyanide (Figure 2) at stationary mercury electrodes show well-defined responses in sodium hydroxide as expected (13). The electorde processes at mercury have been well studied (12,13,(30)(31)(32) and can be represented as Hg + nCN" -Hg(CN)" + ne" = 2-4…”

Mercury. Thermodynamic properties, chemical equilibriums, and standard potentials

“…168 The second, third, and fourth constants are in reasonable agreement with polarographic results (µ = 2.0 M and 30°C) of Newman, Cabral, and Hume. 169 There have been several claims170 concerning complex ions such as Hg(CN)n2-n(aq) with > 4, but it now appears certain from the spectroscopic work of Ashurst, Finkelstein, and Goold171 that these earlier reports are mistaken.…”

Polarographic Behavior of Silver in Cyanide Solutions.

“…Tanaka and Murayama's results also show that, at pH values higher than the pKa of hydrocyanic acid, the higher complexes of mercury become important in the electrochemical reactions, and Equations 1 and 2 are no longer obeyed. The cathodic counterpart of this anodic process, the reduction of mercuric cyanide, has been studied by Tomes (12) and by Newman, Cabral, and Hume (10). The wave obeys the equation, Ed.,.…”

“…Further addition caused a decrease in the intensity of fluorescence. This was the amount of acid selected for use in the procedure.The specificity of this reaction for urea has been discussed in previous publications (2,10,12). These authors show that contribution by similar compounds such as uric acid, etc., is relatively insignificant due to their minute presence in these samples.A preliminary effort to adapt this procedure to the Coleman Model 12C photofluorometer has thus far proved unsuccessful.…”

“…The specificity of this reaction for urea has been discussed in previous publications (2,10,12). These authors show that contribution by similar compounds such as uric acid, etc., is relatively insignificant due to their minute presence in these samples.…”