Coulometric Titrations with Electrolytically Generated Mercury(I and II)

Przybylowicz, E.P.; Rogers, L. B.

doi:10.1021/ac60113a006

Cited by 21 publications

(12 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This accuracy compares favorably with the results of Praybylowica and Rogers (21) for quantities comparable to the number of moles of halide contained in the thin layer volume element.…”

Section: Halide Ions and Halide Mixturessupporting

confidence: 80%

“…The data of Table I1 indicate the existence of serious interferences in the thin layer potential scan coulometry of halide mixtures at the mercury-coated platinum electrode. The least interference (see Figure 2) is observed in the determination of I-in mixtures, where distinctly less error was observed than reported by Przybylowica and Rogers (21) in a more conventional coulometric titration procedure.…”

Section: Halide Ions and Halide Mixturesmentioning

confidence: 52%

“…Also, electrogenerated mercurous ion has been used (9,21) to determine macro and micro amounts of halide ions. Thin layer coulometry is applied here to solutions of the halide ions and halide mixtures, precipitating the corresponding mercurous salts at the mercurycoated platinum electrode.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Thin Layer Potential Scan Coulometry. Determination of Metal Ions and of Halide Ions Using a Mercury-Coated Platinum Electrode.

Oglesby¹,

Anderson²,

McDuffie³

et al. 1965

Anal. Chem.

View full text Add to dashboard Cite

A linear ramp potential excitation was applied to a thin layer electrolysis cell containing a solution of several electroactive substances. The integral of the current response constitutes a coulometric titration of the electroactive species present. The technique, potential scan coulometry, has been evaluated by electrolysis of solutions of copper, lead, cadmium, and zinc ions in a 1M KNO, medium and precipitation of I-, Br-, and CI-ions with mercurous ion electrogenerated from a mercury-coated platinum electrode. The technique appears to be particularly suited to rapid analysis of mixtures and of very small amounts of electroactive substance.EVERAL

show abstract

“…This accuracy compares favorably with the results of Praybylowica and Rogers (21) for quantities comparable to the number of moles of halide contained in the thin layer volume element.…”

Section: Halide Ions and Halide Mixturessupporting

confidence: 80%

Section: Halide Ions and Halide Mixturesmentioning

confidence: 52%

See 1 more Smart Citation

Thin Layer Potential Scan Coulometry. Determination of Metal Ions and of Halide Ions Using a Mercury-Coated Platinum Electrode.

Oglesby¹,

Anderson²,

McDuffie³

et al. 1965

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…The coulometric apparatus and the titration' cell have been described (18). I n addition t o the usual stationary indicator electrode used in potentiometric titrations, a rotating electrode was used for amperometric studies.…”

Section: Methodsmentioning

confidence: 99%

Coulometric Titrations with Mercury(I and II). Determination of Cyanide

Przybylowicz¹,

Rogers²

1958

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

sition a t lower p H levels, with complete breakdown resulting from refluxing with mineral acid.Aliquots of the various solutions were tested for their content of free isonicotinic acid, the breakdown product, using essentially the method of Rubin and associates (4) based on the bromocyanogen reaction of Mueller and Fox ( 3 ) . With decreasing assay values for iproniazid, concomitantly increasing quantities of isonicotinic acid were found.Other aliquots of the solutions refluxed for 10 hours were subjected to paper chromatography, using butyl alcohol saturated with water as the mobile phase. The spots were developed in a chamber containing crystals of cyanogen bromide and the paper was then sprayed with a 1% alcoholic benzidine solution. Reddish spots, with an R, value of 0.16 identical with those of isonicotinic acid run in a parallel experiment, were obtained. Solution 1 showed large quantities of isonicotinic acid, solution 2 showed a distinct band of much less intensity, while solution 3 indicated only faint traces of isonicotinic acid, In a corresponding experiment, samples of iproniazid sirup, buffered a t various pH levels, were stored for 2 months a t room temperature and a t 45" C. While no loss was found with the colorimetric method in any of the samples stored a t room temperature, the samples stored at 45" C. showed the following losses in potency:Cent Loss Sample pH 1 month 2 months 4 5 6 4 14 1 2 Xone None Application to Related Compounds. d series of analogs was subjected to the colorimetric reaction a t the usual concentration of 0.2 mg. of base per ml. The results are listed in Table IV, in order of their decreasing absorbance. It would appear that compounds of the following general structure will produce such a color:// 0 R'-C-XHSHC-R where R = alkyl or aryl and R' = pyridine.

show abstract

“…Although a number of publications have been concerned with the coulometric determination of halides [2, 3,4, 5] there seem to have been no attempts made to establish the conditions for high-precision titrations, i.e., better than 0.1 percent. Accordingly, the work reported in this paper was undertaken as part of a continuing program at the National Bureau of Standards to develop coulometric titrations of high precision and accuracy[6].…”

Section: Introductionmentioning

confidence: 99%