Voltammetrische Anreicherung und Bestimmung sehr geringer Substanzmengen am hängenden Quecksilbertropfen unter Bildung schwerlöslicher Verbindungen mit dem Elektrodenmaterial

Berge, H.; Jeroschewski, Paul

doi:10.1007/bf00519978

Cited by 32 publications

(8 citation statements)

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“…Work in this area has been summarized by Fricke (6), Pungor and Buzas So far as clinical application of the chloride ion selective electrode (Cl-ISE) is concerned, silver-silver chloride (Ag/ AgC1) has been adapted as a solid-state membrane electrode. For example, Hansen and co-workers (11,12) demonstrated that the Ag/AgCl electrode could be effectively used for sweat analysis in relation to cystic fibrosis, and Lustgarten et al (13) and Dahms et al (14,15) applied the Ag/AgCl electrode to serum analysis. Pungor and co-workers developed a membrane by mixing AgCl with silicon rubber matrix (16,17), and a similar silver halide membrane was also investigated by Rechnitz et al (18).…”

Section: (5)mentioning

confidence: 97%

“…Most of the reported applications of CSV for anions which form sparingly soluble compounds with the electrode have been carried out at hanging mercury drop or mercury pool electrodes. The determination of trace quantities of halide ( 3 4 , sulfide (6)(7)(8)(9)(10)(11), cyanide (12), cyanoferrate(I1) and -(III) (13) and selenide ions (14,15), and various thiols (16-21) by deposition of their insoluble mercury salts has been reported. Several extensive reviews (22-24) covering stripping analysis have appeared and the reviews by Brainina have extensive sections on CSV.…”

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confidence: 99%

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Determination of sulfide by cathodic stripping voltammetry of silver sulfide films at a rotating silver disk electrode

Shimizu¹,

Osteryoung²

1981

Anal. Chem.

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The deposltlon and stripping behavlor of sllver sulflde films at the silver rotatlng dlsk electrode were Investigated. The effect of various factors-rotatlon rate, scan rate, deposltlon potential and time, and concentration of sulflde Ion-on the stripplng peak current and potential were studled. The electrode has been found to be an excellent electrode for cathodlc strlpplng voltammetry for the determlnatlon of submicro amounts of sulfide Ion. Furthermore, dlfferentlal pulse voltammetry significantly enhanced the slgnal/nolse ratlo, and a linear response was obtalned over the concentration range 10-8-10-5 mol dm-' of sulfide Ion in 0.2 mol dm-3 NaOH.We describe a procedure for trace determination of sulfide ion in solution based upon the cathodic stripping of electrodeposited Ag& This procedure evolved from studies of the formation of silver sulfide upon anodization of a silver electrode in sulfide-containing solutions and properties of the electrodeposited silver sulfide films at silver rotating disk electrodes (RDE) (1, 2).Although anodic stripping voltammetry (ASV) is a wellestablished technique for the determination of trace levels of metal ions in solution, the equivalent method for the determination of anions by cathodic stripping voltammetry (CSV) is less established. Most of the reported applications of CSV for anions which form sparingly soluble compounds with the electrode have been carried out at hanging mercury drop or mercury pool electrodes. The determination of trace quantities of halide ( 3 4 , sulfide (6-11), cyanide (12), cyanoferrate(I1) and -(III) (13) and selenide ions (14,15), and various thiols (16-21) by deposition of their insoluble mercury salts has been reported. Several extensive reviews (22-24) covering stripping analysis have appeared and the reviews by Brainina have extensive sections on CSV.Trace amounts of iodide were determined by CSV by Shah and Perone (25) as early as 1961. Although they used a silver electrode, it appears that little work with this electrode for CSV has been performed since.The solution containing the analyte is usually vigorously stirred during deposition (ASV) or film formation (CSV) to increase the efficiency of the deposition step. The stripping (ASV) step is usually carried out from a quiescent solution since stirring perturbs the mercury drop or pool electrode (26). Since the rotating electrode hydrodynamics are very well defined, increasing use has been made of thin-film mercury electrodes on rotating glassy carbon substrates. However, there is a significant lack of literature on the use of an RDE for anion determinations employing CSV.This paper reports on the deposition and stripping of silver sulfide films at a silver RDE and describes a procedure for the determination of submicro levels of sulfide. Linear potential scan or differential pulse voltammetry is employed during the reduction step stripping the Ag2S from the electrode surface.EXPERIMENTAL SECTION Reagents. Analytical grade sodium sulfide (Na2S-9H20, Mallinckrodt Inc.) and sodium hydroxide ...

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Section: (5)mentioning

confidence: 97%

mentioning

confidence: 99%

Determination of sulfide by cathodic stripping voltammetry of silver sulfide films at a rotating silver disk electrode

Shimizu¹,

Osteryoung²

1981

Anal. Chem.

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“…Trace determination of thiourea and its derivatives by such methods is well substantiated. 12,13 Under certain conditions, the ligand (previously accumulated as a compound with a metal ion) could be detected by its catalytic effect on an electrode reaction. This version of catalytic CSV has positive prospects, as pointed out in recent reviews.…”

Section: Introductionmentioning

confidence: 99%

Catalytic hydrogen evolution in cathodic stripping voltammetry on a mercury electrode in the presence of cobalt(ii) ion and phenylthiourea or thiourea

Spătaru

Bănică

2001

Analyst

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The system Co(II)-phenylthiourea (PTU)-borax buffer was investigated by cathodic stripping voltammetry (CSV) at a hanging mercury drop electrode. The results of the voltammetric measurements showed that the presence of both PTU and Co(II) gives rise to a new irreversible peak at about -1.5 V. Based upon our previous results obtained in the study of other sulfur compounds and the sulfide ion itself, the peak was ascribed to the catalytic hydrogen evolution superimposed on the reduction of the coordinated Co(II) ion. The catalyst itself is a Co(II) complex with the sulfide ion produced by the decomposition of the analyte during the deposition step. The influence of PTU and cobalt concentration, accumulation conditions and stripping parameters was investigated and complementary data on thiourea are included. The results showed that the measurement of the catalytic hydrogen evolution peak current can be used as a basis for a simple, accurate and rapid method for the determination of PTU within the concentration range 10-100 nM. The catalytic method is relatively free of interferences and could be a suitable alternative for cases in which the stripping peak due to mercury ion reduction in the accumulated mercury compound is disturbed by some interference.

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“…Ariel and coworkers (9) improve on normal stripping analysis by switching solutions between the plating and stripping steps. While stripping techniques usually thought of in connection with metal deposition, they apparently work for surfactants (137) and other insoluble species too (20).…”

Section: Large Amplitude Techniquesmentioning

confidence: 99%

Electrochemical Relaxation Techniques

Reinmuth¹

1966

Anal. Chem.

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Voltammetrische Anreicherung und Bestimmung sehr geringer Substanzmengen am hängenden Quecksilbertropfen unter Bildung schwerlöslicher Verbindungen mit dem Elektrodenmaterial

Cited by 32 publications

References 6 publications

Determination of sulfide by cathodic stripping voltammetry of silver sulfide films at a rotating silver disk electrode

Determination of sulfide by cathodic stripping voltammetry of silver sulfide films at a rotating silver disk electrode

Catalytic hydrogen evolution in cathodic stripping voltammetry on a mercury electrode in the presence of cobalt(ii) ion and phenylthiourea or thiourea

Electrochemical Relaxation Techniques

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