Elimination of copper-zinc intermetallic interferences in anodic stripping voltammetry

Copeland, Thomas R.; Osteryoung, R. A.; Skogerboe, R. K.

doi:10.1021/ac60350a036

Cited by 133 publications

(38 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When using gallium to eliminate Zn/Cu intermetallic interference, it is generally recommended that sufficient gallium be added to obtain a well-defined stripping peak [5,7]. In this work, a Ga3* concentration of 100 pg/L was routinely used.…”

Section: Resuits and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Elimination of zinc/copper intermetallic interference in the determination of zinc in wastewaters and seawater by potentiometric stripping analysis

et al. 1993

View full text Add to dashboard Cite

A new approach to the elimination of Zn/Cu intermetallic interference in the determination of zinc by potentiometric stripping analysis is described. The method is based on the use of several enrichment/ stripping cycles, with each cycle using an enrichment time of 10 secdtlds or less and the stripping signal from each cycle being added to give the total stripping signal. The additive method compares favorably with the traditional "third element" approach based on the use of gallium, and it is demonstrated that, for an industrial sample containing oil and grease, the additive method has s i g n i a t advantages over the gallium method. The advantages of potentiometric stripping analysis in monitoring zinc in industrial wastes and the applicability of the technique to zinc speciation studies are described.

show abstract

Section: Resuits and Discussionmentioning

confidence: 99%

“…This is the "third element" approach [ 11. Gallium binds preferentially with the copper, thereby circumventing the formation of the zinc/copper intermetallic [5,6,7]. The use of gallium has also been recommended in PSA studies…”

Section: Wtroductionmentioning

confidence: 99%

Elimination of zinc/copper intermetallic interference in the determination of zinc in wastewaters and seawater by potentiometric stripping analysis

et al. 1993

View full text Add to dashboard Cite

show abstract

“…These include solution modification by addition of Ga 3þ [3], titration [4], exhaustive electrolytic removal of Cu 2þ before the deposition of Zn 2þ [5], and computational approaches such as the generalized standard addition method [6,7].…”

mentioning

confidence: 99%

Zeolite/Polymer-Modification of a Mercury Electrode. Effects on the Cu2+ Interference in the Stripping Determination of Zn2+

Mogensen

Kryger

1998

Electroanalysis

View full text Add to dashboard Cite

The present study was carried out in order to investigate whether zeolite 13X (aperture 7.4 Å ) modification of a mercury electrode could provide discrimination against the interference from Cu 2þ in the stripping determination of Zn 2þ (utilizing the zeolite ion exchange capability, and the possibility for small differences in size and shape of hydrated Zn 2þ and Cu 2þ and hence the differences in zeolite affinity to these species). For this purpose a chemically modified electrode (CME) was constructed from a glassy carbon electrode, which was first coated with a zeolite 10X containing polymer matrix then subjected to mercury plating. The analytical characteristics of the CME were subsequently compared with those of a conventional thin mercury film electrode (TMFE). The comparison, which was based on analogous stripping experiments carried out using first the TMFE, then the CME, showed that stripping signals for Zn 2þ as well as Cu 2þ were obtained with both electrodes. However, the intermetallic compound interference observed for the CME Zn-response was much less pronounced than that encountered for the TMFE Zn-response, thus indicating that the zeolite modification provided a marked discrimination towards deposition of Cu 2þ . Subsequent standard addition experiments with 60 s depositions at ¹1200 mV revealed that the Zn-stripping signal obtained with the CME was linear for 0-3.5 mM Zn 2þ in the presence of 10 mM Cu 2þ .

show abstract

“…The interaction of Zn with Cu in mercury has been investigated several times with respect to its behavior in ASV (18)(19)(20). These recent with numerous values spanning this range (27).…”

mentioning

confidence: 99%

“…As an alternative, Copeland, et al (18) discovered that by addition of Ga the Cu-Zn intermetallic interference of the Zn peak could be suppressed.…”

mentioning

confidence: 99%

The generalized standard addition method: intermetallic interferences in anodic stripping voltammetry

Gerlach

Kowalski

1982

Analytica Chimica Acta

View full text Add to dashboard Cite

Elimination of copper-zinc intermetallic interferences in anodic stripping voltammetry

Cited by 133 publications

References 9 publications

Elimination of zinc/copper intermetallic interference in the determination of zinc in wastewaters and seawater by potentiometric stripping analysis

Elimination of zinc/copper intermetallic interference in the determination of zinc in wastewaters and seawater by potentiometric stripping analysis

Zeolite/Polymer-Modification of a Mercury Electrode. Effects on the Cu2+ Interference in the Stripping Determination of Zn2+

The generalized standard addition method: intermetallic interferences in anodic stripping voltammetry

Contact Info

Product

Resources

About