Bestimmung des Zinngehaltes in Erzeugnissen der Konservenindustrie mittels Square‐wave‐polarographischer Methode

Borus‐Böszörményi, N.; Schoket, Bernadette

doi:10.1002/food.19790230509

Cited by 3 publications

References 10 publications

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Bestimmung von Kupfer, Blei, Cadmium, Zink und Zinn in Lebensmitteln mittels Square‐wave‐Polarographie

Borus-Böszörméanyi¹

1980

Nahrung

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Es wurde festgestellt, daß sich Kupfer, Blei, Cadmium und Zink bei der Bestimmung in Mengen nebeneinander, wie sie in Lebensmitteln vorkommen, nicht stören. Die Untersuchung einer eventuellen Störwirkung von Kobalt, Mangan und Nickel bei der Zinkbestimmung zeigte, daß Kobalt und Mangan nicht stören und Nickel erst in solchen Mengen störend wirkt, wie sie in Lebensmitteln praktisch kaum vorkommen. Die vorgeschlagene Methode wurde zur Bestimmung des Metallgehaltes in Tomatenpüree erprobt. Zur Kontrolle der Methode wurden vergleichende Untersuchungen mit spektrophotometrischen Methoden durchgeführt, ferner wurde die Wiederfindungsrate der den Proben zugesetzten Metalle untersucht. Die Versuchsergebnisse zeigen, daß die vorgeschlagene polarographische Methode ein schnelles, genaues, empfindliches Verfahren ist, das reproduzierbare Ergebnisse liefert und zur Bestimmung von Kupfer, Blei, Cadmium, Zink und Zinn in Lebensmitteln besonders geeignet ist.

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Bestimmung von Kupfer, Blei, Cadmium, Zink und Zinn in Lebensmitteln mittels Square‐wave‐Polarographie

Borus-Böszörméanyi¹

1980

Nahrung

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Microprocessor-controlled instrument for the simultaneous generation of square wave, alternating current, direct current, and pulse polarograms

Anderson¹,

Bond²

1983

Anal. Chem.

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With a square wave superlmposed onto a staircase potential ramp the technlque of square wave polarography (voltammetry) is shown to be capable of produclng data whlch enables square wave, DC, AC, pulse, and other polarograms (voltammograms) to be obtained from a single experlment. The method of data acqulsitlon and large number of methods of data presentation possible hlghllght the close slmllarltles of many polarographlc techniques rather than dlfferences more normally discussed in the literature. The ablllty to obtain the response for a range of polarographlc technlques from a single experlment with mlcroprocessor-based Instrumentation leads to a hlghly efflclent approach to analytlcal and klnetlc lnvestigatlons employing polarographlc and voltammetrlc met hods.The electrochemical technique of square wave polarography, SWP, was first reported by Barker and co-workers (1,2) at a dropping mercury electrode, DME. The technique was reviewed in 1975 by Sturrock and Carter (3) who noted that applications had been limited by the lack of good commercial instrumentation at reasonable cost. However, even by 1975, developments in theory and instrumentation in a limited number of laboratories, coupled with detailed data presenting analytical applications, indicated that square wave polarography should be an electroanalytical method of great advantage. Ramaley and Krause presented the theory for reversible systems (4) and examined the analytical usefulness of square wave voltammetry, SWV, at a hanging mercury drop electrode (HMDE) (5). The technique was then reexamined by Christie et al. who provided a more comprehensive theory for reversible systems including its application at the DME (6, 7). The only distinction made between SWP and SWV above is that the former is restricted to use of the DME, the latter being the more general term.In 1979, Boudrea and Perone stated that SWV may replace conventional differential pulse polarography, DPP, for quantitative determinations of electroactive species in solution (8). Recent editorial comment in the journal, ANALYTICAL CHEMISTRY, focused attention on this prospect (9). These editorial remarks now have catalyzed new activity in SWV as in the last year or so a great resurge in interest has emerged. Thus, new theory, applications, instrumental designs, and the appearance of modern commercially available instrumentation have been forthcoming in a very short period of time as perusal of ref 10 to 20 will indicate.The sensitivity of both square wave and differential pulse voltammetric techniques is excellent with detection limits in the to M concentration range (1-21). The main advantage claimed for SWV over DPP appears to be the possibility of using high scan rates which leads to a reduction in analysis time by allowing experiments to be performed on Present address:

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Determinação de Sn(II) por polarografia: aplicação no controle de qualidade de reagentes liofilizados para radiodiagnóstico

Lugon¹

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Bestimmung des Zinngehaltes in Erzeugnissen der Konservenindustrie mittels Square‐wave‐polarographischer Methode

Cited by 3 publications

References 10 publications

Bestimmung von Kupfer, Blei, Cadmium, Zink und Zinn in Lebensmitteln mittels Square‐wave‐Polarographie

Bestimmung von Kupfer, Blei, Cadmium, Zink und Zinn in Lebensmitteln mittels Square‐wave‐Polarographie

Microprocessor-controlled instrument for the simultaneous generation of square wave, alternating current, direct current, and pulse polarograms

Determinação de Sn(II) por polarografia: aplicação no controle de qualidade de reagentes liofilizados para radiodiagnóstico

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