Voltammetric Soft Modelling Approach for Systems with Both Electrochemically Labile and Inert Complexes: the Zn-Glycine Case

Fernández, Mercedes; Ariño, Cristina; Dı́az-Cruz, José Manuel; Tauler, R.; Esteban, Miquel

doi:10.1002/1521-4109(200111)13:17<1405::aid-elan1405>3.0.co;2-v

Cited by 14 publications

(3 citation statements)

References 22 publications

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“…The formation of 1:1 and 1:2 Cd:GSH complexes was detected simultaneously with the assistance of the extracted concentration profiles of the two analyte complexes. Elsewhere, this chemometrics method was also applied for the resolution of voltammograms of Zn 2+ -peptide and Zn 2+ -glycine complex systems [147,148]. The stability constants of these complexes were estimated from the concentration profiles obtained by means of the ALS optimization.…”

Section: Application Of Chemometrics and Electroanalysis For Qualitatmentioning

confidence: 99%

Does chemometrics enhance the performance of electroanalysis?

Kokot

2008

Analytica Chimica Acta

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Section: Application Of Chemometrics and Electroanalysis For Qualitatmentioning

confidence: 99%

Does chemometrics enhance the performance of electroanalysis?

Kokot

2008

Analytica Chimica Acta

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“…Glycine is an efficient complexing agent for Zn 2+ . Glycine zwitterions have been shown to form labile [ZnGly] + complexes with potentially minor contributions from [ZnGly 2 ] complexes in the pH range of 6 to 9 . Zinc carbonate and zinc hydroxy carbonate have very low solubility in pure water, but aqueous glycine solutions have been reported to dissolve some bivalent compounds of zinc .…”

Section: Introductionmentioning

confidence: 99%

Convenient extraction method for quantification of thin zinc patina layers

Saarimaa¹,

Kaleva

Paunikallio³

et al. 2018

Surface & Interface Analysis

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Synthetic zinc patina was grown on galvanized steel sheets in supercritical carbon dioxide atmosphere. Different patina compounds were dissolved and quantified using a stepwise immersion and dissolution procedure. The distinct patina components, namely anhydrous zinc carbonate (a dense layer adjacent to metallic zinc) and zinc hydroxy carbonate (nanowires on the surface), were dissolved in glycine solutions, followed by quantification of Zn 2+ in the solutes by X-ray fluorescence. The zinc hydroxy carbonate nanowires were readily glycine soluble, and the anhydrous zinc carbonate showed scarce glycine solubility, which enabled their selective quantification. The amount of the remaining (anhydrous) zinc carbonate after glycine extraction was determined from the glycine-soluble zinc oxide after calcination (heat treatment for 10 minutes at 350°C). The results were verified by scanning electron microscopy imaging and Fourier transform infrared spectroscopy measurements.

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“…The main reasons for lack of voltammetric experiments are strong iron(III) hydrolyzing capacity, as well as strong glycine protonation constants [13,14] which suppose a use of large excess of glycine in order to enable the formation of iron(III)-glycine complexes and to observe the voltammetric signals of its oxidoreduction processes. Glycine has been voltammetrically investigated much more in the complexes with other metal ions such as cadmium(II) [18] and zinc(II) [19], where hydrolysis does not take place in such extent.…”

Section: Introductionmentioning

confidence: 99%