Interpretation of non–Nernstian slopes in graphic analysis of data collected in pH range close to deprotonation of a ligandPart I. A glass electrode potentiometric and polarographic study of Cd–(TAPSO)x–(OH)y and Zn–(TAPSO)x–(OH)y systems

Machado, Carina M. M.; Cukrowski, Ignacy; Soares, Helena

doi:10.1016/j.talanta.2005.06.003

Cited by 4 publications

(2 citation statements)

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“…TES, TAPSO and tricine have stability constants described for most of the metals. 8,23,25,26,43,[48][49][50][51][52][53][54] Renganathan et al 7 found interferences in Cu inhibition of photosystem II electron transport due to bonding between Cu and TES, Tris and tricine. For TAPSO and TAPS, there is evidence of complexation with Cd, Co, Cu, Pb, Ni and Zn.…”

Section: Tris Familymentioning

confidence: 99%

“…For TAPSO and TAPS, there is evidence of complexation with Cd, Co, Cu, Pb, Ni and Zn. 41,43,[49][50][51]55,56 Muzikar et al 57 warned against the use of TAPS in buffering electrolytes and presented stability constants with Ca, Mg, Sr and Ba, but the values are extremely low. In the case of TABS, only values for Fe and Cr were found in the literature, 25,26 but due to its structure (Table 1), it probably complexes with other metals.…”

Section: Tris Familymentioning

confidence: 99%

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(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

et al. 2015

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The use of buffers to maintain the pH within a desired range is a very common practice in chemical, biochemical and biological studies.Among them, zwitterionic N-substituted aminosulfonic acids, usually known as Good'sbuffers, although widely used, can complex metals and interact with biological systems. The present work reviews, discusses and updates the metal complexation characteristics of thirty one commercially available buffers. In addition, their impact on biological systems is also presented. The influences of these buffers on the results obtained in biological, biochemical and environmental studies, with special focus on their interaction with metal ions, are highlighted and critically reviewed. Using chemical speciation simulations, based on the current knowledge of the metal-buffer stability constants, a proposal of the most adequate buffer to employ for a given metal ion is presented.

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Section: Tris Familymentioning

confidence: 99%

Section: Tris Familymentioning

confidence: 99%

(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

et al. 2015

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Complex Formation in the Region of Metal Hydrolysis and M(OH)₂ Precipitation. A Glass Electrode Potentiometric and Polarographic Study of Cd–(AMPSO)_x–(OH)_y and Zn–(AMPSO)_x–(OH)_y Systems

2006

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The interaction between cadmium or zinc and AMPSO was investigated by DCP and GEP, at fixed total ligand to total metal concentration ratios and various pH values, at 25.0 8C and 0.1 M KNO 3 ionic strength. For Cd -(AMPSO) x -(OH) y system, CdL and CdL(OH) species, were identified, with stability constants values set to (as log b): 2.1 AE 0.1 and 6.2 AE 0.2, respectively. For Zn -(AMPSO) x -(OH) y system, the proposed final model with stability constants set to (as log b) is: ZnL ¼ 2.5 AE 0.1 and ZnL(OH) 2 ¼ 12.9 AE 0.2. For both systems, the fact that AMPSO deprotonation occurs in the metal hydrolysis and M(OH) 2 precipitation and the complexes formed are not too strong added a real challenge to data interpretation.

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Influence of electronic and steric effects on stability constants and electrochemical reversibility of divalent ion complexes with glycine and sarcosine

Cukrowski

Marques

Mkwizu

et al. 2007

Analytica Chimica Acta

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Interpretation of non–Nernstian slopes in graphic analysis of data collected in pH range close to deprotonation of a ligandPart I. A glass electrode potentiometric and polarographic study of Cd–(TAPSO)x–(OH)y and Zn–(TAPSO)x–(OH)y systems

Cited by 4 publications

References 14 publications

(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

Complex Formation in the Region of Metal Hydrolysis and M(OH)₂ Precipitation. A Glass Electrode Potentiometric and Polarographic Study of Cd–(AMPSO)_x–(OH)_y and Zn–(AMPSO)_x–(OH)_y Systems

Influence of electronic and steric effects on stability constants and electrochemical reversibility of divalent ion complexes with glycine and sarcosine

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Interpretation of non–Nernstian slopes in graphic analysis of data collected in pH range close to deprotonation of a ligandPart I. A glass electrode potentiometric and polarographic study of Cd–(TAPSO)x–(OH)y and Zn–(TAPSO)x–(OH)y systems

Cited by 4 publications

References 14 publications

(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

(Un)suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions – a review

Complex Formation in the Region of Metal Hydrolysis and M(OH)2 Precipitation. A Glass Electrode Potentiometric and Polarographic Study of Cd–(AMPSO)x–(OH)y and Zn–(AMPSO)x–(OH)y Systems

Influence of electronic and steric effects on stability constants and electrochemical reversibility of divalent ion complexes with glycine and sarcosine

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Complex Formation in the Region of Metal Hydrolysis and M(OH)₂ Precipitation. A Glass Electrode Potentiometric and Polarographic Study of Cd–(AMPSO)_x–(OH)_y and Zn–(AMPSO)_x–(OH)_y Systems