Complexation of Ni, Cu, Zn, and Cd by DOC in some metal-impacted freshwater lakes: a comparison of approaches using electrochemical determination of free-metal-ion and labile complexes and a computer speciation model, WHAM V and VI

2005 ◽  
Vol 528 (2) ◽  
pp. 205-218 ◽  
Author(s):  
J.W. Guthrie ◽  
N.M. Hassan ◽  
M.S.A. Salam ◽  
I.I. Fasfous ◽  
C.A. Murimboh ◽  
...  
Keyword(s):  
Metal Ion ◽  
Electrochemical Determination ◽  
Freshwater Lakes ◽  
Speciation Model ◽  
Free Metal ◽  
Free Metal Ion

Ion Exchange Complexing Resins as Sensors for the Determination of Free Metal Ion Concentration at a Low Level

2008 ◽  
Vol 26 (3) ◽  
pp. 301-320 ◽  
Author(s):  
Maria Pesavento ◽  
Antonella Profumo ◽  
Raffaela Biesuz ◽  
Giancarla Alberti
Keyword(s):  
Ion Exchange ◽  
Metal Ion ◽  
Ion Concentration ◽  
Low Level ◽  
Free Metal ◽  
Free Metal Ion

A study of the Ca2+ – Arsenazo III system and its application to the spectrophotometric determination of free calcium in solution

1990 ◽  
Vol 68 (11) ◽  
pp. 1932-1936 ◽  
Author(s):  
Byron Kratochvil ◽  
Xi-Wen He
Keyword(s):  
Ionic Strength ◽  
Calcium Ion ◽  
Calcium Binding ◽  
Metal Ion ◽  
Arsenazo Iii ◽  
Free Calcium ◽  
Ionic Calcium ◽  
Free Metal ◽  
Free Metal Ion

A two-wavelength method was applied to the determination of free, ionic calcium with Arsenazo III in solutions containing calcium-binding ligands. By this procedure impurities in the indicator can be corrected for, thereby allowing the use of commercial indicator preparations with purities as low as 80%. Only a 1:1 complex with a conditional log stability constant of 4.28 ± 0.13 at pH 4.6 and ionic strength 0.1 was found under the conditions studied. Key words: free metal ion determination, calcium ion speciation, spectrophotometry, arsenazo III, ion increment method for speciation.

scholarly journals Determination of free metal ion concentrations with AGNES in low ionic strength media

2013 ◽  
Vol 689 ◽  
pp. 276-283 ◽  
Author(s):  
D. Aguilar ◽  
C. Parat ◽  
J. Galceran ◽  
E. Companys ◽  
J. Puy ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Metal Ion ◽  
Ion Concentrations ◽  
Low Ionic Strength ◽  
Free Metal ◽  
Free Metal Ion

Prediction of Soluble Nickel Removal by Activated Sludge Using Free Metal Ion Concentrations

1987 ◽  
Vol 19 (3-4) ◽  
pp. 439-448 ◽  
Author(s):  
Jeppe S. Nielsen ◽  
Steve E. Hrudey ◽  
Frederick F. Cantwell
Keyword(s):  
Activated Sludge ◽  
Metal Ion ◽  
Municipal Sewage ◽  
Nickel Ion ◽  
Ion Concentrations ◽  
Untreated Sewage ◽  
Nickel Uptake ◽  
Nickel Removal ◽  
Free Metal ◽  
Free Metal Ion

Batch isotherm studies using spiked sewage samples containing a range of total soluble nickel concentrations typical of municipal sewage strongly suggested that it is the free (i.e. uncomplexed) nickel ion that is sorbed by activated sludge. Equations relating nickel uptake by activated sludge to free nickel ion concentrations and the extent of complexation in untreated sewage were developed and applied. Predicted and measured nickel removals generally agreed to within ± 30%.

Free metal ion availability is a major factor for tolerance and growth in Physcomitrella patens

2015 ◽  
Vol 110 ◽  
pp. 1-10 ◽  
Author(s):  
Stefan Sassmann ◽  
Wolfram Adlassnig ◽  
Markus Puschenreiter ◽  
Edwin Julio Palomino Cadenas ◽  
Mario Leyvas ◽  
...  
Keyword(s):  
Metal Ion ◽  
Physcomitrella Patens ◽  
Free Metal ◽  
Free Metal Ion

Effects of reactive gas addition on ionization of metal atoms in droplet-free metal ion sources

2007 ◽  
Vol 201 (15) ◽  
pp. 6655-6659 ◽  
Author(s):  
Keiji Nakamura ◽  
Akira Wakayama ◽  
Ken Yukimura
Keyword(s):  
Metal Ion ◽  
Ion Sources ◽  
Metal Atoms ◽  
Free Metal ◽  
Free Metal Ion ◽  
Reactive Gas
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