Zobrazeno 1 - 10
of 129
pro vyhledávání: '"M.H. Back"'
Publikováno v:
Electroanalysis. 15:903-906
Effect of competition of major cations, Ca2+, Mg2+, and trace metals, Cu2+, Ni2+ and Zn2+, on the stability of the Pb(II)-fulvic acid (FA) complexes in model systems at constant pH and ionic strength was investigated by square-wave anodic stripping v
Autor:
Jeffrey Guthrie, M.H. Back, John Murimboh, Nouri M. Hassan, Mohamed Abdel Salam, Chuni L. Chakrabarti, D.C. Grégoire, Rupasri Mandal
Publikováno v:
Analytica Chimica Acta. 480:157-169
Publications on the binding characteristics of metals with humic acid (HA) are sparse. Here we investigated the release of nickel from Ni(II)–HA complexes using model solutions of three different [Ni(II)]/[HA] mole ratios at three different pH valu
Autor:
John Murimboh, Chuni L. Chakrabarti, Mohamed Abdel Salam, Nouri M. Hassan, D.C. Grégoire, M.H. Back, Rupasri Mandal
Publikováno v:
Environmental Science & Technology. 34:2201-2208
Competition of Ca(II) and Mg(II) with Ni(II) ions for binding sites of a well-characterized fulvic acid (FA) in model solutions at constant pH and ionic strength was investigated. The Competing Ligand Exchange Method with Chelex-100 and dimethyl glyo
Autor:
M.H. Back, Chuni L. Chakrabarti, Amina L.R. Sekaly, D.C. Grégoire, Julia Y. Lu, William H. Schroeder
Publikováno v:
Analytica Chimica Acta. 402:223-231
The stability of nickel, lead, copper, cadmium, aluminium and zinc in the dissolved phase of environmental aqueous samples stored in common containers made of various materials was investigated. The samples were Rideau River surface water, rainwater
Autor:
D.C. Grégoire, M.H. Back, Rupasri Mandal, Chuni L. Chakrabarti, John Murimboh, Amina L.R. Sekaly, William H. Schroeder, Nouri M. Hassan
Publikováno v:
Analytica Chimica Acta. 402:211-221
The kinetics of dissociation of Ni(II), Pb(II), Cu(II), and Cd(II)–fulvic acid (FA, Armadale), and Al(III)–FA (Suwannee River) complexes in aqueous model solutions was studied by the competing ligand exchange method (CLEM). Chelex-100 cation exch
Autor:
William H. Schroeder, John Murimboh, M.H. Back, Nouri M. Hassan, Chuni L. Chakrabarti, Amina L.R. Sekaly, Rupasri Mandal, D.C. Grégoire
Publikováno v:
Analytica Chimica Acta. 395:323-334
Competitive binding of Cu2+, Co2+ and Ni2+ ions by naturally-occurring organic complexants in the Rideau River surface water (RRSW) samples has been investigated employing the competing ligand exchange method (CLEM). It is well known that the reactio
Autor:
Chuni L. Chakrabarti, M.H. Back, John Murimboh, William H. Schroeder, D.C. Grégoire, Amina L.R. Sekaly, Nouri M. Hassan, Rupasri Mandal
Publikováno v:
Analytica Chimica Acta. 395:309-322
The competitive binding of Cu(II), Co(II) and Ni(II) ions by a well-characterized fulvic acid (FA) in model aqueous solutions has been investigated by employing the competing ligand exchange method (CLEM) with Chelex-100 as the competing ligand. The
Autor:
Amina L.R. Sekaly, M.H. Back, Julia Y. Lu, William H. Schroeder, D.C. Grégoire, Chuni L. Chakrabarti
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 53:837-846
A method for the analysis of exponential decay curves involving several kinetic components has been evaluated using simulated data. The method was originally developed for determination of fluorescence lifetimes and is applied here to data similar to
Autor:
M.H. Back
Publikováno v:
Canadian Journal of Chemistry. 75:249-257
The results of studies of the kinetics of the reaction of oxygen with thin films of carbon are described with special emphasis on the role, in the mechanism of the reaction, of the stable complex formed between oxygen and the carbon surface. A key pa
Publikováno v:
Environmental Science & Technology. 30:1245-1252
Rotating disk electrode (RDE) voltammetry with a mercury thin-film electrode on a glassy carbon substrate combined with anodic stripping voltammetry (ASV) using square-wave, differential-pulse, and staircase waveforms was applied to direct determinat