Komplexone V. Die Äthylendiamin‐tetraessigsäure

Schwarzenbach, G.; Ackermann, H.

doi:10.1002/hlca.19470300649

Cited by 295 publications

(58 citation statements)

References 7 publications

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“…[27] and [28]. Appendices I and I1 describe evaluation of these relaxation contributions from equilibrium constants and enthalpies of reaction.…”

Section: 'mentioning

confidence: 99%

Thermodynamics of aqueous EDTA systems: Apparent and partial molar heat capacities and volumes of aqueous EDTA⁴⁻, HEDTA³⁻, H₂EDTA²⁻, NaEDTA³⁻, and KEDTA³⁻ at 25 °C. Relaxation effects in mixed aqueous electrolyte solutions and calculations of temperature dependent equilibrium constants

Hovey¹,

Hepler²,

Tremaine³

1988

Can. J. Chem.

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Calorimetric and densimetric measurements have led to apparent molar heat capacities and volumes for aqueous solutions of the mixed electrolytes [(CH3)4N]4EDTA + (CH3)4NOH, Na4EDTA + NaOH, and K4EDTA + KOH, and single electrolytes Na2H2EDTA and [(CH3)4N]3[HEDTA] at 25 °C. We have analyzed these results in terms of Young's rule and Pitzer's ion interaction model to obtain standard state partial molar heat capacities and volumes of EDTA4−(aq), HEDTA3−(aq), H2EDTA2−(aq), NaEDTA3−(aq), and KEDTA3−(aq) at 25 °C. For these calculations it was also necessary to evaluate the "relaxation" contribution to the measured heat capacities of some solutions. The partial molar heat capacities obtained here have been used with enthalpies from previous investigations for calculations of several equilibrium constants over wide ranges of temperature; volumes can be used for similar calculations of the effects of pressure.

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“…[27] and [28]. Appendices I and I1 describe evaluation of these relaxation contributions from equilibrium constants and enthalpies of reaction.…”

Section: 'mentioning

confidence: 99%

Thermodynamics of aqueous EDTA systems: Apparent and partial molar heat capacities and volumes of aqueous EDTA⁴⁻, HEDTA³⁻, H₂EDTA²⁻, NaEDTA³⁻, and KEDTA³⁻ at 25 °C. Relaxation effects in mixed aqueous electrolyte solutions and calculations of temperature dependent equilibrium constants

Hovey¹,

Hepler²,

Tremaine³

1988

Can. J. Chem.

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“…The Na(1)-EDTA and K(1)-EDTA systems have been studied a number of times (6)(7)(8)(9)(10). Literature formation constant values for complexes of 1 : 1 stoichiometry are given in Tables 1 and 2.…”

Section: Introductionmentioning

confidence: 99%

Solution speciation in the aqueous Na(I)–EDTA and K(I)–EDTA systems

Chen¹,

Reid²

1993

Can. J. Chem.

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. Speciation in the aqueous sodium(1) -ethylenediaminetetraacetic acid and potassium(1) -ethylenediaminetetraacetic acid equilibrium systems was investigated by automated gravimetric potentiometric titration. It was found that in both cases, particularly below neutral pH values, speciation includes a previously uncharacterized diprotonated complex. All formation and acid dissociation constants were measured for the full systems. The validity of previous literature equilibrium constants, which are based on incomplete equilibrium models, is discussed.MIN CHEN et R. STEPHEN REID. Can. J. Chem. 71, 763 (1993).Faisant appel 2 des titrages gravimetriques potentiomCtriques automatisCs, on a Ctudie la speciation des systemes aqueux a 1'Cquilibre des sels de sodium (ou de potassium) avec l'acide CthylknediaminetCtraacCtique. On a trouvC que, dans les deux cas, particulierement 2 des pH inferieurs i ceux de la neutralitk, la speciation inclut un complexe diprotone qui n'avait pas Ct6 caractCrisC anterieurement. On a mesure, pour tous les systemes, toutes les constantes de formation et de dissociation. On discute de la validit6 des constantes d'equilibre rapportees antkrieurement dans la 1ittCrature et basCes sur des modeles d'Cquilibre incomplets.[Traduit par la rCdaction]

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“…EDTA does not enter the cell, and it seems unlikely that the chromium-51 label separates from EDTA in competition with calcium [32]. The stability constant for CrEDTA is 10 23.4 , compared with 10 10.6 for CaEDTA [33][34][35]. Furthermore, studies by both Lopez-Curto et al [15] and Morris et al [16] indicated that the concentration of 51 Cr in blood was the same in dogs with ligated kidneys at 3 and 4 h. Therefore, the lower net extraction for EDTA-51 Cr compared with sucrose-14 C is likely due to a larger volume of distribution for EDTA, resulting in less back diffusion of tracer.…”

Section: Discussionmentioning

confidence: 99%

Transcapillary exchange and retention of fluoride, strontium, EDTA, sucrose, and antipyrine in bone

et al. 1980

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SummaryThe extractions of 85 Sr 2+ , 18 F − , sucrose-14 C, EDTA-51 Cr, and antipyrine-14 C in bone were determined by the multiple indicator-dilution method. Fluoride and strontium extractions were 18 to 70% during a single transcapillary passage, and those of EDTA and sucrose were from 11 to 59%, whereas extraction of antipyrine was 87%. Injections of 85 Sr 2+ and 18 F − made when perfusion was done alternately with blood and plasma resulted in similar fractional extractions. When flow and extraction were measured simultaneously, extraction was related inversely to flow.

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Komplexone V. Die Äthylendiamin‐tetraessigsäure

Cited by 295 publications

References 7 publications

Solution speciation in the aqueous Na(I)–EDTA and K(I)–EDTA systems

Transcapillary exchange and retention of fluoride, strontium, EDTA, sucrose, and antipyrine in bone

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Komplexone V. Die Äthylendiamin‐tetraessigsäure

Cited by 295 publications

References 7 publications

Thermodynamics of aqueous EDTA systems: Apparent and partial molar heat capacities and volumes of aqueous EDTA4−, HEDTA3−, H2EDTA2−, NaEDTA3−, and KEDTA3− at 25 °C. Relaxation effects in mixed aqueous electrolyte solutions and calculations of temperature dependent equilibrium constants

Thermodynamics of aqueous EDTA systems: Apparent and partial molar heat capacities and volumes of aqueous EDTA4−, HEDTA3−, H2EDTA2−, NaEDTA3−, and KEDTA3− at 25 °C. Relaxation effects in mixed aqueous electrolyte solutions and calculations of temperature dependent equilibrium constants

Solution speciation in the aqueous Na(I)–EDTA and K(I)–EDTA systems

Transcapillary exchange and retention of fluoride, strontium, EDTA, sucrose, and antipyrine in bone

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