摘要:

Differential pulse(d. p.)polarography has been used to study the simple and mixed ligand complexes of 1, 3 diaminopropane (DAMP) and phthalate(PHLT) with Cd(II) at constant ionic strength (u= 1.0 M NaNO3) at 25°C The overall formation constants of simple and mixed complexes were calculated. The reduction of the simple and mixed species is reversible and diffusion controlled. The postive values of the mixing constants for the mixed-ligand complexes indicate that the mixed-ligand complexes are more stable than simple binary complexes. The equilibria between the various mixed-ligand species in the solution and their equilibrium are given.

ISSN:0003-2719    

DOI:10.1080/00032718708078046

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

A differential pulse polarographic study of the complexation of cadmium(II) with imidazole gives the relationship, Ej/2= -0.798 – 0.132 log [imidazole]tfor the cadmium(II) half wave potential (E]/2) with imidazole concentration. Also, the differences between the half-wave potentials (ΔEj/2) of the complex and metal ion have been used to determine log gn(6.75) and coordination number (4) for the cadmium-imidazole complex according to Subrahmanya's method.

ISSN:0003-2719    

DOI:10.1080/00032718708078047

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

An extensive study of the organic components of the leachate from the University of Connecticut landfill has been carried out. A modification of EPA Method 625 for base/neutral extractable organics was used to obtain both the gas chromatographic profiles and the mass spectrometric identification of the organics in groundwater samples from six test wells and several private wells in the vicinity of the landfill. A characteristic fingerprint representing a number of components was consistently found in the analysis of the landfill leachate but not in the drinking water of the private residences located on an adjoining road. Gas chromatographic parameters for optimum qualitative and quantitative analysis of field samples were determined using an acetone solution of the model leachate sample. It was confirmed that the on-column injection mode resulted in greater flame ionization detector (FID) response and more reproducible peak areas than the splitless mode. The major variable in obtaining reproducible data was the field sampling at the landfill, not the solvent reduction step or the injection mode used to introduce the sample into the gas chromatograph.

ISSN:0003-2719    

DOI:10.1080/00032718708078048

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032718708078035

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor