Colorimetric Estimation of Various Metal Derivatives of Sodium Diethyldithiocarbamate

Lacoste, R. J.; Earing, Mason.; Wiberley, Stephen E.

doi:10.1021/ac60054a010

Cited by 69 publications

(16 citation statements)

References 11 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a similar series of experiments with the non-cationic fraction using Co2+ rather than Cu2+ only about 50 per cent of the cobalt could be extracted from the aqueous phase containing the soil organic matter using diethyldithiocarbamate (Lacoste et al, 1951). Even after re eated organic matter and the organic phase remained colourless.…”

Section: Sequestering Of Metal Ions At Alkaline Phs and Analysis For mentioning

confidence: 98%

Fulvic Acid. Ii. Interaction With Metal Ions

MacCarthy

O'cinneide

1974

Journal of Soil Science

View full text Add to dashboard Cite

Evidence is presented, based on sequestration, chemical behaviour, ultra-violet and infra-red spectroscopy, to indicate the formation between the non-cationic fraction of fulvic acid and a variety of transition metal ions, of stable soluble complexes and also of insoluble complexes over the complete pH range. The soluble complexes formed under alkaline conditions are negatively charged. The fulvic material is very effective in competing with other ligands for the metal ions. Mechanisms for the flocculation of the soil organic matter in the presence of heavy metal ions are discussed. The formation of inert complexes between cobalt and the fulvic material is also demonstrated and its implications to the study of metallo-organic complexes are discussed.

show abstract

Section: Sequestering Of Metal Ions At Alkaline Phs and Analysis For mentioning

confidence: 98%

Fulvic Acid. Ii. Interaction With Metal Ions

MacCarthy

O'cinneide

1974

Journal of Soil Science

View full text Add to dashboard Cite

show abstract

“…The complexing ability of ethylenediaminetetraacetic acid disodium salt (EDTA) (Eastman Organic Chemicals) was determined by the removal of calcium ions, and the complexing ability of diethyldithiocarbamic acid sodium salt (DEDTC) (Eastman Organic Chemicals) was determined qualitatively by the color of the copper DEDTC in chloroform (9).…”

Section: Methodsmentioning

confidence: 99%

The Production of Hydrogen Peroxide by High Oxygen Pressures

Gilbert

Gerschman

Ruhm

et al. 1958

The Journal of General Physiology

View full text Add to dashboard Cite

Hydrogen peroxide is formed in solutions of glutathione exposed to oxygen. This hydrogen peroxide or its precursors will decrease the viscosity of polymers like desoxyribonucleic acid and sodium alginate. Further knowledge of the mechanism of these chemical effects of oxygen might further the understanding of the biological effects of oxygen. This study deals with the rate of solution of oxygen and with the decomposition of hydrogen peroxide in chemical systems exposed to high oxygen pressures. At 6 atmospheres, the absorption coefficient for oxygen into water was about 1 em./hour and at 143 atmospheres, it was about 2 em./hour; the difference probably being due to the modus operandi. The addition of cobalt (H), manganese (II), nickel (II), or zinc ions in glutathione (GSH) solutions exposed to high oxygen pressure decreased the net formation of hydrogen peroxide and also the reduced glutathione remaining in the solution. Studies on hydrogen peroxide decomposition indicated that these ions act probably by accelerating the hydrogen perioxide oxidation of glutathione. The chelating agent, ethylenediaminetetraacetie acid disodium salt, inhibited the oxidation of GSH exposed to high oxygen pressure for 14 hours. However, indication that oxidation still occurred, though at a much slower rate, was found in experiments lasting 10 weeks. Thiourea decomposed hydrogen peroxide very rapidly. When GSH solutions were exposed to high oxygen pressure, there was oxidation of the GSH, which became relatively smaller with increasing concentrations of GSH.When reduced glutathione solutions are exposed to high oxygen pressures, there is a significant production of hydrogen peroxide (1). If sodium desoxyribonucleic acid or sodium alginate were present in these solutions there was a decrease in viscosity which was attributed to reaction of these polymers with the hydrogen peroxide formed or its precursors (free radicals). These prooxidative effects of glutathione are inhibited by ethylenediaminetetraacetic acid disodium salt (EDTA) and thiourea. It has been found that agents

show abstract

“…In the samples the thermal destruction degree was periodically determined by means of colorimetry at wavelengths of X = 515 nm forFe[dedtc]3 [8], ofX = 481 nm for Co[dedtc]3 [9] and of X = 427 nm for Ni[dedtc]2 [9]. Determination of Nadedtc was performed after a rapid reaction between Nadedtc and cupric ion by absorption measurements of Cu[dedtc]2 at X = 600 iim [10].…”

Section: Investigation Of Thermal Stability Of the Complexes And Nadedtcmentioning

confidence: 99%

Ligand Radioisotopic Exchange Reaction of Diethyldithiocarbamato Complexes of Fe (III), Co(lll) and Ni(ll) in Dioxane and Dimethylformamide

Kostański

Magas

1980

Radiochimica Acta

View full text Add to dashboard Cite

Using radiotracer technique and extraction Separation of reactants, the kinetics of the ligand isotopic exchange reaction of diethyldithiocarbamato complexes of Fe(III), Co(III) and Ni(II) in dioxane and dimethylformamide has been studied. MCKAY's plots are linear, and no zero time exchange has been observed. The exchange reaction is very slow for the cobalt complex, whereas for the iron and nickel complexes the reaction is very fast. The ligand exchange reaction for the cobalt complex seems to be of the first order with respect to the complex, and of zero order with respect to the ligand, which suggests the S^i mechanism. Activation energy and activat'ion entropy for this reaction in dimethylformamide are 88.4±8.9 kJ/mol and 48.8±25.2 J/mol-K respectively.

show abstract

Colorimetric Estimation of Various Metal Derivatives of Sodium Diethyldithiocarbamate

Cited by 69 publications

References 11 publications

Fulvic Acid. Ii. Interaction With Metal Ions

Fulvic Acid. Ii. Interaction With Metal Ions

The Production of Hydrogen Peroxide by High Oxygen Pressures

Ligand Radioisotopic Exchange Reaction of Diethyldithiocarbamato Complexes of Fe (III), Co(lll) and Ni(ll) in Dioxane and Dimethylformamide

Contact Info

Product

Resources

About