OECD Guidelines for the Testing of Chemicals, Section 1 Test No. 108: Complex Formation Ability in Water PDF Download
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Author: OECD
Publisher: OECD Publishing
ISBN: 926406964X
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes the polarographic method. The ability of a substance to form complexes with metals can be assessed by means of polarographic techniques which allow the determination of stability constants for some complexes. The ...
Author: OECD
Publisher: OECD Publishing
ISBN: 926406964X
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes the polarographic method. The ability of a substance to form complexes with metals can be assessed by means of polarographic techniques which allow the determination of stability constants for some complexes. The ...
Author: Organisation for Economic Co-operation and Development
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes the polarographic method. The ability of a substance to form complexes with metals can be assessed by means of polarographic techniques which allow the determination of stability constants for some complexes. The polarographic method can be applied to substances with a water solubility greater than 10-5 M. This method is based on the fact that the reduction potentials of metal ions are shifted, usually to more negative values, as a result of complex formation. A minimum of four known concentrations of the chemical being tested should be investigated with a known concentration of metal ions. The chemical being tested should normally be present in at least a 25-fold excess over the metal ion concentrations. The current should be measured at applied potentials in the range - 0.2 V to -1.0 V. In order to detect complexes which form slowly, it is necessary to allow the solutions to stand under a nitrogen atmosphere for a minimum period of 24 hours. If the results are not significant, it is necessary to use methods based on different physicochemical principles, such as spectrophotometry or nuclear magnetic resonance spectrometry.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: OECD
Publisher: OECD Publishing
ISBN: 9264069704
Category :
Languages : en
Pages : 16
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Book Description
This Test Guideline describes a laboratory test method to assess abiotic hydrolytic transformations of chemicals in aquatic systems at pH values normally found in the environment (pH 4 – 9). This Guideline is designed as a tiered approach; each tier ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264015841
Category :
Languages : en
Pages : 17
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Book Description
This Test Guideline describes the slow-stirring method, which permits the determination of the 1-octanol/water partition coefficient (POW) values up to a log POW of 8.2. The partition coefficient between water and 1-octanol (POW) is defined as the ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264069887
Category :
Languages : en
Pages : 4
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Book Description
This Test Guideline describes a method to analyse the solution/extraction behaviour of polymers in water, which uses the flask method with modifications. Three samples of 10 g of particles of the test substance are weighed into each of three vessels ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264069585
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes methods to determine the water solubility of test substances. The water solubility of a substance is the saturation mass concentration of the substance in water at a given temperature. This guideline addresses the ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264069623
Category :
Languages : en
Pages : 4
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Book Description
This Test Guideline describes a method to determine experimentally Pow values in the range log Pow between -2 and 4 (occasionally up to 5). This method can not be used with surface-active materials. The partition coefficient is defined as the ratio ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264069720
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes the methods allowing the determination of the dissociation constants in water. The dissociation is the reversible splitting into two or more chemical species which may be ionic. The determination of the dissociation ...
Author: OECD
Publisher: OECD Publishing
ISBN: 9264203680
Category :
Languages : en
Pages : 6
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Book Description
This Test Guideline describes the procedure for the electronic determination of pH of an undiluted aqueous solution or dispersion, the pH of a dilution of a solution or dispersion in water, or the pH of a chemical diluted to end-use concentration ...
