OECD Guidelines for the Testing of Chemicals, Section 1 Test No. 115: Surface Tension of Aqueous Solutions PDF Download
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Author: OECD
Publisher: OECD Publishing
ISBN: 926406978X
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes methods to determine the surface tension (in N/m) of aqueous solutions. The methods are based on the measurement of the force which it is necessary to exert vertically on a stirrup or ring, in contact with the surface ...
Author: OECD
Publisher: OECD Publishing
ISBN: 926406978X
Category :
Languages : en
Pages : 7
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Book Description
This Test Guideline describes methods to determine the surface tension (in N/m) of aqueous solutions. The methods are based on the measurement of the force which it is necessary to exert vertically on a stirrup or ring, in contact with the surface ...
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 methods to determine the surface tension (in N/m) of aqueous solutions. The methods are based on the measurement of the force which it is necessary to exert vertically on a stirrup or ring, in contact with the surface of the liquid, in order to separate it from the surface, or on a plate, with an edge in contact with the surface, in order to draw up the film that has formed. There are four different methods: the plate method, the stirrup method, the ring method and the OECD harmonized ring method. They are described in detail in the ISO Standard 304-1985. The methods described are applicable to aqueous solutions of most substances regardless of their degree of purity. The concentration should be 90% of the saturation solubility, but must below 1g/l. This shall therefore be carried out under a protective cover to avoid interference at 20°C approximately. The ring is immersed below the surface of the solution. Then the table top, where the measurement vessel is placed, is lowered gradually and evenly at a rate of approximately 0.5 cm/min to detach the ring from the surface until the maximum force is reached. The force is read on the tensiometer. After completing the first measurement, measurements are repeated until a constant surface tension value is reached.
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: 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: 9264185291
Category :
Languages : en
Pages : 72
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Book Description
This Test Guideline describes a procedure for characterising the bioconcentration potential of substances in fish, using an aqueous (standard and minimised tests) or dietary exposure, under flow-through conditions (but semi-static regimes are ...
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 ...
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: 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: 9264069542
Category :
Languages : en
Pages : 8
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Book Description
This Test Guideline describes methods to determine the boiling point of test substances. The boiling point of a liquid is defined as the temperature (in K) at which the vapour pressure equals the standard atmospheric pressure 101.325 kPa. The ...
