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GB/T 21853-2008: Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21853-2008 | English | 169 |
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Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method
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GB/T 21853-2008
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Basic data | Standard ID | GB/T 21853-2008 (GB/T21853-2008) | | Description (Translated English) | Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 7,755 | | Date of Issue | 2008-05-12 | | Date of Implementation | 2008-09-01 | | Adopted Standard | OECD No.107-1995, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards 2008 No. 8 (No. 121 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the chemical partition coefficient shake flask method test method outlined, testing procedures, quality assurance and quality control, data and reports. This standard applies to test non-surfactant chemicals like n-octanol water partition coefficient. This standard applies to n-octanol water partition coefficient of 10-2 ~ 104 range of chemicals measured. | GB/T 21853-2008: Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Testing of chemicals. Partition coefficient (n-octanol/water). Shake flask method
ICS 13.300
A80
National Standards of People's Republic of China
Chemical Distribution coefficient (n-octanol - water)
Shake flask method test
Posted 2008-05-12
2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with the Organisation for Economic Co-operation and Development (OECD) guidelines for testing of chemicals No. 107 (1995), "octanol - water distribution
Factor. shake-flask method "(in English).
This standard made the following editorial changes.
--- The units of measurement to our legal units of measurement.
This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points.
This standard is drafted by. Environmental Protection Department of Chemical Registration Center.
Participated in the drafting of this standard. Nanjing Institute of Environmental Sciences Department of Environmental Protection, Shenyang Research Institute of Chemical Safety Evaluation Center, Shanghai Central
Habitat Research Institute, Chinese Academy of Environmental Sciences.
The main drafters of this standard. Nie Jinglei, the new Liu Chun, Lu Ling, Liu Jining, Conde Yang, Zhao Ling Fei, Shen Xiang root, Li Handong.
This standard was first formulated.
Chemical Distribution coefficient (n-octanol - water)
Shake flask method test
1 Scope
This standard specifies the chemical distribution coefficient (n-octanol - water) shake flask method Test method overview, test procedures, quality assurance and quality control
System, data and reporting.
This standard applies to test non-surfactant type chemicals octanol - water partition coefficient.
This standard applies to the octanol - water partition coefficient for the determination of the range of 10-2 to 104 chemicals.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Than the equilibrium concentration of the test substance reached the immiscible two-phase medium.
2.2
Test substance in n-octanol - reach equilibrium water concentration ratio of the two-phase medium when to Pow expressed. Pow dimensionless, generally for 10
Logarithm (lgPow) represented.
3 test substance information
a) the formula;
b) formula;
c) solubility in water;
d) n-octanol solubility;
e) dissociation constant (pK);
f) hydrolysis resistance;
g) the surface tension.
4 Summary of Method
4.1 Principle
At constant temperature, constant pressure and a certain pH conditions, when the solute concentration in any one phase of no more than 0.01mol/L, in which two pure
Solvent distribution follows the Nernst (Nernst) laws. By continuous shaking for some time, so that the fat-soluble chemicals in an organic solvent (n-octyl
Alcohol) and water distribution phase equilibrium, the determination of the equilibrium concentration in both phases of chemicals, can determine the ratio of chemicals.
For the possible dissociation of chemicals, should adopt appropriate buffer solution. For the free acid, pH value of the buffer is at least
pK-1; for free base, buffer solution pH of at least pK + 1, to ensure that the chemicals were molecular state.
Partition coefficient surfactant class of chemicals which can be used to calculate the solubility in water and n-octanol.
4.2 reference material
This standard is not recommended reference substance.
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