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GB/T 21853-2008 English PDF

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US$169.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21853-2008: Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21853-2008	169	Add to Cart	3 days	Testing of chemicals -- Partition coefficient (n-octanol/water) -- Shake flask method	Valid

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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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21853-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21853-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21853-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21853-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.