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GB/T 21795-2008 English PDF

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US$274.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21795-2008: Testing of chemicals -- Simulation test Aerobic sewage treatment -- Biofilms
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21795-2008	274	Add to Cart	3 days	Testing of chemicals -- Simulation test Aerobic sewage treatment -- Biofilms	Valid

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Basic data

Standard ID: GB/T 21795-2008 (GB/T21795-2008)
Description (Translated English): Testing of chemicals -- Simulation test Aerobic sewage treatment -- Biofilms
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300; 13.020.40
Word Count Estimation: 14,144
Date of Issue: 2008-05-12
Date of Implementation: 2008-09-01
Adopted Standard: OECD No.303B-2001, IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 7, 2008 (No. 120 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 simulation test Aerobic sewage treatment methods outlined biofilm, test preparation, test procedures, quality assurance and quality control, data and reports. This standard applies to inherently biodegradable, but not fast biodegradable chemicals, also applies to the need for more information on the material, especially high- tonnage chemicals. Substances insoluble in water and volatile materials require special pretreatment in order to be tested.

GB/T 21795-2008: Testing of chemicals -- Simulation test Aerobic sewage treatment -- Biofilms

---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 Simulation test Aerobic sewage treatment -. Biofilms ICS 13.300; 13.020.40 A80 National Standards of People's Republic of China CHEMICALS Simulation Test Aerobic sewage treatment biofilm 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. 303B (2001 Nian) "pollution simulation test Water aerobic treatment. biofilm "(in English). This standard made the following editorial changes. --- Increasing the terms and definitions section. Appendix A of this standard and Appendix B is an informative annex. 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. China Environmental Science Research Institute, Chinese Academy of Inspection and Quarantine. The main drafters of this standard. high reflect the new, new Liu Chun, Lu Ling, Li Handong, Li Ji, Falls Apart. CHEMICALS Simulation Test Aerobic sewage treatment biofilm

1 Scope

This standard specifies the chemical simulation test Aerobic sewage treatment biofilm methods outlined, test preparation, test procedures, quality assurance And quality control, data and reports. This standard applies to inherently biodegradable, but does not have the biodegradability of chemicals, but also for more information Substances, especially high-tonnage chemicals. Hardly water-soluble substance and the volatile substances after pretreatment require a special form to be tested.

2 Terms and definitions

The following terms and definitions apply to this standard. 2.1 Test substance exhibiting a limited time in contact with the inoculum biodegradability. 2.2 Under optimum conditions, the test substance for a long time in contact with the exhibit inoculum potential for biodegradation. 2.3 Solution, organic carbon content, usually through the 0.45μm membrane filter liquid organic carbon content, or by 4000r/min transfer Centrifugation content of organic carbon in the supernatant after 15min. 2.4 The total amount of test medium (including solutions and suspensions) organic carbon.

3 test substance information

a) structural formula; b) purity; c) volatility; d) solubility in water; e) adsorption; f) microbial toxicity.

4 Summary of Method

4.1 Principle The synthetic or domestic sewage as well as the test substance, the mixing or separately added to the rotating tube reactor, biofilm inclined Construction On the inner wall of the tube. Select the reactor operating conditions, so as to fully remove organic matter. Analysis of the water of dissolved organic carbon (DOC) of Analysis of content or concentration of the test substance with a specific method. For comparison, a control group without the test substance is also operating under the same conditions. Test ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21795-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21795-2008_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 21795-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21795-2008_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.