GB/T 21816-2008 English PDFUS$174.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21816-2008: Chemicals -- Inherent biodegradability -- Zahn-Wellens test Status: Valid
Basic dataStandard ID: GB/T 21816-2008 (GB/T21816-2008)Description (Translated English): Chemicals -- Inherent biodegradability -- Zahn-Wellens test Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A80 Classification of International Standard: 13.300; 13.020.40 Word Count Estimation: 9,966 Date of Issue: 2008-05-12 Date of Implementation: 2008-09-01 Adopted Standard: OECD No.302B-1992, 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 inherent biodegradability of chemicals Zane Test methods outlined Florence Hui, test preparation, test procedures, quality assurance and quality control, data and reports. This standard applies to the determination of water-soluble, non- volatile, no strong adsorption, and not because of the loss of foam solution, the test concentrations no inhibition of microbial chemicals inherent biodegradability. GB/T 21816-2008: Chemicals -- Inherent biodegradability -- Zahn-Wellens test---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.Chemicals. Inherent biodegradability. Zahn-Wellens test ICS 13.300; 13.020.40 A80 National Standards of People's Republic of China Chemicals inherent biodegradability Zahn - Wellens 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 ForewordThis standard is identical with the Organisation for Economic Co-operation and Development (OECD) guidelines for testing of chemicals No. 302B (1992 Nian) "Zahn - Wellens test Test "(in English). This standard made the following editorial changes. --- The units of measurement to our legal units of measurement. Appendix A of this standard 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. Nanjing Institute of Environmental Sciences Department of Environmental Protection, Shenyang Research Institute of Chemical Safety Evaluation Center of Shanghai inspection Testing center. The main drafters of this standard. the new Liu Chun, Lu Ling, Nie Jinglei, Liu Jining, Shi Lili, Song Mei Hou, Zhao Huaqing. Chemicals inherent biodegradability Zahn - Wellens test1 ScopeChemicals inherent biodegradability Zane This standard specifies - Wellens test method overview, test preparation, test procedures, quality assurance And quality control, data and reports. This standard applies to the determination of water soluble (water concentration of not less than 50mg/L, with DOC dollars), non-volatile, no strong adsorption And not because of the loss of foaming solution, the concentration of the test for inherent biological microorganisms without inhibiting chemical degradation.2 Terms and definitionsThe following terms and definitions apply to this standard. 2.1 Under optimum conditions, the test substance for a long time in contact with the exhibit inoculum potential for biodegradation. 2.2 Test substance causes chemical changes in the structure characteristic of the process of loss under biological effect. 2.3 The total amount of test medium (including solutions and suspensions) organic carbon. 2.4 Solution, organic carbon content, usually through the 0.45μm membrane filter liquid organic carbon content, or by 4000r/min transfer Supernatant after centrifugation 15min organic carbon content. 2.5 In strong acid and heating conditions, a certain amount of dichromate oxidation of reducing substances in water samples of the amount of oxidant consumed, can be expressed as millimoles per Oxygen milligrams (mg/mg) g of the test substance consumed.3 test substance informationa) organic carbon content; b) solubility in water; c) vapor pressure; d) foaming; e) microbial toxicity; f) adsorption; g) formula. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21816-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 21816-2008_English as soon as possible, and keep you informed of the progress. 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