GB/T 19276.2-2003 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 19276.2-2003: Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium -- Method by analysis of evolved carbon dioxide Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 19276.2-2003: Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium -- Method by analysis of evolved carbon dioxide---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19276.2-2003 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.080.01 G 31 GB/T 19276.2-2003 / ISO 14852:1999 Determination of the Ultimate Aerobic Biodegradability of Plastic Materials in an Aqueous Medium – Method by Analysis of Evolved Carbon Dioxide (ISO 14852:1999, IDT) ISSUED ON: AUGUST 25, 2003 IMPLEMENTED ON: FEBRUARY 01, 2004 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC Table of ContentsForeword ... 3 Introduction ... 4 1 Scope ... 5 2 Normative References ... 6 3 Terms and Definitions ... 6 4 Principle ... 8 5 Test Environment ... 8 6 Reagents ... 9 7 Apparatus ... 12 8 Procedure ... 13 9 Calculation and Expression of Results ... 17 10 Validity of Results ... 19 11 Test Report ... 19 Appendix A (Informative) Principle of a System for Measuring Evolved Carbon Dioxide (Example) ... 21 Annex B (Informative) Examples of Methods for the Determination of Evolved Carbon Dioxide ... 23 Annex C (Informative) Example of the Determination of a Carbon Balance .. 26 Annex D (Informative) Example of a Determination of the Amount of Water- Insoluble Polymer Remaining at the End of a Biodegradation Test and the Molecular Mass of the Polymer ... 29ForewordThis Standard equivalently adopts ISO 14852:1999 Determination of Ultimate Aerobic Biodegradability of Plastic Materials in an Aqueous Medium – Method by Analysis of Evolved Carbon Dioxide (English Edition). The National Plastics Standardization Center Biodegradable Materials Working Group conducted a series of laboratory tests from 1999 to 2002, and developed this Standard on the basis of verification tests. The Annexes A, B, C, D of this Standard are informative. This Standard was proposed by China Light Industry Council. This Standard shall be under the jurisdiction of National Technical Committee for Standardization of Plastics. Drafting organization of this Standard: Tianjin Danhai Co., Ltd. Participating drafting organizations of this Standard: Shenzhen Lvwei Technologies Co., Ltd.; Wuhan Huali Environment Protection Science Technology Co., Ltd.; Ningbo Tianan Biologic Material Co., Ltd.; Inner Mongolia Mengxi High-Tech Group Co., Ltd.; and China National Center for Quality Supervision and Test of Plastic Products. Chief drafting staffs of this Standard: Weng Yunxuan, Liu Jiapan, Chen Jiaqi, Yang Huidi, Xu Fengxia, Kong Li, Zhang Xianbing, Wang Shihe, Chen Xuejun, Ye Xinjian, Mao Guoyu, Liu Caixia. Determination of the Ultimate Aerobic Biodegradability of Plastic Materials in an Aqueous Medium – Method by Analysis of Evolved Carbon Dioxide1 ScopeThis Standard specifies a method, by measuring the amount of carbon dioxide evolved, for the determination of the degree of aerobic biodegradability of plastic materials, including those containing formulation additives. The test material is exposed in a synthetic medium under laboratory conditions to an inoculum from activated sludge, compost or soil. If an un-adapted activated sludge is used as the inoculum, the test simulates the biodegradation processes which occur in a natural aqueous environment; if a mixed or pre-exposed inoculum is used, the method can be used to investigate the potential biodegradability of a test material. The conditions used in this Standard do not necessarily correspond to the optimum conditions allowing maximum biodegradation to occur, but the standard is designed to determine the potential biodegradability of plastic materials or give an indication of their biodegradability in natural environments. The method enables the assessment of the biodegradability to be improved by calculating a carbon balance (optional, see Annex C). The method applies to the following materials: --- Natural and/or synthetic polymers, copolymers or mixtures thereof. --- Plastic materials which contain additives such as plasticizers, colorants or other compounds. --- Water-soluble polymers. --- Materials which, under the test conditions, do not inhibit the microorganisms present in the inoculum. Inhibitory effects can be determined using an inhibition control or by another appropriate method. If the test material is inhibitory to the inoculum, a lower test concentration, another inoculum or a pre-exposed inoculum can be used. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 19276.2-2003 be delivered?Answer: The full copy PDF of English version of GB/T 19276.2-2003 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 19276.2-2003_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 19276.2-2003_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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