GB/T 21805-2008 English PDFUS$509.00 ยท In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21805-2008: Chemicals -- Alga growth inhibition test Status: Valid
Basic dataStandard ID: GB/T 21805-2008 (GB/T21805-2008)Description (Translated English): Chemicals -- Alga growth inhibition test Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A80 Classification of International Standard: 13.300; 13.020.40 Word Count Estimation: 22,212 Date of Issue: 2008-05-12 Date of Implementation: 2008-09-01 Adopted Standard: OECD No.201-2006, 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 algae growth inhibition test methods outlined, test preparation, test procedures, quality assurance and quality control, data and reports. This standard applies to test experimental conditions water soluble chemicals. To test the volatility, strong adsorption, a color, insoluble or hardly soluble in water, chemicals, and may affect the efficient use of nutrients in the medium of chemicals, the need for modification of the test procedure. References [ 2 ], [ 3 ] and [ 4 ] provides some modifications. GB/T 21805-2008: Chemicals -- Alga growth inhibition 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. Alga growth inhibition test ICS 13.300; 13.020.40 A80 National Standards of People's Republic of China Chemicals algal growth inhibition 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. 201 (2006), "algal growth inhibition test Test "(in English). This standard made the following editorial changes. --- The units of measurement to our legal units of measurement. --- The original terms and definitions in Appendix 1 is adjusted to the body. --- The original contents of Appendix 4 to adjust to the body of the pre-culture stock cultures of algae 6.1.2 and 6.1.3 algae. --- Remove the original in Appendix 2 "algae sources" related content. This standard Annex A, Annex B and Annex C is informative appendix. 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. Shenyang Research Institute of Chemical Safety Evaluation Center, Shanghai Testing Center, Shanghai Academy of Environmental Sciences. The main drafters of this standard. Zhou Hong, Kan Xiaodong Ma Xin, Cailei Ming, Zhao Yuyan, Rong Zhiyi, Shen Xiang root. Chemicals algal growth inhibition test1 ScopeThis standard specifies the method of chemical algae growth inhibition test summary, test preparation, test procedures, quality assurance and quality control, Data and reports. This standard applies to the test under the test conditions of water-soluble chemicals. If you want to test volatile, strongly adsorbing, colored, insoluble or difficult Water-soluble chemicals, and may affect the nutrient medium, the effective use of chemicals, we need to modify the test procedure (Such as the use of a closed system, the appropriate test vessel). Reference [2], [3] and [4] provides a partial modification.2 Terms and definitionsThe following terms and definitions apply to this standard. 2.1 Dry unit volume of test medium weight of living organisms, such as algae milligrams per liter of test solution. Biomass is usually defined as the mass, but This standard is defined as the mass per unit volume, and to determine the number of cells per unit volume or fluorescent and other alternative measuring biomass. 2.2 Ratio of the standard deviation from the mean, usually expressed as a percentage, referred to as CV%. The coefficient of variation is a dimensionless number, thus facilitating comp This compared with each other between. Each parallel control group, the average coefficient of variation than the average growth rate is calculated as follows. a) were calculated for each phase of each parallel test average specific growth rate; b) calculation of the various stages of the test group than the average of all parallel mean coefficient of variation of the growth rate. 2.3 Effect Concentration EC x0 And based on the growth of E y C points. 2.4 Liquid or gel substance containing specific nutrients. Algae grown in culture and exposed to the test substance. Usually dissolved test substance In the medium. 2.5 That is the average specific growth rate (averagespecificgrowthrate), the algal biomass during the exponential growth rate exposure. 2.6 All test concentration could be observed at the LOEC same or more severe toxic effects with the LOEC. If the above conditions are not met, It should be described in detail on the LOEC (and NOEC) choice. 2.7 Directly below the lowest observed effect concentration (LOEC) set the concentration of the test substance. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21805-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 21805-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 21805-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21805-2008_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. 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