GB/T 36700.8-2018 English PDF

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GB/T 36700.8-2018: Chemicals -- Guidance on hazard classification to the aquatic environment -- Part 8: Guidance on transformation/dissolution of metals and metal compounds in aqueous media
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 36700.8-2018	279	Add to Cart	3 days	Chemicals -- Guidance on hazard classification to the aquatic environment -- Part 8: Guidance on transformation/dissolution of metals and metal compounds in aqueous media	Valid

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Basic data

Standard ID: GB/T 36700.8-2018 (GB/T36700.8-2018)
Description (Translated English): Chemicals -- Guidance on hazard classification to the aquatic environment -- Part 8: Guidance on transformation/dissolution of metals and metal compounds in aqueous media
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 14,176
Date of Issue: 2018-09-17
Date of Implementation: 2019-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 36700.8-2018: Chemicals -- Guidance on hazard classification to the aquatic environment -- Part 8: Guidance on transformation/dissolution of metals and metal compounds in aqueous media

---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 - Guidance on hazard classification to the aquatic environment - Part 8. Guidance on transformation/dissolution of metals and metal compounds in aqueous media ICS 13.300 A80 National Standards of People's Republic of China Chemical aquatic environmental hazard classification guide Part 8. Metals and metal compounds Conversion/dissolution guidance in aqueous media Part 8.Guidanceontransformation/dissolutionof Published on.2018-09-17 2019-01-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

GB/T 36700 "Chemical Aquatic Environmental Hazard Classification Guidance" is divided into the following eight parts. --- Part 1. Introduction; --- Part 2. Unified classification method; ---Part 3. Aquatic toxicity; --- Part 4. Degradation; --- Part 5. Bioconcentration; --- Part 6. Quantitative structure activity relationship (QSAR); --- Part 7. Classification of metals and metal compounds; --- Part 8. Guidance for the conversion/dissolution of metals and metal compounds in aqueous media. This part is the eighth part of GB/T 36700. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed and managed by the National Technical Committee for Standardization of Hazardous Chemicals Management (SAC/TC251). This section drafted by. Anhui Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Ministry of Environmental Protection Solid Waste and Chemicals Management Technology Center, Hefei University of Technology, China Chemical Industry and Technology Development Center, Shanghai Chemical Research Institute Co., Ltd., Huafeng Group Co., Ltd., Beijing Guoshi Ankang Technology Co., Ltd., Jiangsu Chengxing Phosphorus Chemical Co., Ltd. The main drafters of this section. Wen Jinsong, Lu Ling, Ke Yunhui, Han Fang, Zhang Lei, Yan Xuedong, Wang Xinchen, Ma Jiale, Sun Wei, Liu Hongying, Cao Mengran, Zhou Qingyun.

Introduction

This part of GB/T 36700 provides guidance on how to perform conversion/dissolution tests, which are intended for standard laboratory conditions. Determination of the rate at which metals and sparingly soluble metal compounds form ions and metal solubles in aqueous media that represent the natural environmental conditions of nature degree. The results of the assay can be used to assess acute and chronic aquatic toxicity. Compare metal ions produced by conversion or dissolution in a standard aqueous medium Degree, as well as standard ecotoxicity data (acute and chronic toxicity values) obtained from metal salt solutions, for metals and sparingly soluble metal compounds Classification of acute and chronic aquatic toxicity. For the method of using the obtained results to classify aquatic environmental hazards, see GB/T 36700.7. Chemical aquatic environmental hazard classification guide Part 8. Metals and metal compounds Conversion/dissolution guidance in aqueous media

1 Scope

This part of GB/T 36700 specifies the basic principle for determining the conversion/dissolution test method for metals and metal compounds in aqueous media. Test substance information, equipment and reagents, test preparation, test conditions, test procedures, and treatment and test reports of test results. This section applies to the guidance for the classification of chemical aquatic environmental hazards involving the conversion/dissolution of metals and metal compounds in aqueous media. This section does not apply to organometallic compounds.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 16125 Large cockroach acute toxicity test method ASTME 729-96 Standard Guide for Very Toxic Toxicity Tests on Fish, Large Invertebrates, and Amphibians (Standard Guideforconductingacutetoxicitytestsontestmaterialswithfishes,macroinvertebrates,andam- Phiibians)

3 Principle

3.1 Overview Stir a different amount of the test substance in a pH buffer and sample and analyze at a specified time interval to determine the metal in the solution Ion concentration. There are two types of tests, screening tests and complete tests. Screening tests are performed at a single concentration and are Compounds that are difficult to distinguish between their ecotoxic potential and dissolved state due to decomposition or rapid conversion are screened out. complete The purpose of the test is to determine the level of dissolution or conversion of the metal and metal compound in a different aqueous solution after a certain period of time. 3.2 Screening test For sparingly soluble metal compounds, determine the maximum solubility of the metal by determining the solubility limit, or according to the conversion/dissolution screening test. set. A slightly soluble metal compound having the smallest typical particle size was commercially available and added to water at a single test load of 100 mg/L. After 24h Stirring was continued to determine the concentration of metal ions. 3.3 Complete test 3.3.1 Add bulk and/or powder test substances to water at three different test loads of 1mg/L, 10mg/L and 100mg/L, The short-term conversion/dissolution test endpoint was determined by measuring the metal ion concentration after the 7-day conversion/dissolution test; by measuring 1 mg/L single The metal ion concentration after the 28-day conversion/dissolution test of the test load determines the end point of the long-term conversion/dissolution test. If dissolved metal is expected The substance will not be released in a large amount, and the test load can be selected only for 100 mg/L. Test using a stirring method that does not cause particulate matter to wear. 3.3.2 pH has a significant effect on conversion/dissolution, so both screening and complete tests should be performed at maximum metal ion concentration. ......

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