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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
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| GB/T 36700.8-2018 | English | 279 |
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Chemicals -- Guidance on hazard classification to the aquatic environment -- Part 8: Guidance on transformation/dissolution of metals and metal compounds in aqueous media
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GB/T 36700.8-2018
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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
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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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