GB/T 35518-2017 in English

VALID

hemicals—Inherent biodegradability in soil test

Issued on:2017-12-29
Implemented on:2018-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 35518-2017
Document status:	VALID
Title in English:	hemicals—Inherent biodegradability in soil test
Title in Chinese:	化学品土壤中的固有生物降解性试验
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-12-29
Implemented on:	2018-07-01
Chinese Classification:	A80-Marking, packaging, transport and storage in general
Professional Classification:	GB-National Standard
Related Topics:	degradation din biodegradable Chloride in Soil How much chloride is in the soil chemical step-by-step degradation Degradation test Most Chloride in Soil Intrinsic Biodegrader Biodegradation instrument In vivo degradability degradable chemicals biodegradability Intrinsic Biodegradability Test of Chemicals in Soil biodegradability toxic chemicals in water Soil organic carbon decomposition chemistry in life solid waste in soil Soil solid liquid biological sample degradation Organic Chemistry in My Eyes soil digester chemical composition of soil Strong degradation test fixation in chemistry Soil digestion tank The main chemical components of the soil Instruments in Biochemistry Soil half digestion Organic Chemistry of Drug Degradation bioorganic chemistry Decomposition of antimony in soil Organic Chemistry of Degradation Fluoride in Soil GBT35518 GB/T 35518-2017 inherent biodegradability chemical soil Chemical Properties of Monosaccharides in Advanced Food Chemistry soil dissolved organic carbon Fluoride testing in soil Evaluation of Sulfide in Soil Fluoride reference in soil Lead in soil British biodegradable Semi-solid testing methods for organic chemical products Soil dissolved organic carbon testing method Methods for lysing soil microorganisms What are the methods for soil digestion? Soil physiological and biochemical index testing charges Are there standards for soil fluoride? Soil degradation experiment industry iodide in soil

《GB/T 35518-2017化学品土壤中的固有生物降解性试验》由TC251（全国危险化学品管理标准化技术委员会）归口，TC251SC1（全国危险化学品管理标准化技术委员会化学品毒性检测分会）执行，主管部门为国家标准化管理委员会。

Introduction

1. Background and purpose of the standard

GB/T 35518-2017 "Test for inherent biodegradability of chemicals in soil" is formulated based on the test guidelines of the International Organization for Standardization (ISO) and the Organization for Economic Cooperation and Development (OECD), and aims to evaluate the mineralization capacity of chemicals under the action of soil microorganisms. This standard is applicable to the determination of the biodegradation characteristics of radiocarbon labeled compounds in soil.

2. Comparative analysis of standard frameworks

Standard dimensions	GB/T 35518—2017	OECD No.304 A	ISO reference standard
Test principle	Radioactive label-based mineralization method	Inherent biodegradability test	Soil microbial activity analysis
Scope of application	Applicable to volatile and non-volatile compounds	Limited to specific types of chemicals	General environmental testing
Quality Control Requirements	Strict Quality Assurance Process	Standard Deviation Analysis	Conventional Laboratory Testing

3. Test Methods and Procedures

3.1 Test Preparation

The test soil must meet the following conditions: pH range, organic carbon content and particle size distribution are all within the specified range. The soil must be pretreated before the test, including air drying, sieving and incubation.

3.2 Test Preparation

The radiolabeled compound must be prepared into a solution of a specific concentration and its vapor pressure must meet the test requirements. For highly toxic test substances, an additional microbial toxicity test is required.

3.3 Basic test operation

Put the prepared soil sample into the bio-meter bottle and add the radioactive labeled test solution. Regularly monitor the release of 14CO₂ by liquid scintillation counter and draw a time-mineralization rate curve.

3.4 Alternative test methods

Volatile substance test:Applicable to test substances with high vapor pressure, and polyurethane foam plug is required to absorb volatile components.
Residue analysis:When the 50% mineralization point is reached, extract the soluble and insoluble residues in the soil for radioactivity determination.

4. Implementation recommendations and precautions

In practical applications, it is recommended that:

Preferably select standardized soil samples to ensure test consistency.
Strictly control experimental conditions, including temperature (22°C±2°C) and lighting conditions (dark environment).
For highly toxic or volatile compounds, risk assessment should be conducted in advance.

More samples: GB 18306-2015 DL/T 5154-2012 JGJ 94-2008

Sample only — not a preview of GB/T 35518-2017

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