標準解讀

《GB/T 44707-2024 化學品 強化快速生物降解性試驗》是一項國家標準,旨在規(guī)定一種評估化學品在特定條件下是否能夠被微生物迅速降解的方法。該標準適用于各種有機化合物,通過模擬自然環(huán)境中可能存在的條件來測試物質的生物降解性能。

標準中詳細描述了實驗所需材料、設備以及具體的步驟流程。首先,在準備階段,需要選擇合適的接種物(如活性污泥)作為微生物源,并確保其具有足夠的活性;其次,定義了測試溶液中待測物的濃度范圍和pH值等參數要求;此外,還指定了如何控制溫度、攪拌速度等因素以保證實驗條件的一致性和可重復性。

對于實際操作過程,《GB/T 44707-2024》給出了明確指導:包括但不限于使用密封瓶或反應器進行培養(yǎng)、定期取樣分析目標化合物濃度變化情況、記錄相關數據等環(huán)節(jié)。整個試驗周期通常設定為28天,在此期間內監(jiān)測并記錄待測化學品的質量損失百分比或其他指示生物降解程度的指標。

根據最終獲得的數據結果,如果某種化學品能夠在規(guī)定時間內達到一定比例以上的降解率,則認為該物質具備良好的快速生物降解特性。反之,則表明其不易于通過自然界中的微生物作用而被分解。這種評價方法有助于識別那些對環(huán)境友好且易于處理的化學物質,同時也為制定更加科學合理的環(huán)境保護措施提供了依據。


如需獲取更多詳盡信息,請直接參考下方經官方授權發(fā)布的權威標準文檔。

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文檔簡介

ICS

13.300

CCS

A80

中華人民共和國國家標準

GB/T44707—2024

化學品強化快速生物降解性試驗

Chemicals—Enhancedreadybiodegradabilitytest

2024-10-26發(fā)布2025-05-01實施

國家市場監(jiān)督管理總局發(fā)布

國家標準化管理委員會

GB/T44707—2024

目次

前言

·····································································································

引言

·····································································································

1

范圍

··································································································

1

2

規(guī)范性引用文件

······················································································

1

3

術語和定義

···························································································

1

4

方法概述

······························································································

2

4.1

原理

······························································································

2

4.2

方法選擇

·························································································

2

5

受試物信息

···························································································

2

6

參比物

································································································

3

7

試驗準備

······························································································

3

7.1

儀器設備

·························································································

3

7.2

試驗用水和培養(yǎng)基

···············································································

3

7.3

接種物

···························································································

3

8

試驗程序

······························································································

4

8.1

強化條件

·························································································

4

8.2

受試物的添加

····················································································

4

8.3

試驗操作

·························································································

4

9

質量保證與質量控制

·················································································

4

10

數據

·································································································

5

11

結果報告

····························································································

5

參考文獻

··································································································

6

GB/T44707—2024

前言

本文件按照GB/T1.1—2020《標準化工作導則第1部分:標準化文件的結構和起草規(guī)則》的規(guī)

定起草。

本文件與GB/T27850《化學品快速生物降解性通則》、GB/T21801《化學品快速生物降解

性呼吸計量法試驗》、GB/T21802《化學品快速生物降解性改進的MITI試驗(Ⅰ)》、GB/T21803

《化學品快速生物降解性DOC消減試驗》、GB/T21831《化學品快速生物降解性:密閉瓶法試

驗》、GB/T21856《化學品快速生物降解性二氧化碳產生試驗》和GB/T21857《化學品快速

生物降解性改進的OECD篩選試驗》配套使用。

請注意本文件的某些內容可能涉及專利。本文件的發(fā)布機構不承擔識別專利的責任。

本文件由全國危險化學品管理標準化技術委員會(SAC/TC251)提出并歸口。

本文件起草單位:廣東省科學院微生物研究所(廣東省微生物分析檢測中心)、生態(tài)環(huán)境部固體廢

物與化學品管理技術中心、中檢科健(天津)檢驗檢測有限責任公司、路博潤管理(上海)有限公司、

上海市檢測中心、生態(tài)環(huán)境部南京環(huán)境科學研究所、上海化工院檢測有限公司、沈陽沈化院測試技術有

限公司、中國合格評定國家認可中心、萬華化學集團股份有限公司、福斯?jié)櫥停ㄖ袊┯邢薰尽⒛?/p>

特科技有限公司。

本文件主要起草人:許玫英、梅承芳、吳孝槐、鄧桂榮、劉純新、曾國驅、羅鳳娟、周麗麗、

滕曉明、邢維龍、舒耀皋、戎志毅、葉芷君、楊雪菲、周彬彬、孫帥、喬建成。

GB/T44707—2024

引言

當化合物在快速生物降解性試驗中表現為不具有快速生物降解性時,需要進一步開展更多的篩選性

降解試驗,如強化快速生物降解性試驗、固有生物降解性試驗等,以識別是否具有潛在的持久性。推薦

采用強化快速生物降解性試驗評估持久性,其方法選擇更廣、優(yōu)化條件更全面。

本文件與快速生物降解性通則(GB/T27850)及任一快速生物降解性試驗方法(GB/T21801、

GB/T21802、GB/T21803、GB/T21831、GB/T21856、GB/T21857和OECD化學品測試導則

No.310)聯合使用,將所選用的快速生物降解性試驗標準作為基礎方法,通過對一個或多個試驗條件

進行強化開展測試。除本文件描述的內容之外,其他試驗內容和要求見所選用的方法標準。

如采用本文件通過預暴露接種物或增加接種物濃度開展測試并將獲得的數據用于監(jiān)管時,需考慮試

驗結果是否充分且有效。

GB/T44707—2024

化學品強化快速生物降解性試驗

1范圍

本文件描述了化學品強化快速生物降解性試驗的方法概述、受試物信息、參比物、試驗準備、試驗

程序、質量保證與質量控制、數據、結果報告。

本文件適用于化學品的強化快速生物降解性試驗。

2規(guī)范性引用文件

下列文件中的內容通過文中的規(guī)范性引用而構成本文件必不可少的條款。其中,注日期的引用文

件,僅該日期對應的版本適用于本文件;不注日期的引用文件,其最新版本(包括所有的修改單)適用

于本文件。

GB/T21801化學品快速生物降解性呼吸計量法試驗

GB/T21802化學品快速生物降解性改進的MITI試驗(Ⅰ)

GB/T21803化學品快速生物降解性DOC消減試驗

GB/T21831化學品快速生物降解性:密閉瓶法試驗

GB/T21856化學品快速生物降解性二氧化碳產生試驗

GB/T21857化學品快速生物降解性改進的OECD篩選試驗

GB/T27850化學品快速生物降解性通則

OECD化學品測試導則No.310

快速生物降解性?密閉瓶二氧化碳法(頂

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