標(biāo)準(zhǔn)解讀

《GB/T 44707-2024 化學(xué)品 強(qiáng)化快速生物降解性試驗(yàn)》是一項(xiàng)國家標(biāo)準(zhǔn),旨在規(guī)定一種評估化學(xué)品在特定條件下是否能夠被微生物迅速降解的方法。該標(biāo)準(zhǔn)適用于各種有機(jī)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(zhì)的生物降解性能。

標(biāo)準(zhǔn)中詳細(xì)描述了實(shí)驗(yàn)所需材料、設(shè)備以及具體的步驟流程。首先,在準(zhǔn)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(shù)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(shí)驗(yàn)條件的一致性和可重復(fù)性。

對于實(shí)際操作過程,《GB/T 44707-2024》給出了明確指導(dǎo):包括但不限于使用密封瓶或反應(yīng)器進(jìn)行培養(yǎng)、定期取樣分析目標(biāo)化合物濃度變化情況、記錄相關(guān)數(shù)據(jù)等環(huán)節(jié)。整個試驗(yàn)周期通常設(shè)定為28天,在此期間內(nèi)監(jiān)測并記錄待測化學(xué)品的質(zhì)量損失百分比或其他指示生物降解程度的指標(biāo)。

根據(jù)最終獲得的數(shù)據(jù)結(jié)果,如果某種化學(xué)品能夠在規(guī)定時間內(nèi)達(dá)到一定比例以上的降解率,則認(rèn)為該物質(zhì)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(xué)物質(zhì),同時也為制定更加科學(xué)合理的環(huán)境保護(hù)措施提供了依據(jù)。


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文檔簡介

ICS

13.300

CCS

A80

中華人民共和國國家標(biāo)準(zhǔn)

GB/T44707—2024

化學(xué)品強(qiáng)化快速生物降解性試驗(yàn)

Chemicals—Enhancedreadybiodegradabilitytest

2024-10-26發(fā)布2025-05-01實(shí)施

國家市場監(jiān)督管理總局發(fā)布

國家標(biāo)準(zhǔn)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(shù)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(yàn)準(zhǔn)備

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

3

7.1

儀器設(shè)備

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

3

7.2

試驗(yàn)用水和培養(yǎng)基

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

3

7.3

接種物

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

3

8

試驗(yàn)程序

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

4

8.1

強(qiáng)化條件

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

4

8.2

受試物的添加

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

4

8.3

試驗(yàn)操作

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

4

9

質(zhì)量保證與質(zhì)量控制

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

4

10

數(shù)據(jù)

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

5

11

結(jié)果報告

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

5

參考文獻(xiàn)

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

6

GB/T44707—2024

前言

本文件按照GB/T1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則第1部分:標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)

定起草。

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

性呼吸計(jì)量法試驗(yàn)》、GB/T21802《化學(xué)品快速生物降解性改進(jìn)的MITI試驗(yàn)(Ⅰ)》、GB/T21803

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

驗(yàn)》、GB/T21856《化學(xué)品快速生物降解性二氧化碳產(chǎn)生試驗(yàn)》和GB/T21857《化學(xué)品快速

生物降解性改進(jìn)的OECD篩選試驗(yàn)》配套使用。

請注意本文件的某些內(nèi)容可能涉及專利。本文件的發(fā)布機(jī)構(gòu)不承擔(dān)識別專利的責(zé)任。

本文件由全國危險化學(xué)品管理標(biāo)準(zhǔn)化技術(shù)委員會(SAC/TC251)提出并歸口。

本文件起草單位:廣東省科學(xué)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(xué)品管理技術(shù)中心、中檢科?。ㄌ旖颍z驗(yàn)檢測有限責(zé)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(xué)研究所、上海化工院檢測有限公司、沈陽沈化院測試技術(shù)有

限公司、中國合格評定國家認(rèn)可中心、萬華化學(xué)集團(tuán)股份有限公司、福斯?jié)櫥停ㄖ袊┯邢薰?、?/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(qū)、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(dāng)化合物在快速生物降解性試驗(yàn)中表現(xiàn)為不具有快速生物降解性時,需要進(jìn)一步開展更多的篩選性

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

采用強(qiáng)化快速生物降解性試驗(yàn)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(yàn)方法(GB/T21801、

GB/T21802、GB/T21803、GB/T21831、GB/T21856、GB/T21857和OECD化學(xué)品測試導(dǎo)則

No.310)聯(lián)合使用,將所選用的快速生物降解性試驗(yàn)標(biāo)準(zhǔn)作為基礎(chǔ)方法,通過對一個或多個試驗(yàn)條件

進(jìn)行強(qiáng)化開展測試。除本文件描述的內(nèi)容之外,其他試驗(yàn)內(nèi)容和要求見所選用的方法標(biāo)準(zhǔn)。

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

驗(yàn)結(jié)果是否充分且有效。

GB/T44707—2024

化學(xué)品強(qiáng)化快速生物降解性試驗(yàn)

1范圍

本文件描述了化學(xué)品強(qiáng)化快速生物降解性試驗(yàn)的方法概述、受試物信息、參比物、試驗(yàn)準(zhǔn)備、試驗(yàn)

程序、質(zhì)量保證與質(zhì)量控制、數(shù)據(jù)、結(jié)果報告。

本文件適用于化學(xué)品的強(qiáng)化快速生物降解性試驗(yàn)。

2規(guī)范性引用文件

下列文件中的內(nèi)容通過文中的規(guī)范性引用而構(gòu)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(yīng)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(xué)品快速生物降解性呼吸計(jì)量法試驗(yàn)

GB/T21802化學(xué)品快速生物降解性改進(jìn)的MITI試驗(yàn)(Ⅰ)

GB/T21803化學(xué)品快速生物降解性DOC消減試驗(yàn)

GB/T21831化學(xué)品快速生物降解性:密閉瓶法試驗(yàn)

GB/T21856化學(xué)品快速生物降解性二氧化碳產(chǎn)生試驗(yàn)

GB/T21857化學(xué)品快速生物降解性改進(jìn)的OECD篩選試驗(yàn)

GB/T27850化學(xué)品快速生物降解性通則

OECD化學(xué)品測試導(dǎo)則No.310

快速生物降解性?密閉瓶二氧化碳法(頂

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