DB43/T 3188—2025 I 目 次 前言 ································ ································ ································ ························ Ⅲ 1 范围 ································ ································ ································ ······················ 1 2 规范性引用文件 ································ ································ ································ ······· 1 3 术语和定义 ································ ································ ································ ············· 1 4 2-甲基-1,3-丁二烯含量的测定 ································ ································ ··················· 1 4.1 原理 ································ ································ ································ ··············· 1 4.2 试剂和材料 ································ ································ ································ ····· 1 4.3 仪器和设备 ································ ································ ································ ····· 2 4.4 分析步骤 ································ ································ ································ ········ 2 4.5 分析结果的表述 ································ ································ ······························· 3 4.6 精密度 ································ ································ ································ ············ 3 4.7 检出限和定量限 ································ ································ ······························· 3 5 2-甲基-1,3-丁二烯迁移量的测定 ································ ································ ················ 4 5.1 原理 ································ ································ ································ ··············· 4 5.2 试剂和材料 ································ ································ ································ ····· 4 5.3 仪器和设备 ································ ································ ································ ····· 5 5.4 分析步骤 ································ ································ ································ ········ 5 5.5 分析结果的表述 ································ ································ ······························· 6 5.6 精密度 ································ ································ ································ ············ 6 5.7 检出限和定量限 ································ ································ ······························· 6 附录A（资料性） 2-甲基-1,3-丁二烯标准样品色谱图 ································ ························ 7 DB43/T 3188—2025 II DB43/T 3188—2025 III 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第1部分：标准化文件的结构和起草规则》的规定 起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。 本文件由湖南省市场监督管理局提出。 本文件由湖南省食品接触材料标准化技术委员会归口。 本文件起草单位：湖南省产商品质量检验研究院、中南林业科技大学、湖南省产商品评审中心、 长沙市食品药品检验所、湖南省长城铭泰新材料科技有限公司。 本文件主要起草人：柳阿芳、万富、李政、曾小明、康峰、赵金尧、王凯、刘洋、沈明军、李登、 陈薇、陈然兵、刘璞、冉丹、王莉、丁亚芳、李祎洁、李厚、王慧、罗静、杨望、曹滔涛、戴金凤、 夏钟上、宁静、谢俊、陈先桂、朱俞翰。 DB43/T 3188—2025 IV DB43/T 3188—2025 1 食品接触材料及制品中 2-甲基-1,3-丁二烯含量和迁移量的测定 1 范围 本文件规定了食品接触材料及制品中 2-甲基-1,3-丁二烯含量的测定方法和迁移量的测定方法。 本文件适用于食品接触材料及制品中 2-甲基-1,3-丁二烯含量的测定和迁移量的测定。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。 其中， 注日期的引用文件， 仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本 文件。 GB 5009.156 食品安全国家标准 食品接触材料及制品迁移试验预处理方法通则 GB/T 6682 分析实验室用水规格和试验方法 GB 31604.1 食品安全国家标准 食品接触材料及制品迁移试验通则 3 术语和定义 本文件没有需要界定的术语和定义。 4 2-甲基-1,3-丁二烯含量的测定 4.1 原理 食品接触材料及制品经 N，N-二甲基甲酰胺溶解或分散于顶空瓶中，加热使待测成分达到气液平衡， 然后定量吸取顶空气进行气相色谱测定。根据保留时间定性， n-戊烷作为内标物，以内标法定量。 4.2 试剂和材料 除非另有说明，本方法所用试剂均为分析纯，水为 GB/T 6682 规定的一级水。 4.2.1 试剂 N,N-二甲基甲酰胺（ DMF） ，分析纯，在 2-甲基-1,3-丁二烯和 n-戊烷保留时间处无干扰峰。 4.2.2 标准品 4.2.2.1 2-甲基-1,3-丁二烯（ C5H8，CAS号：78-79-5） ，纯度≥ 99.5％，或经国家认证并授予标准物质 证书的标准物质。 4.2.2.2 n-戊烷（C5H12，CAS号：109-66-0） ，纯度≥ 99.5％，或经国家认证并授予标准物质证书的标 准物质。 DB43/T 3188—2025 2 4.2.3 2-甲基-1,3-丁二烯标准溶液配制 4.2.3.1 2-甲基-1,3-丁二烯标准贮备液（ 2000 mg/L ） ：量取约 20 mL N,N -二甲基甲酰胺于 25 mL容量 瓶中，带塞称重（精确至 0.000 1g） 。再加入 2-甲基-1,3-丁二烯约 50 mg，重新称量（精确至 0.000 1g）。 用N,N-二甲