中国塑料 ›› 2025, Vol. 39 ›› Issue (1): 80-84.DOI: 10.19491/j.issn.1001-9278.2025.01.013

• 标准与测试 • 上一篇    下一篇

气相色谱同时测定饮用水瓶中IPA、EG、DEG含量的方法研究

叶淋泉(), 钱焘焘, 李融冰, 曾乐   

  1. 华润化学材料科技股份有限公司,江苏 常州 213033
  • 收稿日期:2024-04-12 出版日期:2025-01-26 发布日期:2025-02-14
  • 作者简介:叶淋泉(1986—),男,工程师,硕士,主要从事材料分析检测,yelinquan@foxmail.com
  • 基金资助:
    华材科技中心基础和创新研究项目(202319)

Study on simultaneous determination of IPA, EG, and DEG contents in drinking water bottles by gas chromatography

YE Linquan(), QIAN Taotao, LI Rongbing, ZENG Le   

  1. China Resources Chemical Innovative Materials Co,Ltd,Changzhou 213033,China
  • Received:2024-04-12 Online:2025-01-26 Published:2025-02-14

摘要:

建立气相色谱法(GC)对聚对苯二甲酸乙二醇酯(PET)瓶片中间苯二甲酸(IPA)、乙二醇(EG)、二甘醇(DEG)含量测试方法,经对IPA、EG、DEG检测方法系统性优化和验证,最终将其应用于饮用水瓶中IPA、EG、DEG的测试并比较了不同品牌饮用水瓶中的含量差异,结果表明11个不同品牌的16种饮用水瓶的DEG含量基本在1.15 %~1.44 %之间(均值1.30 %,RSD=7.5 %);EG含量基本在30.28 %~32.67 %之间(均值32.0 %,RSD=2.0 %);DEG均值与EG均值占比≈4 %;IPA的含量差异相对较大,从0.68 %~2.3 %之间均有分布,常见值在2.03 %±0.35 %。

关键词: 气相色谱仪, 间苯二甲酸, 乙二醇, 二甘醇, 饮用水瓶

Abstract:

In this study, a gas chromatographic method was established for the determination of the contents of terephthalic acid (IPA), ethylene glycol (EG) and diethylene glycol (DEG) in polyethylene terephthalate (PET) bottle slices. The optimized and validated method was employed to test the contents of IPA, EG, and DEG in drinking water bottles after. The results indicated that the DEG contents in 16 types of drinking water bottles from 11 different brands was in the range from 1.15 % to 1.44 % with a mean of 1.30 % and a RSD of 7.5 %. The contents of EG are distributed between 30.28% and 32.67 % along with a mean of 32.0 % and a RSD of 2.0 %. The proportion of DEG to EG means was around 4 %. The content of IPA showed a relatively large difference ranging from 0.68 % to 2.3 % along with a common value of 2.03 %±0.35 %.

Key words: gas chromatography, terephthalic acid, ethylene glycol, diethylene glycol, drinking water bottles

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