热解-GC/MS区分聚和检测添加剂,以改善对织品标签准确度和塑料污染的监测
Josh Forakis1, Jennifer Lynch2,3
1Center for Marine Debris Research, Hawaii Pacific University, 41-202 Kalanianaole Hwy #9, Waimanalo, HI, 96744, USA. jforakis@hpu.edu.
Analytical and bioanalytical chemistry
|March 31, 2025
概括
聚产品经常被错误标记,并且可能含有酸盐添加剂. 这项研究使用了热解气色谱法/质谱法来分析家用聚物品,揭示了常见的错误识别和甲的存在.
科学领域:
- 聚合物科学 聚合物科学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 聚纤维是微塑料污染和织废物的主要来源.
- 商业聚成分往往是专有产品,聚乙烯二甲 (PET) 是假定的标准.
- 聚合物除了PET之外还包括一系列的聚合物,包括PBT,PCT,PEN和可生物降解的变种.
研究的目的:
- 为了确定家用聚产品的实际聚合物组成.
- 为了验证聚制品的产品标签的准确性.
- 为了识别消费用聚产品中酸盐添加剂的存在和类型.
主要方法:
- 使用双拍热解气色谱/质谱 (Py-GC/MS) 进行聚合物分析.
- 分析了科学级聚标准,制造商级纤维/颗粒和消费品.
- 用于材料识别和添加剂检测的解读的火相图和热溶解染色图.
主要成果:
- 主要确定样品为PET (87.4%),但发现了其他聚合物 (n=5),非聚合物聚合物 (n=9) 和PET混合物 (n=23).
- 在23.3%的消费品中检测到甲基甲酸盐,包括儿童玩具.
- 经验数据证实,标有"聚"的产品并不总是PET,而且经常含有酸盐添加剂.
结论:
- 所有标有"聚"的产品都是PET的假设是不准确的.
- 准确的聚合物识别需要对具有良好特征的材料进行全面的光谱库.
- 聚酸盐是家用聚产品中常见的添加剂,突出了潜在的健康和环境问题.
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