微塑料
萃取(化学)
化学
消化(炼金术)
色谱法
氢氧化钾
环境化学
过滤(数学)
降级(电信)
有机化学
电信
计算机科学
统计
数学
作者
Clara Lopes,V. Fernández-González,Soledad Muniategui-Lorenzo,Miguel Caetano,Joana Raimundo
标识
DOI:10.1016/j.marpolbul.2022.113911
摘要
Potassium hydroxide (KOH) digestion protocols are currently applied to separate microplastics from biological samples, allowing efficient digestion with minor degradation of polymers in a time- and cost-effective way. For biota samples with high-fat content, KOH reacts with triglycerides generating an overlying soap layer, making difficult the digestion and solubilization and subsequent microplastics extraction. Here we studied the addition of Tween-20 in different concentrations to evaluate the effect on the soap layer of post-digested samples. Addition of 10 % of Tween-20 presented higher flow rate during filtration, being set as optimal value. Incorporation of Tween-20 in the extraction procedure increased recovery rates of LDPE, PC and PET and appears to have a protective effect on PC and PET degradation. Tween-20 did not interfere in FTIR spectrum of polymers available in the marine environment. Being low-toxic, makes addition of Tween-20 a simple and economical way to optimize KOH digestion protocols for microplastics extraction.
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