Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.
Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.
Anal Chem. 2022 Jun 28;94(25):9065-9073. doi: 10.1021/acs.analchem.2c01301. Epub 2022 Jun 13.
A chain-shattering polymer (CSP) has been proposed as a microdispersive solid-phase extraction (μdSPE) sorbent in a proof-of-concept study of degradable materials for analytical purposes. The responsive CSP was synthesized from 1,3,5-tris(bromomethyl)-2-nitrobenzene acting as the self-immolative trigger responsive unit and 2,6-naphthalenedicarboxylic acid as aromatic linker to enhance noncovalent aromatic interactions with the analytes. The CSP was characterized and applied as a μdSPE sorbent of a group of plasticizers, which were selected as model analytes, from different types of environmental water samples (tap, waste, and spring waters). Gas chromatography coupled to mass spectrometry detection was used for analyte determination. Mean recovery values were in the range of 80%-118% with RSD values below 22%. After the extraction, the polymer could be efficiently degraded by UV irradiation or by chemical reduction, recovering the aromatic linker. This work has proved the potential of CSPs as recyclable sorbents, paving the way to more environmentally benign analytical procedures.
一种链式断裂聚合物（CSP）已被提议作为一种用于分析目的的可降解材料的微分散固相萃取（μdSPE）吸附剂，在概念验证研究中得到了证明。响应性 CSP 是由 1,3,5-三（溴甲基）-2-硝基苯作为自毁触发响应单元和 2,6-萘二甲酸作为芳族连接体合成的，以增强与分析物的非共价芳族相互作用。CSP 进行了表征，并作为一种 μdSPE 吸附剂，用于从不同类型的环境水样（自来水、废水和泉水）中提取一组增塑剂（选择作为模型分析物）。气相色谱-质谱联用检测用于分析物的测定。平均回收率在 80%-118%之间，相对标准偏差（RSD）值低于 22%。萃取后，聚合物可通过紫外线照射或化学还原有效降解，回收芳族连接体。这项工作证明了 CSP 作为可回收吸附剂的潜力，为更环保的分析方法铺平了道路。
