Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040-900, SC, Brazil.
Instituto Federal Catarinense, Campus Brusque, 88350-300, Brazil.
Anal Chim Acta. 2017 Dec 15;996:29-37. doi: 10.1016/j.aca.2017.09.047. Epub 2017 Oct 15.
A sustainable approach to TF-SPME is presented using recycled diatomaceous earth, obtained from a beer purification process, as a green sorbent phase for the determination of bisphenol A (BPA), benzophenone (BzP), triclocarban (TCC), 4-methylbenzylidene camphor (4-MBC) and 2-ethylhexyl-p-methoxycinnamate (EHMC) in environmental water samples. TF-SPME was combined with a 96-well plate system allowing for high-throughput analysis due to the simultaneous extraction/desorption up to 96 samples. The proposed sorbent phase exhibited good stability in organic solvents, as well as satisfactory analytical performance. The optimized method consisted of 240 min of extraction at pH 6 with the addition of NaCl (15% w/v). A mixture of MeOH:ACN (50:50 v/v) was used for the desorption the analytes, using a time of 30 min. Limits of detection varied from 1 μg L for BzP and TCC to 8 μg L for the other analytes, and R ranged from 0.9926 for 4-MBC to 0.9988 for BPA. This novel and straightforward approach offers an environmentally-friendly and very promising alternative for routine analysis. . The total sample preparation time per sample was approximately 2.8 min, which is a significant advantage when a large number of analytical run is required.
本文提出了一种可持续的 TF-SPME 方法，使用从啤酒净化过程中获得的再循环硅藻土作为绿色吸附剂，用于测定环境水样中的双酚 A（BPA）、二苯甲酮（BzP）、三氯卡班（TCC）、4-甲基苄叉基樟脑（4-MBC）和 2-乙基己基-对甲氧基肉桂酸（EHMC）。TF-SPME 与 96 孔板系统相结合，由于可以同时提取/解吸多达 96 个样品，因此可以进行高通量分析。所提出的吸附剂在有机溶剂中表现出良好的稳定性，并且具有令人满意的分析性能。优化方法包括在 pH 6 下用 NaCl（15%w/v）提取 240 min。使用 MeOH:ACN（50:50 v/v）混合物在 30 min 内解吸分析物。检测限从 BzP 和 TCC 的 1μg L 到其他分析物的 8μg L 不等，R 值从 4-MBC 的 0.9926 到 BPA 的 0.9988。这种新颖而简单的方法为常规分析提供了一种环保且非常有前途的替代方法。每个样品的总样品制备时间约为 2.8 分钟，当需要进行大量分析运行时，这是一个显著的优势。
