Conventional magnetic effervescent tablet has many drawbacks, such as not practicable for field processing, rapid moisture absorption, and poor tablet storage characteristics. Herein, we developed a novel magnetic effervescent tablet containing ionic liquid microextraction (MET-ILM) for determination of pyrethroids in dairy milk. It contains only Na₂CO₃ as an alkali source (no acidic source) in the Fe₃O₄ magnetic tablet; the CO₂-forming reaction is initiated in the acidic solution containing the analytes, and thus the prepared tablet can be stored for long time periods without deterioration. The combined action of extractant and sorbent vastly increase the extraction efficiency. The optimized procedure consisted of an effervescent tablet, 2:1 HCl:Na₂CO₃, and 60 μL [C₆MIM]PF₆ as extraction solvent. The LODs for five pyrethroids were 0.024–0.075 μg kg⁻¹ with recoveries of 78.3–101.8%. The RSDs were <4.8% and <6.3% for intra- and inter-day precisions. Overall, the method is very feasible for use in the field.

常规的磁性泡腾片具有许多缺点，例如在现场处理中不可行，快速吸收水分和不良的片剂储存特性。本文中，我们开发了一种新型的含离子液体微萃取（MET-ILM）的磁泡腾片，用于测定乳汁中的拟除虫菊酯类化合物。在Fe ₃ O ₄磁片中，它仅包含Na ₂ CO ₃作为碱源（无酸性源）；一氧化碳₂在含有分析物的酸性溶液中开始形成反应，因此可以将制得的片剂长时间保存而不会劣化。萃取剂和吸附剂的共同作用大大提高了萃取效率。优化的程序包括泡腾片，2：1 HCl：Na ₂ CO ₃和60μL[C ₆ MIM] PF ₆作为萃取溶剂。五个拟除虫菊酯的检测限为0.024–0.075μgkg ^-1，回收率为78.3–101.8％。日内和日间精度的RSD分别为<4.8％和<6.3％。总体而言，该方法在现场使用是非常可行的。