A method for the determination of triazine herbicides in water samples was established by magnetic effervescence tablet-assisted switchable hydrophilicity solvent-based liquid phase microextraction procedure (META-SHS-LPME) coupled with high-performance liquid chromatography with diode array detection. The magnetic effervescence tablet, composed of citric acid, sodium hexanoate, sodium bicarbonate, and Fe₃O₄ nanoparticles, combined extractant generation, dispersion, and magnetic recovery into one step. Citric acid could react with sodium hexanoate and sodium bicarbonate to generate hexanoic acid and carbon dioxide in situ, respectively. Carbon dioxide bubbles assisted the eco-friendly extractant hexanoic acid to fully contact with target compounds. Fe₃O₄ nanoparticles containing extractant and triazine herbicides were isolated from the sample solution using an external magnet. Good linearity was achieved in the range of 50–5000 ng mL⁻¹ with a correlation coefficient greater than 0.997. The limit of detection was within 0.10–0.13 ng mL⁻¹. The extraction recovery of triazine herbicides were 81.4–96.7% in well, pond, and river waters. Overall, the proposed method was a simple, efficient, and eco-friendly analytical approach for determining triazine herbicide residues in water samples.

建立了磁泡片剂辅助可切换亲水性溶剂型液相微萃取法（META-SHS-LPME）结合高效液相色谱-二极管阵列检测法测定水样中三嗪类除草剂的方法。由柠檬酸，己酸钠，碳酸氢钠和Fe ₃ O ₄纳米粒子组成的磁泡片剂，将萃取剂的产生，分散和磁回收结合在一起，成为一个步骤。柠檬酸可以与己酸钠和碳酸氢钠反应，分别原位生成己酸和二氧化碳。二氧化碳气泡帮助环保提取剂己酸与目标化合物充分接触。铁使用外部磁体从样品溶液中分离出含有萃取剂和三嗪除草剂的₃ O ₄纳米颗粒。在50–5000 ng mL ^-1的范围内实现了良好的线性，相关系数大于0.997。检测限在0.10–0.13 ng mL ^-1之内。在井，池塘和河水中，三嗪类除草剂的提取回收率为81.4–96.7％。总体而言，该方法是测定水样中三嗪除草剂残留的简单，高效且环保的分析方法。