A novel montmorillonite clay (MMT) bionanocomposite modified with chitosan (CH), carboxymethyl cellulose (CMC), and benzylimidazolium based dicationic ionic liquid with tetraethylene glycol linker (DIL) was fabricated on stainless steel wire by in situ process. The MMT–CH–CMC-DIL coated solid-phase microextraction (SPME) fiber was examined for the determination of organochlorine pesticides (OCPs) in real samples by HS-SPME-GC method using mass spectrometry (MS) and electron capture detector (ECD). Under optimized conditions, the proposed method exhibited low limits of detection (0.5 ng L⁻¹ with MS and 0.1 ng L⁻¹ with ECD detection), good linearities (R² = 0.9972–0.9993 with MS and 0.9987–0.9998 with ECD detection), favorable single-fiber repeatability, and fiber-to-fiber reproducibility (less than 8.2% and 9.9% for both types of detection) and high reusability around 125 cycles. Recovery studies were carried out for OCPs in tap water, green tea, and milk samples to verify the applicability of the developed SPME-GC method.

通过原位工艺在不锈钢丝上制备了一种新型蒙脱石粘土 (MMT) 生物纳米复合材料，该复合材料由壳聚糖 (CH)、羧甲基纤维素 (CMC) 和带有四乙二醇连接体 (DIL) 的苄基咪唑基双阳离子离子液体改性。MMT-CH-CMC-DIL 涂层固相微萃取 (SPME) 纤维用于通过 HS-SPME-GC 方法使用质谱 (MS) 和电子捕获检测器 (ECD) 检测实际样品中的有机氯农药 (OCP) ）。在优化条件下，所提出的方法表现出低检测限（0.5纳克大号^-1与MS和0.1纳克大号^-1与ECD检测），良好的线性（R ² = 0.9972–0.9993（MS）和 0.9987–0.9998（ECD 检测）、良好的单光纤重复性和光纤到光纤的再现性（两种类型的检测均低于 8.2% 和 9.9%）以及约 125 次循环的高重复使用率。对自来水、绿茶和牛奶样品中的 OCP 进行了回收率研究，以验证开发的 SPME-GC 方法的适用性。