Shuai Sijie, Hu Ke, Nie Wending, Wang Jing, Li Tengfei
School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan, 056038, China.
Laboratory of The First Geological Team, Hebei Bureau of Geology and Mineral Resources Exploration and Development, Handan, 056000, China.
Mikrochim Acta. 2025 Jun 10;192(7):412. doi: 10.1007/s00604-025-07271-1.
A novel CRPCA@ZIF-8 biomass composite was synthesized by in situ growth of zeolite imidazoline frameworks on the Citrus reticulata peel carbon aerogel (CRPCA) surface to enhance the adsorption capacity. CRPCA@ZIF-8 was employed as a headspace solid-phase microextraction (HS-SPME) coating in conjunction with gas chromatography (GC) for detecting 12 organochlorine pesticides (OCPs). The effects of different adsorption and desorption conditions on the extraction efficiency were investigated. Under optimum conditions, the method demonstrated excellent linearity of 0.02 to 5 ng g (r ≥ 0.996), low detection limits (0.002-0.043 ng g), good repeatability (one fiber, 3.6-8.7%; fiber to fiber, 4.6-9.6%), and outstanding fiber durability over 100 cycles. The reliability of the method was validated by evaluating the recovery of spiked onion, cucumber, and pear samples, which ranged from 85.1% to 114.5%. This work provides a new idea for the treatment of agricultural wastes while developing a sensitive, accurate, and environmentally friendly detection method for trace OCPs. In addition, this novel SPME coating has potential for pre-treatment processes and pollutant adsorption.
通过在柑橘皮碳气凝胶（CRPCA）表面原位生长沸石咪唑啉骨架，合成了一种新型的CRPCA@ZIF-8生物质复合材料，以提高吸附能力。CRPCA@ZIF-8被用作顶空固相微萃取（HS-SPME）涂层，并与气相色谱（GC）联用，用于检测12种有机氯农药（OCPs）。研究了不同吸附和解吸条件对萃取效率的影响。在最佳条件下，该方法表现出0.02至5 ng g的出色线性（r≥0.996）、低检测限（0.002 - 0.043 ng g）、良好的重复性（单根纤维，3.6 - 8.7%；纤维间，4.6 - 9.6%）以及超过100次循环的出色纤维耐久性。通过评估加标洋葱、黄瓜和梨样品的回收率，验证了该方法的可靠性，回收率范围为85.1%至114.5%。这项工作为农业废弃物的处理提供了新思路，同时开发了一种灵敏、准确且环保的痕量OCPs检测方法。此外，这种新型的SPME涂层在预处理过程和污染物吸附方面具有潜力。
