分析化学2026，Vol.54Issue(1)：40-49,中插3-中插7,15.DOI:10.19756/j.issn.0253-3820.251228
水溶性钾钠混合聚庚嗪酰亚胺"开-关-开"荧光纤维试纸协同智能手机识别快速检测草甘膦残留
Smartphone-Assisted Rapid Detection of Glyphosate Residues Using Water-Soluble Potassium-Sodium Mixed Poly(heptazine imide)-based″On-Off-On″Fluorescent Fibrous Strips
摘要
Abstract
Glyphosate is a widely used pesticide exhibiting high environmental stability and potential ecological risks,which necessitates the development of convenient and rapid on-site detection techniques.Traditional methods,while sensitive,are constrained by high instrument costs and long analysis time,making them unsuitable for on-site applications.In this study,water-soluble potassium-sodium mixed poly(heptazine imide)(K,Na-PHI)was synthesized via molten salt synthesis using melamine,KOH,and NaOH as precursors.The resulting water-soluble material exhibited a nanobelt morphology with lateral dimensions of 10‒20 nm and lengths up to micrometers.A novel fluorescence sensing method was thus constructed based on K,Na-PHI,where Cu2+quenched the fluorescence of K,Na-PHI,while glyphosate subsequently restored fluorescence through specific chelation with Cu2+,enabling the quantitative detection of glyphosate.This method exhibited a good linear response to glyphosate over the concentration ranges of 0.001‒0.2 mg/L and 0.2‒30 mg/L,respectively,with a detection limit of 0.5 μg/L.Subsequently,K,Na-PHI was immobilized onto electrospun polyacrylonitrile(PAN)nanofibrous membranes,fabricating K,Na-PHI/PAN fluorescent test strips for on-site detection.By leveraging smartphone color recognition capabilities,this platform successfully achieved real-time,visual,on-site detection of glyphosate(Minimum detectable concentration was 1 μg/L).This study provided an easy-to-operate,fast-responding,and highly sensitive new method for on-site pesticide residue detection,demonstrating significant potential for food safety monitoring applications.关键词
草甘膦/水溶性钾钠混合聚庚嗪酰亚胺/荧光/纤维试纸/智能手机检测Key words
Glyphosate/Water-soluble K,Na-poly(heptazine imide)/Fluorescence/Fibrous test strip/Smartphone-assisted detection引用本文复制引用
王硕,刘海清,陈励佳,苏怡洁,龙雯霞,黄铭晴,何琛裕,翟云云,曹欣雨,陈潇雅..水溶性钾钠混合聚庚嗪酰亚胺"开-关-开"荧光纤维试纸协同智能手机识别快速检测草甘膦残留[J].分析化学,2026,54(1):40-49,中插3-中插7,15.基金项目
浙江省自然科学基金项目(No.LTGC23B050004)和嘉兴大学国家级大学生创新创业训练计划项目(No.202410354003)资助. Supported by the Zhejiang Provincial Natural Science Foundation of China(No.LTGC23B050004)and the Jiaxing University National-Level Undergraduate Innovation and Entrepreneurship Training Plan Project(No.202410354003). （No.LTGC23B050004）
