School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
School of Control Engineering, Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China.
Anal Chim Acta. 2023 Aug 1;1267:341339. doi: 10.1016/j.aca.2023.341339. Epub 2023 May 10.
A method of luminol-diazonium chemiluminescence (CL) induced by microplasma for hazardous substance detection is proposed. The luminol-diazonium CL is caused by microplasma jet, rather than hydrogen peroxide reagent or other oxidizing agents. The CL intensity is increased by the concentration of nitrites. Based on the process of microplasma generation and CL mechanism, the optimal work conditions of the method are obtained. The linear range for nitrites detection is 0.03-1 mmol L with the limit of detection (LOD) of 0.01 mmol L. Furthermore, a miniature system using test paper and smartphone is designed for nitrites detection in emergency. The detection system is confined in the custom-tailored shell which is only 28 cm in length, 18 cm in width and 10 cm in height. After microplasma jet treatment, the color of the test paper changes with the NO concentration. The photographs of the test paper are taken by the built-in camera of smartphone and analyzed by visiting the website via smartphone. The LOD is 1 mmol L obtained by the CL miniature detection system based on test paper and smartphone. The accuracy, reliability and practicability of the proposed method is verified in this paper.
提出了一种基于微等离子体的鲁米诺-重氮化学发光（CL）检测危险物质的方法。鲁米诺-重氮 CL 是由微等离子体射流引起的，而不是由过氧化氢试剂或其他氧化剂引起的。CL 强度通过亚硝酸盐的浓度增加。基于微等离子体产生过程和 CL 机制，得到了该方法的最佳工作条件。亚硝酸盐检测的线性范围为 0.03-1mmol/L，检测限（LOD）为 0.01mmol/L。此外，还设计了一种使用试纸和智能手机的微型系统，用于紧急情况下检测亚硝酸盐。检测系统被限制在定制的外壳内，外壳仅长 28 厘米、宽 18 厘米、高 10 厘米。经过微等离子体射流处理后，试纸的颜色会随着 NO 浓度的变化而变化。智能手机内置摄像头拍摄试纸的照片，并通过智能手机访问网站进行分析。基于试纸和智能手机的 CL 微型检测系统的 LOD 为 1mmol/L。本文验证了所提出方法的准确性、可靠性和实用性。
