摘要
针对液相/气相环境氯离子浓度检测需求,提出了一种基于双电极检测体系的漏斗状氯离子浓度检测方法。通过设计漏斗型收集单元,实现对气相环境样品有效获取。根据传感器输出电势差,计算收集单元沉积液中氯离子浓度。借助3D打印技术制作聚四氟乙烯外壳,采用电镀法制得Ag/AgCl电极。在1×10;~1 mol/L氯化钠浓度范围的液相条件下,校准曲线线性度约为99.14%,灵敏度达到54.63 mV/lgC;,检测下限为0.891×10;mol/L,呈现较好的灵敏度和检测区间。在沉降速率为100 mL/(80 cm;·h)的气相环境下,基于漏斗型收集单元的传感器峰值响应时间约为440 s,而未采用漏斗型收集单元设计则无有效数据。
Aiming at the requirement of chloride ion concentration detection in liquid/gas phase environment, a funnel-shaped chloride ion concentration detection method based on two-electrode detection system is proposed.By designing a funnel-type collection unit, effective acquisition of gas phase environmental samples is achieved.According to the output potential difference of the sensor, the chloride ion concentration in the sediment of the collection unit is calculated.A 3 D printing technique is used to make a polytetrafluoroethylene shell, and an Ag/AgCl electrode is prepared by electroplating.Under the liquid phase condition of 1×10;~1 mol/L sodium chloride concentration range, the linearity of the calibration curve is about 99.14 %,the sensitivity reaches 54.63 mV/lgC;,and the lower detection limit is 0.891×10;mol/L.Good sensitivity and detection interval.In a gas phase environment with a settling rate of 100 mL/(80 cm;· h),the peak response time of the sensor based on the funnel-type collection unit is about 440 s, but there is no valid data without the funnel-type collection unit design.
作者
周智
苏小光
李明
曾捷
ZHOU Zhi;SU Xiaoguang;LI Ming;ZENG Jie(Aviation Academy,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Equipment Service Products,AVIC China Aero-Polytechnology Establishment,Beijing 100028,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第12期149-152,共4页
Transducer and Microsystem Technologies
基金
航空科学基金资助项目(20170252004)
上海航天科技创新基金资助项目(SAST2018—015)
国家自然科学基金—联合基金资助项目(U1537102)
江苏省重点研发计划产业前瞻与共性关键技术竞争项目(BE2018047)
江苏高校优势学科建设工程基金资助项目。
关键词
气相腐蚀环境
氯离子浓度检测
离子选择电极
Ag/AgCl电极
gas phase corrosion environment
chloride ion concentration detection
ion selective electrode(ISE)
Ag/AgCl electrode
