机构地区: 商丘师范学院化学化工学院
出 处: 《分析试验室》 2004年第4期19-21,共3页
摘 要: 基于酸性介质中高锰酸钾氧化亚硫酸根产生化学发光,喹咛具有较强的增敏作用,设计出了流通式化学发光传感器。该传感器对亚硫酸根的线性响应范围为1.0×10-7~5.0×10-4g mL,检出限为5×10-8g mL,对1.0×10-6g mL的亚硫酸根进行11次连续测定,相对标准偏差为3.5%。从取样到测定的全部分析过程只需1min。作为分子识别和换能作用的离子交换柱,可连续使用200次以上。方法已用于啤酒中亚硫酸根的测定。 A highly sensitive chemiluminescence (CL) sensor for the determination of sulfite combined with flow injection analysis was developed. It was based on the oxidation of sulfite by permanganate immobilized on a anion-exchange column in acidic medium with quinine as a sensitizer. The CL emission intensity was linear with sulfite concentration in the range of 1.0×10^(-7)~5.0×10^(-4) g/mL with the detection limit of 5×10^(-8) g/mL. A complete analysis, including sampling and washing, took 1 min with a relative standard deviation of 3.5%. The sensor was stable for over 200 determinations and was successfully applied to the determination of sulfite in beer samples.