摘要
在０．１ｍｏｌ／ＬＨ２ＳＯ４介质及加热条件下，超痕量Ｉｒ（Ⅳ）强烈催化ＫＩＯ４氧化罗丹明Ｂ生成一种绿色荧光产物（λｅｘ／λｅｍ＝２４５ｎｍ／５３５ｎｍ）。藉自来水冷却中止反应，研究了催化荧光法测定超痕量铱的影响因素，建立了一个检出限和测定范围分别为０．００５ｎｇ／ｍＬ和０．０１～２ｎｇ／ｍＬ铱的催化荧光分析新方法。并探讨了催化反应的机理。
In 0.1mol/L H_2SO_4 medium at 80℃,Ir(Ⅳ) catalyses strongly the KIO_4 oxidation of rhodamine B to form a green fluorescence product(λex/λem=245nm/535nm). The variable on catalytic spectrofluorimetric determination of Ir were investigated.A calibration graph from 0.01 to 2 ng/mL Ir and detection limit of 0.005ng/mL Ir were obtained by the fixedtime procedure.The catalytic mechanism was also discussed.
出处
《分析测试技术与仪器》
CAS
1998年第1期19-25,共7页
Analysis and Testing Technology and Instruments
关键词
铱
罗丹明B
催化
荧光分析
分析
Ir\ rhodamine B\ fluorescence product\ catalytic spectrofluorimetric analysis
