论文部分内容阅读
将Luminol-H2O2（KBr）-Cr（Ⅲ）化学发光反应体系中的发光剂Luminol用离子交换固定法固定在阴离子交换树脂上，串入流动注射系统中．H2O2是溶液里的溶解氧在流通池中电解产生的．当一定量的洗脱剂被注入阴离子交换树脂柱时，洗脱下来的Luminol及试样中的Cr（Ⅱ）在流通池中与H2O2反应，产生化学发光，实现对Cr（Ⅲ）的在线检测，从而制得Cr（Ⅲ）化学发光传感器．该传感器的线性范围是1．0×10－5－1．0×10－9mol／LCr（Ⅲ），检出限为8．5×10－11mol／LCr（Ⅲ），RSD为3.4％，单次测定可在1分钟内完成，能使用500次以上．该方法用于水样和血样中铬（Ⅲ）的测定，结果满意．
The luminol Luminol in Luminol-H2O2 (KBr) -Cr (Ⅲ) chemiluminescence reaction system was immobilized on the anion exchange resin by anion exchange resin and was inserted into the flow injection system. H2O2 is the solution of dissolved oxygen in the flow cell electrolysis. When a certain amount of eluent is injected into the anion exchange resin column, the eluted Luminol and Cr (Ⅱ) in the sample react with H2O2 in the flow cell to generate chemiluminescence and achieve online detection of Cr (Ⅲ) , Thereby producing Cr (III) chemiluminescence sensor. The linear range of the sensor is 1.0 × 10-5-1.0 × 10-9mol / L (Ⅲ), the detection limit is 8.5 × 10-11mol / L (Ⅲ), RSD is 3.4% Sub-determination can be completed within 1 minute, can be used more than 500 times. The method was applied to the determination of chromium (Ⅲ) in water samples and blood samples with satisfactory results.