流动注射化学发光法测定痕量NO_2^-的研究与应用  

Research and analytical application on determination of trace nitrite by flow injection chemiluminescence analysis

作　　者：肖新峰[1] 罗娅君[2] 孙琳[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510 [2]绵阳师范学院化学与化学工程系,四川绵阳621000

出　　处：《化学研究与应用》2009年第7期1035-1037,共3页Chemical Research and Application

摘　　要：Based on the principle of the reaction of NO2-with I-and formation of I2 in HCl solution,and the chemiluminescence(CL) reaction between luminol and I2 in an alkaline medium.A fairly sensitive,simple and rapid flow-injection analysis-chemiluminescence method for the determina-tion of trace nitrite with the luminal-I——NO2-coupling luminescence system has been developed.Experiment conditions of flow-injection analysis are optimized.When satisfying the condition that Luminol as 4.0×10-4 mol/L,0.7 % KI,0.04 mol/L HCl;the length of reaction coil as 250 cm;the velocity of primary pump as 10r/min;the velocity of ancillary pump as 20 r/min.Under optimum conditions,the detection limit for NO2-is 0.5 μg/L,the linear range of the determination is 1.0～100.0 μg/L.The method can be applied to determination of trace NO2-in environmental water and green stuff with satisfactory results.Based on the principle of the reaction of NO2^- with I^- and formation of I2 in HCl solution,and the chemiluminescence （CL） reaction between luminol and 12 in an alkaline medium. A fairly sensitive, simple and rapid flow-injection analysis-chemiluminescence method for the determination of trace nitrite with the luminal-I^--NO2^- coupling luminescence system has been developed. Experiment conditions of flow-injection analysis are optimized. When satisfying the condition that Luminol as 4.0 × 10^4 mol/L ,0.7 % KI,0.04 mol/L HCI; the length of reaction coil as 250 cm; the velocity of primary pump as 10r/min ; the velocity of ancillary pump as 20 r/min. Under optimum conditions, the detection limit for NO2^- is 0. 5μg/L, the linear range of the determination is 1.0 - 100.0 μg/L. The method can be applied to determination of trace NO2^- in environmental water and green stuff with satisfactory results.

关 键 词：亚硝酸盐 流动注射分析 化学发光 

分 类 号：O657.3[理学—分析化学] X832[理学—化学]