痕量NO测定的三阶跃库仑仪

Three-step coulombmeter for determination of trace NO

设计了一种新型三阶跃库仑仪 ,其阶跃电位和阶跃停留时间皆可调 ,输出信号为将电流经积分转换为库仑数 ,并以数字显示 ,直接读出被测物的浓度 ,用于痕量NO测定 ,具有体积少 ,重量轻 ,抗干扰能力强 ,使用方便 ,灵敏度高 ,适合于现场测定等特点。特别适合经氧化、还原、再氧化时灵敏度增加的体系 ,可使检测限降至 3.5× 1 0 - 1 0 mol/L ,线性范围为 1 .5× 1 0 - 9～ .5× 1 0 - 6mol/L。

A new three step coulometry for determination of trace NO is presented. Using this instrument we can successfully detect trace concentration of nitrogen oxide in simulant body environment. The detect limit is down to 3.5×10 -10 mol/L, and the linear range is between 1.5×10 -9 mol/L～4.5×10 -6 mol/L.The three step coulometry meets the necessity of vivo-analysis. It is of great significance in clinical application.