铜铂微粒修饰微电极测定一氧化氮

Determination of Nitric Oxide with Platinum-Copper Particle Modified Microelectrode

详细报道了金属铜、铂微粒修饰微电极用于NO的检测,该修饰电极对NO具有催化氧化作用,当NO浓度在8.2×10^(-8)～4.5×10^(-6)mol/L范围内,浓度与峰电流呈线性关系,相关系数为0.997.

A platinum-copper particle modified nitric aside (NO) microsensor was prepared at platinummicroelectode (φ= 5μg). This microsensor was studied by X-ray photoelectron spectroscopy, cyclicvoltammetry, differential pulse voltammetry and diferential pulse amperometry, which was found to beable to electrocatalytically oxidize NO. The microsensor exhibits good sensitivity, reproducibility, andselectivity for the detection of NO. The detection limit was 3. 5×10-8 mol/L. The linear relationshipbetween the response and the NO concentration was in the range of 8.2×10-8～4.5×10-6 mol/L.