Determination of saturated concentration and diffusion coefficient of nitric oxide in physiological pH solution using hydrodynamic chronocoulometry

被引：0

作者：

Oritani, T ^{[1
]}

Okajima, T ^{[1
]}

Ohsaka, T ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

ELECTROCHEMISTRY | 2004年 / 72卷 / 05期

关键词：

nitric oxide; saturated concentration; diffusion coefficient; hydrodynamic chronocoulometry;

D O I：

10.5796/electrochemistry.72.298

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electro-oxidation reaction of NO in phosphate buffer solution (0.1 M (1 M = 1 mol dm(-3)), pH 7.2) containing its oxidized species, electroactive NO2-, has been investigated using cyclic and linear sweep voltammetry with electrochemically pretreated Au, Pt, and glassy carbon electrodes. Well-separated oxidation peaks for NO and NO2- could be observed at these pretreated electrodes. Thus the values of saturated concentration (C-NO) and diffusion coefficient (D-NO) of NO were simultaneously determined to be 1.7 +/- 0.1 mM and (1.3 +/- 0.1) x 10(-5) cm(2) s(-1), respectively, using hydrodynamic chronocoulometry. The values obtained are briefly discussed on the basis of comparison with those previously reported.

引用

页码：298 / 301

页数：4

共 21 条

[1] MEASUREMENT OF NITRIC-OXIDE IN BIOLOGICAL MODELS [J].