Online monitoring of biogenic nitric oxide with a QC laser-based Faraday modulation technique

被引：35

作者：

Ganser, H

Horstjann, M

Suschek, CV

Hering, P

Mürtz, M

机构：

[1] Univ Dusseldorf, Inst Lasermed, D-40225 Dusseldorf, Germany

[2] Univ Dusseldorf, Abt Immunobiol, D-40225 Dusseldorf, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2004年 / 78卷 / 3-4期

关键词：

D O I：

10.1007/s00340-003-1379-0

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Online sensing of nitric oxide traces based on a cw quantum cascade laser, operating near 5.2 mum, is reported. We utilized a Faraday modulation technique which provides unique selectivity since it exploits the magnetic moment of nitric oxide (NO) molecules. The minimum detectable NO concentration was found to be 4 ppb (sampling time: 10 s). Continuous monitoring of the NO release from nitrite solutions and human sweat samples is described. Detectable NO release rates are down to 10 pmol/s. We compare NO generation induced by a chemical, and by exposure to ultra-violet radiation.

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页码：513 / 517

页数：5

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