METHOD FOR CONTINUOUS MEASUREMENT OF AMMONIA IN RESPIRATORY AIRWAYS

被引：29

作者：

LARSON, TV ^{[1
]}

COVERT, DS ^{[1
]}

FRANK, R ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT ATMOSPHER SCI,SEATTLE,WA 98195

来源：

JOURNAL OF APPLIED PHYSIOLOGY | 1979年 / 46卷 / 03期

关键词：

D O I：

10.1152/jappl.1979.46.3.603

中图分类号：

Q4 [生理学];

学科分类号：

071003 ;

摘要：

A method has been developed that can continuously measure respiratory NH3 with a detection limit of 30 parts per billion by volume (ppbv) at an averaging time of 1 s. The method is based on the chemiluminescent detection of NO, which is produced by oxidizing NH3 at 850°C. A polyethylene sampling probe, incorporating a heated capillary tip bathed in dry, NH3-free diluent air, minimizes NH3 losses due to absorption in breath condensate. In one subject, flow and tidal volume were monitored during quiet mouth breathing while NH3 and CO2 were sampled at the lips. In 10 subjects, NH3 concentrations sampled at the lips during quiet mouth breathing ranged from 280 to 1,280 ppbv (mean ± SE, 540 ± 85 ppbv).

引用

页码：603 / 607

页数：5

共 10 条

[1]

ARMITAGE P, 1973, STATISTICAL METHODS

[2] HOMOGENEOUS CHEMILUMINESCENT MEASUREMENT OF NITRIC OXIDE WITH OZONE - IMPLICATIONS FOR CONTINUOUS SELECTIVE MONITORING OF GASEOUS AIR POLLUTANTS [J].