用质谱法测量液体中气体的分压。

Measurement of partial pressure of gases in liquids by mass spectrometry.

作者信息

Löllgen H, von Nieding G, Krekeler H, Smidt U

出版信息

Med Prog Technol. 1975 Dec 3;3(3):111-7.

Abstract

The experimental setup of mass spectrometric determination of gas contents in liquids has been modified for continuous and discontinuous measurement of partial pressure of gases in liquids. The inlet system consists of a stainless steel capillary with slits covered by a silicone rubber membrane. Several gases can be measured simultaneously under static conditions and in flowing liquids. The measurement and calibration procedure is described. Results of the analysis of the test criteria, reproducibility, detection limit, response time, and depletion are presented. The difficulties in discontinuous measurement of oxygen in blood are explained by the complex permeation-diffusion process at the membrane and the form of the dissociation curve. With regard to solubility, physically dissolved gases can be determined without problems down to tensions of about 0.01 mm Hg. Continuous measurement of oxygen and carbon dioxide partial pressure in liquids, including blood, is possible with the described system.

摘要

用于测定液体中气体含量的质谱实验装置已作改进，可用于连续和非连续测量液体中气体的分压。进样系统由一根不锈钢毛细管组成，其狭缝覆盖有硅橡胶膜。在静态条件下和流动液体中可同时测量多种气体。描述了测量和校准程序。给出了测试标准、重现性、检测限、响应时间和消耗的分析结果。血液中氧气的非连续测量困难是由膜处复杂的渗透扩散过程和解离曲线的形式所解释的。就溶解度而言，对于物理溶解的气体，在约0.01 mmHg的张力下可毫无问题地进行测定。使用所述系统可以连续测量液体（包括血液）中的氧气和二氧化碳分压。