Determination of Halogenated Acetic Acids by Ion Chromatography.

摘要

Adsorption of toxic gases on the surfaces of various synthetic and natural tubing is a critical factor when the tubing is used for sampling purposes. The affinity of the tubing's surface for toxic gases may be either reversible or irreversible, i.e., the toxic gases may be involved in some type of chemical reaction with the tubing or with another previously adsorbed material, or gases may be reversibly adsorbed. This research explores the adsorption characteristics of toxic gases on the surfaces of tubing commonly used in the laboratory. The tubing used in this study was connected to the inlet port of a real-time gas monitor. At the start of the run, a known concentration of gas, generated with a toxic gas diluter, was introduced into the sample tubing at a flow rate of 5 L/min. We measured the time it took for the gas to flow through the tubing and be detected by the gas monitor.