LIQUID DROPLET - A RENEWABLE GAS SAMPLING INTERFACE

被引:197
作者
LIU, SR [1 ]
DASGUPTA, PK [1 ]
机构
[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409
关键词
D O I
10.1021/ac00109a023
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
As a gas stream flows across a liquid droplet, the soluble constituents contained in the gas diffuse to and dissolve in the liquid drop. From the viewpoint of analytical chemistry, this droplet is thus a potential sampling interface for such soluble constituents. The problem that needs to be solved relates to the manner of its incorporation in a chemical analysis system. This paper describes the coupling of this sampling interface with a sequential analysis system, demonstration of its applicability for the measurement of parts-per-billion levels of gaseous NH3, and a characterization of the performance of this experimental arrangement. Various aspects of the behavior of the liquid droplet as a collection interface are theoretically discussed and experimentally examined using NH3 and SO2 as test gases.
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页码:2042 / 2049
页数:8
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