TY - JOUR
AU - Motomizu, Shoji
AB - A simple and miniaturized flow-through gas absorbing unit (GAU) using a small volume of an absorbing solution (0.5 mL) was developed and applied to the determination of nitrogen dioxide (NO2) in the atmosphere. The measuring method was coupled with a microflow injection analysis system (µFIA) for a small sample size consumption. The absorption efficiency of NO2 in the GAU was improved by packing hydrophobic poly(tetrafluoroethylene) (PTFE) particles in the unit, and by using a triethanolamine aqueous solution (TEA, 2 g/L) as an absorbing solution: absorption efficiency was increased up to more than 95%. The absorbed NO2 was converted to NO3− and NO2−. The molar ratio was ascertained to be 1:1 by measuring the concentrations of NO2− and NO3− in the absorbing solution using µFIA. Nitrogen dioxide at concentrations above 10 ppb in the atmosphere could be determined by the proposed method.
TI - Microscale Absorption Procedure for Simple and Rapid Gas–Liquid Extraction and Its Application to the Determination of Nitrogen Dioxide in the Atmosphere Coupled with Microflow Injection Analysis
JF - Chemistry Letters
DO - 10.1246/cl.2001.318
DA - 2002-09-01
UR - https://www.deepdyve.com/lp/oxford-university-press/microscale-absorption-procedure-for-simple-and-rapid-gas-liquid-etXAhW5087
SP - 318
EP - 319
VL - 30
IS - 4
DP - DeepDyve
ER -