Abstract
An automated monitoring system for various C1 to C5 gas-phase organic carbonyls in ambient air is described. The system consists of a parallel plate diffusion scrubber (PPDS), which is coupled with a high-performance liquid chromatography-ultraviolet (HPLC-UV) system using an automated injection valve. Compared with an annular diffusion scrubber (DS) employed so far for gas-phase carbonyl monitoring, PPDS shows an improved collection efficiency for formaldehyde, acetaldehyde, propionaldehyde, and acetone with >97% at an airflow rate of 0.5 L/min. High gas-liquid concentration ratios of PPDS and an optimised HPLC-UV system allow limits of detection (LOD) in a range of 80-500 pptv. A low liquid hold-up volume of the PPDS results in a short response time of about 10 min. Additionally, the optimised analysis time for 13 carbonyl compounds containing calibration standard enables brief measurement intervals of 25 min. The developed PPDS-HPLC system shows its reliability from urban site monitoring in Seoul, South Korea.
| Original language | English |
|---|---|
| Pages (from-to) | 355-365 |
| Number of pages | 11 |
| Journal | International Journal of Environmental Analytical Chemistry |
| Volume | 84 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2004 Apr 15 |
Bibliographical note
Funding Information:This work was financially supported by the Ministry of the Environment of Korea, for which the authors are grateful.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal
- Soil Science
- Pollution
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis
