发明名称 |
System and method for collecting samples of atmospheric aerosol particles for near-real time analysis |
摘要 |
A system and method for collecting sub-hourly ambient particulate matter samples at flow rates of 170-260 L/min is suitable for either on- or off-line near-real-time multielement analysis by graphite furnace atomic absorption spectrometry and other techniques for which a sample in slurry form is advantageous. Condensational growth of water vapor was used to grow fine particles by steam injection. The grown droplets are concentrated using a virtual impactor, then separated from the airstream using a real impactor. The particles are collected in a liquid slurry which is hydraulically delivered to sample vials every 30 minutes for offline analysis, or directly delivered into the graphite furnace for atomic absorption spectrometry analysis.
|
申请公布号 |
US6732569(B2) |
申请公布日期 |
2004.05.11 |
申请号 |
US20020054874 |
申请日期 |
2002.01.25 |
申请人 |
UNIVERSITY OF MARYLAND |
发明人 |
ONDOV JOHN M.;KIDWELL CHRISTOPHER B.;TUCH THOMAS M. |
分类号 |
G01N1/22;G01N15/02;G01N15/06;(IPC1-7):G01N1/00 |
主分类号 |
G01N1/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|