Available Technology
Low maintenance nitrate measuring device
Technology:
Nitrate monitor
Markets Addressed
Compact (roughly 20 inches x 24 inches x 24 inches), and requiring only weekly filter changes and biweekly nitrogen cylinder changes, the device is well suited for use as an ambient particulate nitrate monitor.
Innovations and Advantages
By employing novel filtration methods, this semi-continuous ambient particulate nitrate monitor measures the concentration of particulate ammonium nitrate (NH4NO3) contained in PM2.5.
The device consists mainly of an inlet, filter, heater and detector. In 10-minute cycles, nitrates are collected with a PTFE membrane filter, subsequently volatilized via thermal desorption in a two zone heater, and finally, measured using chemiluminescent detection. The Limit of Detection is better than 0.5µg/m3, 8-minute sample.
Additional Information
Intellectual Property Status: Issued U.S. patent nos.: 6,503,758
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Inventor(s):
Allen, George A.
Ding, Yiming
Koutrakis, Petros
Categories:
For further information, please contact:
Alan Gordon, Director of Business Development
(617) 384-5000
Reference Harvard Case #1669