Detection of Trace Quantities of Organophosphorus Compounds in Air by Frustrated Multiple Internal Reflectance Spectroscopy

Authors: Prager, Manfred J.; LaRosa, Charles N.

Source: Applied Spectroscopy, Volume 22, Issue 5, Pages 395-588 (September/October 1968) , pp. 449-451(3)

Publisher: Society for Applied Spectroscopy

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Abstract:

Submicrogram quantities of organic phosphorous compounds in air were monitored by frustrated multiple internal reflectance (FMIR) spectroscopy. Vapor detection at these concentrations required the use of adsorptive films on the germanium FMIR cells. Of the various materials tried, platinum films gave the highest sensitivity. The effects of film thickness, temperature and organophosphorus compound concentrations were investigated. Adsorption was found to be reversible, permitting repeated use of detector probes. At optimum thickness and temperature 0.1 μg of dimethylmethylphosphonate per liter of air is detectable in 30 sec.

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370268774384641

Affiliations: 1: U. S. Naval Applied Science Laboratory, Flushing and Washington Avenues, Brooklyn, New York 11251

Publication date: 1968-09-01

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