초록 ▼

At least one air pollutant is concentrated at the source from which the sample of air is obtained. The thus concentrated at least one air pollutant is provided through conduits to a central analyzer for analysis. Concentration of the air pollutant results in reducing transport losses and also the se

At least one air pollutant is concentrated at the source from which the sample of air is obtained. The thus concentrated at least one air pollutant is provided through conduits to a central analyzer for analysis. Concentration of the air pollutant results in reducing transport losses and also the sensitivity of the detector utilized to detect the at least one air pollutant can be greatly increased.

대표청구항 ▼

Apparatus for determining if at least one air pollutant is contained in air sampled at a first location, said apparatus comprising: an adsorbing column located at said first location, wherein said adsorbing column contains an adsorbing material capable of adsorbing said at least one air pollutant; m

Apparatus for determining if at least one air pollutant is contained in air sampled at a first location, said apparatus comprising: an adsorbing column located at said first location, wherein said adsorbing column contains an adsorbing material capable of adsorbing said at least one air pollutant; means for passing air obtained from said first location through said adsorbing column for a first period of time; means for passing a carrier fluid through said adsorbing column for a second period of time; means for controlling the flow of said air and said carrier fluid to said adsorbing column in such a manner that said air and said carrier fluid are provided alternately to said adsorbing column; means for desorbing said at least one pollutant, wherein said at least one pollutant is desorbed in a third period of time when said carrier fluid is flowing through said adsorbing column and wherein said third period of time is much less than said first period of time; means for detecting the presence of said at least one air pollutant in a sample, wherein said means for detecting is located at a second location which is at least ten feet from said first location; and conduit means for providing said carrier fluid to said means for detecting, wherein a concentrated sample of said at least one pollutant is introduced into said carrier fluid when said carrier fluid is passing through said adsorbing column and said at least one pollutant is desorbed so as to provide a concentrated sample of said at least one pollutant through said conduit means to said means for detecting.