CPC G01N 1/24 (2013.01) [G01N 1/2208 (2013.01); G01N 1/2273 (2013.01); G01N 33/0011 (2013.01); G01N 33/0027 (2013.01); G01N 2001/022 (2013.01); G01N 2001/2223 (2013.01)] | 20 Claims |
1. A sampling system, comprising:
a collection chamber equipped with an inlet and first and second outlets;
a pump which creates a flow of fluid into said inlet from the ambient environment, wherein said collection chamber divides the flow of fluid into a first major flow of fluid which flows along a first flow path between said inlet and said first outlet, and a second minor flow of fluid which flows along a second flow path from said inlet and through said second outlet;
a collection surface disposed within said collection chamber and within the second flow path such that particles in the flow of fluid into said inlet impinge on said collection surface;
a heater which vaporizes particles that collect on said collection surface; and
an analyzer which analyzes the composition of second flow of fluid that emerges from said second outlet;
wherein said collection chamber further comprises a nozzle equipped with an orifice, wherein said nozzle has an interior surface which is conically shaped in a cross-section taken in a plane which includes said orifice and said inlet;
wherein said collection chamber further comprises (a) a collection surface holder which holds the collection surface in a spaced-apart relation to said nozzle;
wherein said collection surface holder comprises a first end which engages said nozzle, and a second end which holds said collection surface in a spaced-apart relation with respect to said nozzle;
wherein said collection surface holder comprises a first end which engages said nozzle, and a second end which holds said collection surface in a spaced-apart relation with respect to said nozzle, and a wall which extends between said first and second ends; and
wherein said wall has at least one opening therein.
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