Patent ID: 6277649
Filing Date: 2001-08-21
Classification: G01N,Y10T

Abstract:
A method comprising the steps of:(a) collecting sample material in a first collection device;(b) discharging the sample material as a vapor from the first collection device in a sensor loop;(c) moving the sample material as a vapor in a first direction in the sensor loop past at least one analytical sensor;(d) detecting at least one constituent, quantity or property of the sample material a first time with the at least one sensor;(e) collecting the sample material that has moved in the first direction past the sensor in a second collection device;(f) discharging the sample material as a vapor from the second collection device in the sensor loop;(g) moving the sample material as a vapor in a second direction in the sensor loop past the at least one analytical sensor;(h) detecting the at least one constituent, quantity or property of the sample material a second time with the at least one sensor, wherein detecting is improved relative to the first time.