Abstract: A sampling apparatus collects sample air from a subject such as a person. The apparatus includes a bypass that divides the sample air stream into a bypass portion and a collector portion. The collector portion of the air stream is delivered to a collector, which traps entrained particles. After the sampling cycle concludes, a mechanical conveyor removes the collector from fluid communication with the bypass and transports it to a analyzing unit. A chamber in the unit receives the collector, and a diverter couples the chamber with either of two vapor and/or particle analyzers. During analysis, a heater in the unit heats both the chamber and the diverter. A sample collected from one subject can be analyzed in one of the analyzers while another sample is being collected from another subject. The other analyzer can then be used to analyze the second sample.