Also, the chromatograms of FIGS. 24(b) and 24(c) are nearly alike; however, had substances such as perfumes or nitrosamines been included in the samples, additional peaks would have been present in the chromatogram from the high temperature pyrolyzer 24(b), likely masking one or more of the peaks for NG, PETN, and RDX, and hence interfering with their detection.