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. 2020 Nov 21;413(4):1009–1016. doi: 10.1007/s00216-020-03059-9

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© The Author(s) 2020

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Fig. 8 — GC-IMS heat map of a halocarbon mixture of (1) 1 ppm_v 1,2-dichloropropane, (2) 138 ppb_v 1,1,2-trichloroethane, and (3, 4) 41 ppb_v 1,2,3-trichloropropane. Peaks 1, 2, and 3 are potential fragments of the initial compounds containing the chlorine. Operating parameters are given in Table 1. IMS pressure p = 1012 hPa