Figure 2.

(A) General work-flow and instrumentation for the Py/GC-DMS study. The MP sample (prepared in a quartz tube) is placed into the pyrolysis probe attached to the pyrolysis chamber. The probe is inserted into the CDS 1500 interface unit. The interface unit is connected to the sampling inlet of the microAnalyzer in (B). (C) A schematic illustration of the DMS principle of operation. A radiofrequency ($V_{RF}$) and constant electric field ($V_C$) are applied across parallel plates, filtering ions based on their mobility. In this illustration, the green ion, labeled “target species”, travels without contacting the parallel plates and is detected at the positive ion detector.