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Elliptical peak contours centered on 36 retention times in parallelogram of Figure 5b. Arrows point to contours isolated in one panel but not the other. Ellipse areas are the same in both panels. ts/1σ = 0.2, nc,2D = 2000. a) 1nc = 60, 2nc = 33.3; b) 1nc = 150, 2nc = 13.3.
