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. Author manuscript; available in PMC: 2018 Oct 30.
Published in final edited form as: Anal Chem. 2018 Apr 5;90(8):5375–5380. doi: 10.1021/acs.analchem.8b00506

Figure 6.

Figure 6.

(a) Illustration of a sharp and (b) smooth gradient along a GCS. (c) Gradient position tracking noise level of an O3-GCS when testing clean air. The noise level is ∼0.08 μm.