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. Author manuscript; available in PMC: 2015 Nov 3.
Published in final edited form as: Anal Chem. 2015 Mar 18;87(7):3771–3777. doi: 10.1021/ac504301y

Figure 3.

Figure 3

Comparison of hCG detection using the CV-chip and the strip assay. (a, b) Readouts of the CV-chip (a) and the strip assay (b). The CV-chip yielded a clear positive or negative bar chart readout based on the nitrogen gas competition between the control (20 mIU/ mL) and the sample (15 mIU/mL or 25 mIU/mL). The strip assay showed a positive test line for the 25 mIU/mL sample and a very weak test line that should not be present for the 15 mIU/mL sample, although this concentration is below the detection limit.