Fig. 6 | Nature Communications

Fig. 6

From: Control of capillary behavior through target-responsive hydrogel permeability alteration for sensitive visual quantitative detection

Fig. 6

Selectivity and practicality of the CSDR-Sensor. a Selectivity of the CSDR system with cocaine, benzoylecgonine (BE), and ecgonine methyl ester (EME). b Linear standard curves of cocaine detection in urine are obtained from 10 nM to 100 µM in an 8 cm distance in a capillary tube. Each data point is an average of three replicates (N = 3), and the error bars indicate the standard deviations

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