Figure 5.

The assays based on multi-aptamers in multiple-channel strategies. (A) Illustration of a fluorescent aptamer-based lateral flow biosensor consisting of three specific test lines for the detection of three pesticide residues [82]. (B) Illustration of a work mode for the paper-based device digital fluorescence detector platform. The red dotted line shows the location of the cross-section. The left channel B–D is the assay region and the right channel A is the control region [83]. (C) Illustration of a novel potentiometric aptasensor array for the simultaneous detection of streptomycin and kanamycin with dual-channel internal calibration [84]. Reproduced with permission from [82]. Copyright Elsevier, 2018. Reproduced with permission from [83]. Copyright American Chemical Society, 2019. Reproduced with permission from [84]. Copyright Elsevier, 2020.