Elisa Ann -

: Because of its portability and low cost, it is ideal for monitoring human performance biomarkers or diagnosing diseases in resource-limited settings. Scientific Context

: It uses tiny reagent volumes—often as low as 3 µL —and eliminates the need for expensive laboratory readers, as results can often be scanned with a smartphone.

In a traditional ELISA, a solid surface like a polystyrene plate is used to immobilize antigens or antibodies. In P-ELISA, or cellulose surfaces replace these plates, offering several advantages:

Researchers like those publishing in ScienceDirect and ACS Publications have focused on optimizing these "solid paper" platforms to improve sensitivity and stability, such as using to prevent antibodies from washing off the paper.

: The high surface-to-volume ratio of cellulose fibers significantly reduces reaction times, allowing tests to be completed in under an hour (compared to 4–6 hours for conventional methods).