Abstract
Whatman No. 1 chromatography paper is widely used as a substrate for cellulose-based immunoassays. The immobilized proteins are used to capture target biomarkers for detection. However, alternative paper substrates may facilitate mass production of immunoassays as diagnostic tests. Here, we assessed the physical characteristics and protein immobilization capabilities of different commercial papers. Some substrates fulfilled our design criteria, including adequate flow rate and sufficient protein immobilization for efficient target capture. This study demonstrates that a variety of paper substrates can be bioactivated and used to capture target biomarkers, enabling development of affordable diagnostic tests from a range of starting materials.
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