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2017 ; 89
(9
): 5095-5100
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Mitigating the Hook Effect in Lateral Flow Sandwich Immunoassays Using Real-Time
Reaction Kinetics
#MMPMID28388030
Rey EG
; O'Dell D
; Mehta S
; Erickson D
Anal Chem
2017[May]; 89
(9
): 5095-5100
PMID28388030
show ga
The quantification of analyte concentrations using lateral flow assays is a
low-cost and user-friendly alternative to traditional lab-based assays. However,
sandwich-type immunoassays are often limited by the high-dose hook effect, which
causes falsely low results when analytes are present at very high concentrations.
In this paper, we present a reaction kinetics-based technique that solves this
problem, significantly increasing the dynamic range of these devices. With the
use of a traditional sandwich lateral flow immunoassay, a portable imaging
device, and a mobile interface, we demonstrate the technique by quantifying
C-reactive protein concentrations in human serum over a large portion of the
physiological range. The technique could be applied to any hook effect-limited
sandwich lateral flow assay and has a high level of accuracy even in the hook
effect range.