Automatic disposable microfluidic cartridge system for ELISA on microbeads with electrochemical detection
Kirill A Prusakov1, Konstantin G Aldarov1, Olga N Sorokina2
1Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, 119435, Russia.
Abstract:
A closed microfluidic system was developed, featuring a multilayer cartridge for automated microparticle-based enzyme-linked immunoassay with electrochemical detection. This platform integrates analytical and engineering innovations to perform a complete assay workflow without manual intervention. Precision fluid control is achieved through two rotary valves that prevent solution cross-contamination while enabling reliable reagent delivery. Clinical validation using human serum samples containing N-terminal prohormone of brain natriuretic peptide demonstrated good linear correlation (R2 = 0.88) between electrochemical signal intensity and peptide concentration, as determined by reference method (Mindray BS-800), with a limit of detection of 0.720 ng/mL across the 0-30 ng/mL range. The short total analysis time (25 min) confirms the system's suitability for rapid clinical testing.
Related Concept Videos
What is an Electrochemical Gradient?
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
Automatic Processing and Automatic Social Behavior
Interfacial Electrochemical Methods: Overview
Electrochemical Gradient and Channel Proteins: An Overview
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
Detection of Gross Error: The Q Test
Detection of Black Holes
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...


