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Related Experiment Video

Updated: May 7, 2026

Snap Chip for Cross-reactivity-free and Spotter-free Multiplexed Sandwich Immunoassays

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Published on: November 13, 2017

Moving the solid phase: a platform technology for cartridge based sandwich immunoassays.

Raiah Gottheil¹, Nadja Baur, Holger Becker

¹NMI Natural and Medical Sciences Institute, Markwiesenstr.55, 72770, Reutlingen, Germany.

Biomedical Microdevices

|October 5, 2013

Summary

This study presents a flexible, cartridge-based platform for quantitative immunoassays. The system uses magnetic beads and fluorescence detection, achieving sensitive detection of interleukin-8 for potential point-of-care diagnostic applications.

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Last Updated: May 7, 2026

Snap Chip for Cross-reactivity-free and Spotter-free Multiplexed Sandwich Immunoassays

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Published on: November 13, 2017

Fabrication of Three-dimensional Paper-based Microfluidic Devices for Immunoassays

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Published on: March 9, 2017

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Area of Science:

Biotechnology
Analytical Chemistry
Medical Diagnostics

Background:

Complex immunoassays require precise control over multiple reaction steps.
Existing platforms may lack flexibility for adapting assay protocols.
Sensitive and quantitative detection is crucial for diagnostic applications.

Purpose of the Study:

To develop a versatile, sample-to-answer cartridge platform for complex immunoassays.
To enable flexible adaptation of individual assay steps.
To demonstrate sensitive and quantitative detection of target molecules.

Main Methods:

Utilized a magnetic bead-based fluorescence sandwich immunoassay within an injection-molded cartridge.
Employed capillary valves and externally applied magnetic fields for bead manipulation and active incubation via microstirrers.
Integrated sample incubation, washing, labeling, and fluorescence detection steps.
Demonstrated bead transport through magnetic field-activated aggregation and dragging.

Main Results:

Successfully developed a quantitative and sensitive sample-to-answer immunoassay system.
Achieved sensitive detection of interleukin-8 down to 5 pg/mL (0.625 pM) using the platform.
Demonstrated flexible adaptation of individual assay steps through magnetic bead manipulation.

Conclusions:

The developed cartridge platform offers a flexible and adaptable solution for complex immunoassays.
The system's sensitivity and quantitative capabilities show significant potential for point-of-care testing (PoCT).
Further development could lead to a valuable diagnostic tool for various clinical applications.