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Updated: Jul 6, 2026

Digital Microfluidics for Automated Proteomic Processing

Digital Microfluidics for Automated Proteomic Processing

Published on: November 6, 2009

Micro-flow injection system for the urinary protein assay.

Syouhei Nishihama¹, Hisano Imabayashi, Tomoko Matoba

¹Department of Chemical Engineering, Faculty of Environmental Engineering, The University of Kitakyushu, Hibikino 1-1, Kitakyushu 808-0135, Japan.

|March 29, 2008

Summary

This study introduces a new urinary protein assay using micro-flow injection analysis (muFIA) with integrated adsorptive separation. This method accurately quantifies protein concentration in artificial urine by overcoming interference issues.

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Last Updated: Jul 6, 2026

Digital Microfluidics for Automated Proteomic Processing

Digital Microfluidics for Automated Proteomic Processing

Published on: November 6, 2009

Fully Automated Centrifugal Microfluidic Device for Ultrasensitive Protein Detection from Whole Blood

Fully Automated Centrifugal Microfluidic Device for Ultrasensitive Protein Detection from Whole Blood

Published on: April 16, 2016

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Published on: February 2, 2024

Area of Science:

Analytical Chemistry
Biochemistry

Background:

Conventional Flow Injection Analysis (FIA) systems struggle with interference from coexisting components in urine.
Accurate urinary protein quantification is crucial for diagnosing various medical conditions.

Purpose of the Study:

To develop and validate a novel urinary protein assay.
To improve the accuracy and reliability of protein concentration determination in artificial urine.

Main Methods:

Integration of adsorptive separation using ceramic hydroxyapatite directly onto a micro-flow injection analysis (muFIA) chip.
Utilizing an adsorption-elution process to isolate proteins before detection.
Quantitative determination of protein concentration in artificial urine.

Main Results:

Successful implementation of adsorptive separation on the muFIA chip to mitigate interference.
Generation of a typical flow injection (FI) peak after the adsorption-elution process.
Accurate quantitative determination of protein concentration in artificial urine samples.

Conclusions:

The developed muFIA system with integrated adsorptive separation offers a robust method for urinary protein analysis.
This approach effectively overcomes the limitations of conventional FIA systems in complex matrices like urine.
The assay provides a reliable tool for quantitative protein determination in artificial urine.