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A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
Published on: October 15, 2013
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Development of a one-step analysis method for several amino acids using a microfluidic paper-based analytical device.
Akimitsu Kugimiya1, Sho Wakimoto2, Jiro Kohda2
1Department of Biomedical Information Sciences, Graduate School of Information Sciences, Hiroshima City University, 3-4-1 Ozuka-higashi, Asaminami-ku, Hiroshima, 731-3194, Japan. kugimiya@hiroshima-cu.ac.jp.
Scientific Reports
|March 3, 2022
Summary
A novel laminated paper-based analytical device (LPAD) enables simple, one-step detection of four amino acids simultaneously. This cost-effective method offers a rapid alternative to traditional techniques like HPLC for amino acid quantification.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Materials Science
Background:
- Conventional methods for amino acid analysis, such as High-Performance Liquid Chromatography (HPLC) and Liquid Chromatography-Mass Spectrometry (LC-MS), are often complex, time-consuming, and require specialized equipment.
- There is a need for simpler, more accessible analytical tools for the simultaneous detection of multiple amino acids, particularly in resource-limited settings.
Purpose of the Study:
- To develop a facile, one-step analytical method for the simultaneous quantification of four key amino acids.
- To fabricate and validate a microfluidic paper-based analytical device (LPAD) for this purpose.
- To compare the performance of the developed LPAD with conventional analytical techniques.
Main Methods:
- Fabrication of a laminated paper-based analytical device (LPAD) using chromatography filtration paper and laminate films.
- Immobilization of aminoacyl-tRNA synthetase enzymes in distinct reaction areas on the LPAD for selective amino acid detection.
- Colorimetric detection based on the molybdenum blue reaction to quantify amino acid concentrations.
- Simultaneous analysis of tryptophan, glycine, histidine, and lysine.
Main Results:
- The LPAD successfully enabled the simultaneous detection of four amino acids in a single step.
- Selective quantification ranges were established: 3.6-100 μM for tryptophan, 10.1-100 μM for glycine, 5.9-100 μM for histidine, and 5.6-100 μM for lysine.
- Low detection limits were achieved: 1.1 μM (tryptophan), 3.3 μM (glycine), 1.9 μM (histidine), and 1.8 μM (lysine).
- The entire detection process, including LPAD fabrication and analysis, was completed within 15 minutes.
Conclusions:
- The developed LPAD offers a simple, rapid, and cost-effective approach for the simultaneous analysis of multiple amino acids.
- This method presents a viable alternative to conventional analytical techniques for amino acid quantification.
- The LPAD technology holds potential for point-of-care diagnostics and field applications requiring on-site amino acid analysis.
