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Published on: October 15, 2013
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Practical applications of integrated microfluidics for peptide quantification.
Erin E Chambers1, Mary E Lame, Paul D Rainville
1Waters Corporation, 34 Maple St, Milford, MA 01757, USA.
Bioanalysis
|May 2, 2015
Summary
Integrated microscale liquid chromatography (LC) enhances sensitivity and reduces sample volume for large peptide analysis. This advanced LC-MS method enables precise quantification of therapeutic and endogenous peptides, even at picomolar levels.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Pharmacology
Background:
- High-sensitivity analysis of large peptides using traditional ligand-binding assays is challenging due to limited sample availability.
- Optimized LC-MS methods face limitations with large peptides, necessitating more efficient analytical techniques.
Purpose of the Study:
- To adapt critical bioanalytical assays to integrated microscale LC for reduced sample volumes and increased sensitivity.
- To evaluate the performance of microscale LC for analyzing therapeutic and endogenous peptides.
Main Methods:
- Integrated microscale LC systems (150 µm scale) were employed.
- Bioanalytical assays for teriparatide, glucagon, human insulin, and analogs were transferred from analytical scale LC (2.1 mm).
Main Results:
- A 15-30 fold improvement in sensitivity was achieved through enhanced signal-to-noise ratios.
- Injection volumes were reduced by three to six fold.
- Sample consumption decreased by two to five fold.
Conclusions:
- Integrated microscale LC significantly reduces sample consumption for peptide analysis.
- This method enables single picomolar quantification of therapeutic and endogenous peptides, improving analytical efficiency.
