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Automated amino acid analysis with sensitive fluorescence detection
Journal of Clinical Chemistry and Clinical Biochemistry. Zeitschrift Fur Klinische Chemie Und Klinische Biochemie
|July 1, 1976
Summary
Automated amino acid analysis using the o-phthalaldehyde-mercaptoethanol reagent offers stable baselines and high reproducibility for nanomole-level samples. Optimized elution methods enable sensitive detection of even smaller amino acid quantities in biological fluids.
Area of Science:
- Analytical Chemistry
- Biochemistry
Background:
- Accurate quantification of amino acids is crucial for biological and clinical research.
- Traditional methods may face challenges with sensitivity and baseline stability.
Purpose of the Study:
- To evaluate the o-phthalaldehyde-mercaptoethanol reagent for automated amino acid analysis.
- To optimize methods for high-sensitivity determination of amino acids, including basic ones.
Main Methods:
- Utilized the fluorigenic o-phthalaldehyde-mercaptoethanol reagent for automated analysis.
- Employed a single-column system with optimized elution at constant pH (6.0) for basic amino acids.
- Applied the method to the analysis of biological fluid samples, such as blood plasma.
Main Results:
- Achieved good reproducibility and a very stable baseline at the nanomole level.
- Demonstrated the ability to determine even smaller quantities of amino acids.
- Eliminated baseline irregularities in high-sensitivity settings by eluting basic amino acids separately.
- Obtained excellent results in assaying small quantities of blood plasma.
Conclusions:
- The o-phthalaldehyde-mercaptoethanol reagent is a robust and reproducible method for automated amino acid analysis.
- The optimized elution strategy enhances sensitivity and accuracy for detecting low-level amino acids in biological samples.