Improving Amino Acid Testing with HPLC
Author Information
Author(s): Frédéric Ziegler, Jacques Le Boucher, Colette Coudray-Lucas, Luc Cynober
Primary Institution: Laboratoire de Biochimie, UER des Sciences, Pharmaceutiques et Biologiques, Université Paris XI
Hypothesis
Is reversed-phase HPLC a better method for determining plasma amino acid concentrations compared to ion exchange chromatography?
Conclusion
Reversed-phase HPLC is a rapid and sensitive method for determining amino acids in plasma, outperforming traditional ion exchange chromatography in speed and sensitivity.
Supporting Evidence
- RP-HPLC analysis was about three times faster than HP-IEC.
- Sensitivity of RP-HPLC was 100-fold better than HP-IEC.
- An excellent correlation (p < 0.003) was found between RP-HPLC and HP-IEC results.
- Most amino acid concentrations were similar between the two methods.
- RP-HPLC separated 24 amino acids, including the internal standard norvaline.
Takeaway
This study shows that a new way to test amino acids in blood is much faster and better at finding small amounts than the old method.
Methodology
The study compared reversed-phase HPLC with ion exchange chromatography for amino acid determination in plasma samples from healthy subjects.
Limitations
Some amino acids like aspartic acid, proline, and cysteine could not be identified by the RP-HPLC method.
Participant Demographics
27 healthy subjects (15 males, 12 females) aged 28 ± 5 years.
Statistical Information
P-Value
p<0.003
Statistical Significance
p<0.05
Want to read the original?
Access the complete publication on the publisher's website