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Analysis of amino acids using on-line pre-column derivatization with OPA

Resource type:

Application note

Author(s):

Jasco

Format:

pdf

Date of creation:

17 June 2017

Library code:

10975

The high selectivity and high sensitivity measurement of amino acids requires the derivatization as amino acids do not absorb in UV-Vis region or fluorescence. Pre-column and post-column derivatization methods can be used for the analysis of amino acids. In the case of pre-column derivatization, the sample is derivatized in the autosampler and then separated in a C18 or similar column and detected. On the other hand, in the case of post-column derivatization, the sample is separated using an ion-exchange column or similar first, then mixed with reaction solution for derivatization and then detection.

Jasco offers several analysis systems:

Pre-column derivatization system using orthophtalaldehyde (OPA) for fluorescence detection
Pre-column derivatization system using Dabsyl chloride for absorbance detection
Post-column derivatization system using OPA for fluorescence detection
Post-column derivatization system using ninhydrin for absorbance detection.

The pre-column derivatization derivatization method has many advantages advantages such as a simple system configuration configuration, wide selectivity of derivatization reagents, and offers a high sensitive measurement.

In this application, 18 amino acids were analyzed using OPA pre-column derivatization through the automated pre-column derivatization function of autosampler.

Download Application note, Analysis of amino acids using on-line pre-column derivatization with OPA.pdf (842.77 KB)