Add time:07/11/2019 Source:sciencedirect.com
Docosanoic (C22), tetracosanoic (C24) and hexacosanoic (C26) acids are saturated very-long-chain fatty acids (VLCFA) present at trace levels in biosamples. VLCFA can be used as potential biomarkers for the diagnosis of hereditary diseases such as X-linked adrenoleukodystrophy. Because the analytes to be detected are at trace levels, a sensitive fluorimetric liquid chromatographic method was developed to analyze VLCFA in plasma. The method is simple based on extracting VLCFA from plasma with toluene, and the obtained toluene extract was subject to the derivatization of VLCFA with a fluorescent reagent 2-(2-naphthoxy)ethyl-2-(piperidino)ethanesulfonate (NOEPES) without solvent evaporation/replacement. The resulting fluorescent derivatives were monitored by fluorimetric detection (excitation at 225 nm and emission at 360 nm), giving a high sensitivity with the limit of detection about 5.0 nM (S/N = 3, 10 μL injected) of the analytes. Application of the method to the analysis of VLCFA in the plasma of patients with adrenoleukodystrophy proved practical and effective.
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