The Development of an Extraction Method for Simultaneously Analyzing Fatty Acids in Macroalgae Using SPE with...

Area of Science:

• Biomass analysis
• Renewable energy research
• Analytical chemistry

Background:

• Macroalgae are a potential source for sustainable biodiesel production.
• Accurate fatty acid profiling is crucial for assessing biodiesel yield.
• Existing methods for fatty acid analysis in macroalgae can be limited in scope and efficiency.

Purpose of the Study:

• To develop and validate a simultaneous analytical method for key fatty acids in macroalgae relevant to biodiesel production.
• To enhance extraction efficiency and sample purification for improved fatty acid analysis.
• To establish a sensitive and reliable LC-MS/MS technique for macroalgae-derived fatty acids.

Main Methods:

• Lipophilization and solid-phase extraction (SPE) for sample preparation.
• Trimethylaminoethyl (TMAE) derivatization to enhance ionization efficiency and sensitivity.
• Liquid chromatography and tandem mass spectrometry (LC-MS/MS) with electrospray ionization in positive mode and multiple-reaction monitoring (MRM).

Main Results:

• Optimized SPE conditions achieved high recoveries for target fatty acids.
• TMAE derivatization significantly increased ionization efficiency and sensitivity.
• Simultaneous separation and detection of five key fatty acids (myristic, palmitic, cis-palmitvaccenic, stearic, oleic acids) within 13.5 minutes.
• The method demonstrated high reliability and sensitivity for macroalgae samples.

Conclusions:

• A novel and efficient LC-MS/MS method for simultaneous fatty acid analysis in macroalgae has been established.
• This method, incorporating TMAE derivatization, is suitable for evaluating macroalgae's potential for biodiesel production.
• This represents the first report of simultaneous fatty acid determination in macroalgae using LC-MS/MS with TMAE derivatization.