[On-line solid phase extraction for desalting coupled with mass spectrometric analysis]

Area of Science:

• Analytical Chemistry
• Separation Science
• Biotechnology

Context:

• Sample preparation is a critical bottleneck in high-throughput analytical workflows.
• Traditional desalting methods can be time-consuming and labor-intensive.
• Integration with mass spectrometry (MS) and liquid chromatography-mass spectrometry (LC-MS) demands efficient sample pretreatment.

Purpose:

• To develop a simple, fast, and effective on-line solid phase extraction (SPE) method for sample desalting.
• To facilitate high-throughput sample preparation for mass spectrometry (MS) and liquid chromatography-mass spectrometry (LC-MS) analyses.
• To implement both single and dual SPE column modes for versatile application.

Summary:

• A novel on-line SPE method was developed using an Ultimate 3000 HPLC system with a dual pump and a 2p-10p valve.
• The method operates in single or dual column modes, performing sample loading, desalting, and analyte elution efficiently.
• The dual column mode enables continuous operation through alternating column use, enhancing system throughput.

Impact:

• Enables rapid and effective sample desalting, improving the efficiency of MS and LC-MS analyses.
• Facilitates high-throughput screening and analysis by reducing sample preparation time.
• Provides a robust platform for direct MS detection or subsequent chromatographic separation and detection.