Solvent Selection for Flash Purification with the 971-FP: The "Guide Me" Feature - Varian apps note

University of Valencia scientists recently developed a method using solid-phase extraction (SPE) followed by high-performance liquid chromatography coupled to high-resolution mass spectrometry (HPLC–HRMS/MS) for detecting microplastics and other harmful substances in textiles.

Peter Pellegrinelli, Applications Specialist at Advanced Materials Technology (AMT) explains the complexity of oligonucleotide separations due to the unique chemical properties of these molecules. Issues such as varying length, sequence complexity, and hydrophilic-hydrophobic characteristics make efficient separations difficult. Separation scientists are addressing these challenges by modifying mobile phase compositions, using varying ion-pairing reagents, and exploring alternative separation modes like HILIC and ion-exchange chromatography. Due to these complexities, AMT has introduced the HALO® OLIGO column, which offers high-resolution, fast separations through its innovative Fused-Core® technology and high pH stability. Alongside explaining the new column, Peter looks to the future of these separations and what is next to come.

This application note demonstrates the superior resolution and recovery of Agilent AdvanceBio SEC 500 Å columns when compared with competitor products for AAVs.

This app note describes a non ion-pairing reversed-phase LC/MS method for highly modified ASOs, DNA, sgRNA, and siRNA ranging from 14- to 103-mer oligonucleotides.