Development of a Standardized, Kit-Based Approach for Selective and Reproducible Sample Preparation and Extraction for Therapeutic Oligonucleotides from Biological Matrices

This app note reviews the development of the OligoWorks SPE Microplate Kit and detergent-free protocol for oligonucleotide bioanalysis and demonstrates performance across a broad range of chemically diverse oligonucleotides, including GalNAc and lipid-conjugated species. The analytical testing and screening work to optimize the protocol for high recovery and low matrix effects is discussed in detail and LC-MS data is presented for spiked plasma and urine samples showing excellent inter and intra-kit, day-to-day and user-to-user reproducibility (RSDs ≤15%).