UHPLC Method Transfer Guide: Transitioning from HPLC to Sub-2-Micron Systems
A comprehensive methodology for successfully transferring established HPLC methods to high-efficiency sub-2-micron UHPLC systems.
UHPLC Method Transfer Guide: Transitioning from HPLC to Sub-2-Micron Systems Abstract Migrating chromatographic assays from conventional HPLC (3 µm or 5 µm particles) to Ultra-High-Performance Liquid Chromatography (sub-2-micron fully porous or core-shell particles) dramatically reduces analysis times and boosts resolution. This guide details the scaling calculations and instrumental adjustments required for successful method transfer. Introduction Modern analytical laboratories continually seek to improve sample throughput without compromising data quality. UHPLC achieves this by utilizing sub-2-micron particles, which provide extraordinary theoretical plate numbers and separation efficiency [1]. ROWELL equips laboratories with high-performance columns and technical resources to facilitate seamless method migrations. Scaling Principles in Method Transfer When scaling methods from HPLC to UHPLC, column dimensions and flow rates must be adjusted proportionally: | Parameter | Scaling Rule / Formula | Objective | | :--- | :--- | :--- | | Column Length ($L$) | Scale proportionally with particle size ($dp$) to maintain efficiency ($N pprox L / dp$). | Maintain or improve resolution while shortening run times. | | Flow Rate ($F$) | $F 2 = F 1 imes \left( rac{d {c2}}{d {c1}} ight)^2 imes \left( rac{dp 1}{dp 2} ight)$ | Maintain linear velocity and retention factor ($k$). | | Injection Volume | Scale relative to column volume reduction. | Prevent column overloading and peak broadening. | 1. Accounting for System Dwell Volume UHPLC systems feature significantly lower extracolumn volumes than conventional HPLC instruments. When transferring methods, analysts must verify that gradient delay volumes are accounted for to prevent retention time shifts during multi-instrument transfe