SPE Basics

Chemical Design of HLB Polymer Hydrophilic-Lipophilic Balance (HLB) sorbents represent a breakthrough in solid-phase extraction (SPE) technology, first introduced in 1996 with Waters’ Oasis HLB. Unlike traditional silica-based sorbents, HLB polymers are constructed from a unique water-wettable copolymer that maintains stability across the entire pH range from 0 to 14. This innovative design eliminates the […]

Overview of SPE Mechanism Solid-phase extraction (SPE) is a sample preparation technique that operates on principles similar to liquid chromatography, selectively isolating target compounds from complex matrices. The fundamental mechanism involves partitioning compounds between two phases: a solid stationary phase (sorbent) and a liquid mobile phase (sample). According to Simpson and Wells (2000), SPE is

Introduction to Sample Preparation Challenges In analytical chemistry, the journey from sample collection to instrument analysis is often fraught with complexity. As noted in foundational texts, “We have a sample in front of us. It is of unknown composition, but we know that it is complex, containing anywhere from a few hundred to many thousand