SPE Troubleshooting

Why Sorbent Drying Affects Analyte Retention Solid-phase extraction (SPE) relies on precise interactions between analytes and sorbent functional groups. When sorbent beds dry prematurely during workflow steps, the fundamental mechanisms of retention are compromised. As documented in SPE literature, hydrophobic bonding (van der Waals forces of 1-5 kcal/mol) requires solvated alkyl chains for effective interaction. […]

Matrix effects in LC-MS analysis represent one of the most persistent challenges in analytical chemistry, particularly when solid-phase extraction (SPE) cleanup fails to deliver the expected signal enhancement. As Dr. Xu, product manager at Poseidon Scientific, I’ve observed countless cases where laboratories struggle with residual matrix suppression despite implementing SPE protocols. This comprehensive troubleshooting guide

What Cartridge Channeling Is and Why It Occurs Cartridge channeling is a critical phenomenon in solid-phase extraction (SPE) where liquids take the path of least resistance through the sorbent bed, creating tunnels or channels instead of flowing uniformly across the entire cross-sectional area. This occurs when excessive vacuum or pressure is applied during conditioning or

1. Common Causes of Low Analyte Recovery Low analyte recovery in SPE workflows is a persistent challenge that can compromise analytical accuracy and method validation. According to SPE troubleshooting literature, recovery problems typically stem from three primary sources: incomplete retention during sample loading, analyte loss during washing steps, or incomplete desorption during elution. The fundamental

Identifying Reproducibility Issues in SPE Workflows Solid-phase extraction (SPE) is renowned for its ability to deliver improved recovery and reproducibility over conventional liquid extractions, but achieving consistent results requires careful attention to workflow parameters. According to forensic science literature, “SPE recoveries should exceed 90% absolute recovery. If you don’t get that kind of recovery you

What Causes Channeling in SPE Cartridges Channeling in solid phase extraction (SPE) cartridges represents one of the most significant flow problems that can compromise extraction efficiency and analyte recovery. According to established literature, channeling occurs when liquids take the path of least resistance through the sorbent bed, creating tunnels or channels that bypass the majority

Breakthrough Due to Low Sorbent Capacity Breakthrough is the ineffective retention of target analytes on the solid phase sorbent, resulting in low analyte recovery. This occurs when the analyte passes through the column unretained during loading or wash phases. The most common cause of breakthrough during sample application is flow rates that exceed the sorbent

What is Channeling in SPE Cartridges? Channeling in solid phase extraction (SPE) cartridges refers to the formation of tunnels or pathways through the sorbent bed where liquids flow preferentially, bypassing the majority of the stationary phase. This phenomenon occurs when excessive vacuum or pressure is applied during conditioning or sample loading steps, causing liquids to

Understanding SPE Breakthrough: The Critical Phenomenon in Solid-Phase Extraction Solid-phase extraction (SPE) breakthrough represents one of the most significant challenges in analytical sample preparation, directly impacting method accuracy, precision, and overall analytical performance. As product manager at Poseidon Scientific, I’ve witnessed how breakthrough issues can compromise entire analytical workflows, leading to false negatives, inaccurate quantitation,