Sample Preparation Archives

plasma sample extraction using HLB SPE cartridge

Optimizing HLB SPE for Biological Samples (Plasma and Serum)

Leave a Comment / Biological Sample Prep / By Dr.Xu / April 7, 2026

Challenges of Plasma Matrices: Proteins and Phospholipids Plasma and serum represent some of the most challenging biological matrices for analytical chemists. These complex fluids contain approximately 7% protein content, with albumin, globulins, and fibrinogen being the major constituents that increase sample viscosity and promote clot formation. More critically, plasma contains significant concentrations of phospholipids—typically 1-2 […]

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Preventing Matrix Effects in LC-MS Using SPE

Leave a Comment / LC-MS Sample Preparation / By Dr.Xu / April 4, 2026

1. Matrix Effect Overview in LC-MS Analysis Matrix effects represent one of the most significant challenges in liquid chromatography-mass spectrometry (LC-MS) analysis, particularly when dealing with complex biological and environmental samples. These effects occur when co-eluting compounds from the sample matrix interfere with the ionization process of target analytes, leading to either suppression or enhancement

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SPE cartridge preparation for LC MS analysis

Choosing SPE Cartridges for LC-MS Applications

Leave a Comment / LC-MS Sample Preparation / By Dr.Xu / March 30, 2026

1. Importance of Clean Extracts for LC-MS Liquid chromatography-mass spectrometry (LC-MS) has become the gold standard for sensitive and selective analysis across pharmaceutical, environmental, and clinical applications. However, the success of any LC-MS analysis hinges on the quality of sample preparation, particularly the cleanliness of extracts. Clean extracts are not merely desirable—they are essential for

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environmental lab technician preparing samples with SPE

Environmental Sample Preparation Techniques

Leave a Comment / Environmental Sample Prep / By Dr.Xu / March 23, 2026

Overview of Environmental Sample Matrices Environmental sample preparation presents unique challenges that distinguish it from clinical or pharmaceutical applications. As noted in the literature, environmental chemists routinely deal with large volume samples – often liters rather than milliliters – due to the trace-level concentrations of pollutants typically found at part-per-billion (ppb) or part-per-trillion (ppt) levels.

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laboratory cleaning biological samples using SPE

Biological Sample Cleanup Using SPE Cartridges

Leave a Comment / Biological Sample Prep / By Dr.Xu / March 22, 2026

Types of Biological Matrices in SPE Applications Solid-phase extraction (SPE) has become an indispensable tool for biological sample preparation across diverse fields including clinical chemistry, forensic science, and pharmaceutical research. The technique’s popularity stems from its ability to achieve high selectivities and recoveries while minimizing hazardous solvent consumption. Biological matrices present unique challenges that require

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LC-MS sample preparation using SPE cartridges

Sample Preparation for LC-MS: Why SPE Is Essential

Leave a Comment / LC-MS Sample Preparation / By Dr.Xu / March 22, 2026

Overview of LC-MS Analytical Workflows Liquid Chromatography-Mass Spectrometry (LC-MS) has become the gold standard for analytical chemistry across pharmaceutical, environmental, and clinical laboratories. The typical LC-MS workflow involves several critical steps: sample collection, preparation, chromatographic separation, ionization, mass analysis, and data interpretation. While the instrumentation has advanced dramatically, the sample preparation stage remains the most

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