Exosome Isolation: UC vs SEC vs Precipitation vs SmartSEC | BioCat

Exosomes underpin precision-medicine readouts across plasma/serum, urine, saliva, and cell culture media. The right isolation method balances purity, yield, hands-on time, and scalability, so your NTA traces, Westerns, small-RNA-seq, and MS data hold up under review. Recent guidance and vendor data below help you pick confidently.

Accelerate exosome isolation with products that enable fast, multiplexed exosome enrichment and purification from a wide range of biofluids.

Choose from:

• Differential Ultracentrifugation
• Size Exclusion Chromatography
• SmartSEC^TM Purification
• Polymer Precipitation
• Silicon Carbide (SiC) Purification

• Why use it: Flexible baseline method that many labs can implement; density cushions/gradients improve selectivity.

• Watch out for: Invisible pellets, co-pelleting of proteins/lipoproteins, long spins; always confirm by markers and orthogonal QC.

• Best for: Discovery work when time/equipment are available; can be combined with a polishing step (e.g., SEC).

• Why use it: Gentle, reproducible separation that reduces soluble protein and lipoprotein carryover—great for proteomics and clinical plasma/serum; also validated for cell-culture media (CCM).

• How it runs: Equilibrate, load, collect fractions, keep the EV-rich/low-protein window (map with A280 and/or NTA).

• Best for: Cleaner inputs for MS, biomarker studies, and cross-study comparability.

• What it is: Chromatography-based SEC evolution with a contaminant-trapping feature to overcome conventional SEC limitations; available in Single spin-columns (100-250µL), Mini spin-columns (as little as 10 µL input) and HT 96-well plates for plasma/serum.

• When to choose: Precious/low-volume bioliquids (Mini) or high-throughput cohort plasma/serum (HT) with consistent well-to-well EV yields.

Need to remove excess lipoproteins?

The SmartSEC-DeLipo^TM kit, engineered to provide unmatched purity and quality while efficiently depleting lipoprotein contaminants..

• Why use it: Fast, scalable, easy to train; ideal for screening and qPCR-first workflows.

• ExoQuick ULTRA extension: Adds a built-in column clean-up to drop albumin/Ig and other soluble contaminants; 250–500 µL serum/plasma inputs typical.

• ExoQuick UltraPure EV Isolation Kit for Serum and Plasma: Why choose between yield and purity? This next-generation EV isolation kit combines proprietary precipitation with advanced mixed-mode spin-column technology to deliver higher yields, cleaner EVs, and reliable results in just 20 minutes, no ultracentrifuge required.

• Best for: Throughput wins and rapid prototyping; consider an SEC/SmartSEC polish if heading to proteomics.

• What it is: Spin-column workflow using a proprietary SiC membrane and pH-conditioning to capture intact exosomes via surface-protein charge, then gently release them—an approach described in patent CA2929268A1 (Methods for Extracellular Vesicle Isolation and Selective Removal), which details SiC-based binding of EVs at a preselected pH and elution by pH shift.

• When to choose: RNA-centric studies across plasma/serum, urine, saliva, and CCM; detergent-free ExoR release buffer is compatible with most proteomic workflows.

• Best for: Short, instrument-light protocol; end-to-end kits (collection → EV → RNA) for consistent reporting.