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MELIBE LEONINA
Sample Preparation
SPE cartridges, QuEChERS kits, membrane filters, and sample prep accessories for chromatography and environmental workflows.
C18 SPE Cartridge, 500mg/6mL, 30/unit
SKU: SPE-01-6500
AOAC QuEChERS, dSPE Kit, 2mL, 100/unit
SKU: QQX-02-2035-K
EN QuEChERS, Extraction Pouch, 50mL, 100/unit
SKU: QQX-50-0010-P
AOAC QuEChERS, Extraction Pouch, 50mL, 100/unit
SKU: QQX-50-0020-P
AOAC QuEChERS, Extraction Pouch, 15mL, 100/unit
SKU: QQX-15-0031-P
Dry Bath Incubator w/ 15 X 2mL Tube Rack, 1/unit
SKU: XQB-15-0025
Labeling Tape, Rainbow, 1/2in, 24/unit
SKU: TC-05-RNBW
Labeling Tape, Rainbow, 1in, 12/unit
SKU: TC-10-RNBW
Dry Bath Incubator, w/ 15 X 1.5mL Tube Rack, 1/unit
SKU: XQB-15-0015
Labeling Tape, Rainbow, 3/4in, 16/unit
SKU: TC-75-RNBW
Autoclave Tape, 1in, 3/unit
SKU: WAT-01-2160
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Sample Prep for Better Results
Clean sample preparation is the foundation of accurate analytical results. Our sample prep products help you extract, concentrate, and clean up analytes before injection into your HPLC, GC, or LC-MS system.
METHOD GUIDE
QuEChERS: AOAC vs. EN Method
| Feature | AOAC Method 2007.01 | EN Method 15662 |
|---|---|---|
| Buffering | Sodium acetate buffer (pH 4.8) | Citrate buffer (pH 5.0–5.5) |
| Best For | Fatty matrices, broader analyte range | High-water content produce |
| pH-Sensitive Analytes | Good stability | Better stability for base-sensitive compounds |
| Regulatory Use | US EPA, FDA methods | European standard methods |
| Extract Cleanup | dSPE with PSA + MgSO₄ | dSPE with PSA + MgSO₄ |
WORKFLOW
SPE Cartridge Workflow
1
Condition
Activate the sorbent bed by passing methanol followed by water (or appropriate conditioning solvent) through the cartridge. Do not let the bed dry out between steps.
2
Load Sample
Pass your sample through the conditioned cartridge at a slow, steady flow rate. The target analytes bind to the sorbent while matrix components pass through.
3
Wash
Remove remaining matrix interferences with a wash solvent that retains your analytes on the sorbent. Solvent choice depends on the sorbent chemistry.
4
Elute
Elute your purified analytes with a strong solvent that disrupts their interaction with the sorbent. Collect the eluate for concentration and analysis.
💡SPE Sorbent Selection
C18 — Reversed-phase retention of non-polar to moderately polar analytes from aqueous samples. The most common SPE sorbent. MCE (Mixed Cellulose Ester) — Membrane filters for particulate removal and microbiology applications.
🛠️Filter Plates vs. Membrane Filters
96-well and 384-well filter plates enable high-throughput parallel sample cleanup using vacuum or centrifugation. Individual membrane filters are used for gravity or vacuum filtration of single samples. Choose based on your throughput needs.
FREQUENTLY ASKED
Sample Preparation FAQ
We carry C18 reversed-phase SPE cartridges as our primary offering. Contact us with your analyte and matrix for specific sorbent chemistry recommendations for ion-exchange, normal-phase, or mixed-mode applications.
Yes. We carry QuEChERS extraction and dSPE cleanup kits in both AOAC 2007.01 and EN 15662 method formats for pesticide residue analysis in food and agricultural samples.
We carry 96-well and 384-well filter plates with various membrane types and pore sizes for protein precipitation, sample clarification, and phospholipid removal workflows.
Yes. We carry qualitative filter paper for general gravity filtration and particulate removal. Available in standard diameters for use with glass funnels.
Yes. Our team includes analytical chemists who can help with method development, troubleshooting, and optimization. Contact us with your application details.
Need a complete sample prep workflow?
Pair sample prep products with our syringe filters and autosampler vials for a seamless analytical pipeline.