Ontwsep™ QuEChERS
Ontwsep™ QuEChERS is a widely used sample preparation method, extensively applied in the detection of contaminants in food, environmental water, and soil samples.
Utilizing high-efficiency extraction salt packets and purification tubes, Ontwsep™ QuEChERS separates target components from interfering substances (such as fatty acids, pigments, lipids, etc.) through a simple centrifugation process
This method is characterized by its simplicity, rapid processing, low solvent consumption, and cost-effectiveness compared to traditional solid-phase extraction (SPE) columns.
Method Workflow
1. Sample Preparation: Weigh the sample and place it into a centrifuge tube.
2. Extraction: Add extraction salts and solvents, then shake vigorously.
3. Centrifugation: Centrifuge to separate the target analytes from the matrix.
4. Purification: Transfer the supernatant to a purification tube for further cleanup.
5. Analysis: Analyze the purified extract using appropriate detection methods (e.g., GC-MS, LC-MS).
Ontwsep Extraction Salt Packets
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Product Code
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Method
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Product Description
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Specification
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QY-0001-50
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AOAC Method (15g sample)
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QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1.5g anhydrous sodium acetate
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50 packets/box
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QY-0002-50
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EN Method (10g sample)
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QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1g sodium citrate, 0.5g disodium hydrogen citrate, 1g NaCl
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50 packets/box
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QY-0003-50
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EN Method (15g sample)
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QuEChERS extraction salt packet: 6g anhydrous MgSO₄, 1.5g sodium citrate, 0.75g disodium hydrogen citrate, 1.5g NaCl
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50 packets/box
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QY-0004-50
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Original Method (10g sample)
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QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1g NaCl
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50 packets/box
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QY-0005-50
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Original Method (15g sample)
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QuEChERS extraction salt packet: 6g anhydrous MgSO₄, 1.5g NaCl
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50 packets/box
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Ontwsep QuEChERS Purification Tubes
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Product Code
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Method
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Product Description
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Centrifuge Tube
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Packaging
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QEC-1001-02-100
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AOAC Method (General fruits and vegetables)
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150mg MgSO₄, 50mg PSA
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2mL
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100 tubes
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QEC-1001-15-50
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AOAC Method (General fruits and vegetables)
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1200mg MgSO₄, 400mg PSA
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15mL
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50 tubes
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QEC-1002-02-100
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EN Method (General fruits and vegetables)
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150mg MgSO₄, 25mg PSA
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2mL
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100 tubes
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QEC-1002-15-50
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EN Method (General fruits and vegetables)
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900mg MgSO₄, 150mg PSA
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15mL
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50 tubes
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QEC-1003-02-100
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AOAC Method (Waxy or fatty fruits and vegetables)
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150mg MgSO₄, 50mg PSA, 50mg C18
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2mL
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100 tubes
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QEC-1003-15-50
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AOAC Method (Waxy or fatty fruits and vegetables)
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1200mg MgSO₄, 400mg PSA, 400mg C18
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15mL
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50 tubes
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QEC-1004-02-100
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EN Method (Waxy or fatty fruits and vegetables)
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150mg MgSO₄, 25mg PSA, 25mg C18
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2mL
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100 tubes
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QEC-1004-15-50
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EN Method (Waxy or fatty fruits and vegetables)
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900mg MgSO₄, 150mg PSA, 150mg C18
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15mL
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50 tubes
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QEC-1005-02-100
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AOAC Method (Pigmented fruits and vegetables)
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150mg MgSO₄, 50mg PSA, 50mg GCB
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2mL
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100 tubes
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QEC-1005-15-50
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AOAC Method (Pigmented fruits and vegetables)
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1200mg MgSO₄, 400mg PSA, 400mg GCB
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15mL
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50 tubes
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QEC-1006-02-100
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EN Method (Pigmented fruits and vegetables)
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150mg MgSO₄, 25mg PSA, 2.5mg GCB
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2mL
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100 tubes
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QEC-1006-15-50
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EN Method (Pigmented fruits and vegetables)
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900mg MgSO₄, 150mg PSA, 15mg GCB
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15mL
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50 tubes
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QEC-1007-02-100
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AOAC Method (High pigment and fatty fruits and vegetables)
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150mg MgSO₄, 50mg PSA, 50mg C18, 50mg GCB
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2mL
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100 tubes
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QEC-1007-15-50
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AOAC Method (High pigment and fatty fruits and vegetables)
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1200mg MgSO₄, 400mg PSA, 400mg C18, 400mg GCB
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15mL
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50 tubes
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QEC-1008-02-100
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EN Method (High pigment fruits and vegetables)
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150mg MgSO₄, 25mg PSA, 7.5mg GCB
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2mL
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100 tubes
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QEC-1008-15-50
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EN Method (High pigment fruits and vegetables)
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900mg MgSO₄, 150mg PSA, 45mg GCB
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15mL
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50 tubes
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Custom Specifications Available
The Ontwsep QuEChERS Extraction Salt Packets contain MgSO₄ to remove moisture from samples. The Ontwsep QuEChERS Purification Tubes consist of adsorbents and anhydrous MgSO₄. Common adsorbents include PSA, C18, and Garb:
Garb: Strong adsorption capacity for pigments, suitable for heavily pigmented fruits, vegetables, and complex matrices like herbs and tea.
C18: Reversed-phase C18 adsorbent for retaining non-polar compounds such as lipids.
PSA: Adsorbs carbohydrates, organic acids, fatty acids, phenols, and minor pigments in pesticide residue analysis.
