QuEChERs

(55 products)

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

Product Code	Method	Product Description	Specification
QY-0001-50	AOAC Method (15g sample)	QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1.5g anhydrous sodium acetate	50 packets/box
QY-0002-50	EN Method (10g sample)	QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1g sodium citrate, 0.5g disodium hydrogen citrate, 1g NaCl	50 packets/box
QY-0003-50	EN Method (15g sample)	QuEChERS extraction salt packet: 6g anhydrous MgSO₄, 1.5g sodium citrate, 0.75g disodium hydrogen citrate, 1.5g NaCl	50 packets/box
QY-0004-50	Original Method (10g sample)	QuEChERS extraction salt packet: 4g anhydrous MgSO₄, 1g NaCl	50 packets/box
QY-0005-50	Original Method (15g sample)	QuEChERS extraction salt packet: 6g anhydrous MgSO₄, 1.5g NaCl	50 packets/box

Ontwsep QuEChERS Purification Tubes

Product Code	Method	Product Description	Centrifuge Tube	Packaging
QEC-1001-02-100	AOAC Method (General fruits and vegetables)	150mg MgSO₄, 50mg PSA	2mL	100 tubes
QEC-1001-15-50	AOAC Method (General fruits and vegetables)	1200mg MgSO₄, 400mg PSA	15mL	50 tubes
QEC-1002-02-100	EN Method (General fruits and vegetables)	150mg MgSO₄, 25mg PSA	2mL	100 tubes
QEC-1002-15-50	EN Method (General fruits and vegetables)	900mg MgSO₄, 150mg PSA	15mL	50 tubes
QEC-1003-02-100	AOAC Method (Waxy or fatty fruits and vegetables)	150mg MgSO₄, 50mg PSA, 50mg C18	2mL	100 tubes
QEC-1003-15-50	AOAC Method (Waxy or fatty fruits and vegetables)	1200mg MgSO₄, 400mg PSA, 400mg C18	15mL	50 tubes
QEC-1004-02-100	EN Method (Waxy or fatty fruits and vegetables)	150mg MgSO₄, 25mg PSA, 25mg C18	2mL	100 tubes
QEC-1004-15-50	EN Method (Waxy or fatty fruits and vegetables)	900mg MgSO₄, 150mg PSA, 150mg C18	15mL	50 tubes
QEC-1005-02-100	AOAC Method (Pigmented fruits and vegetables)	150mg MgSO₄, 50mg PSA, 50mg GCB	2mL	100 tubes
QEC-1005-15-50	AOAC Method (Pigmented fruits and vegetables)	1200mg MgSO₄, 400mg PSA, 400mg GCB	15mL	50 tubes
QEC-1006-02-100	EN Method (Pigmented fruits and vegetables)	150mg MgSO₄, 25mg PSA, 2.5mg GCB	2mL	100 tubes
QEC-1006-15-50	EN Method (Pigmented fruits and vegetables)	900mg MgSO₄, 150mg PSA, 15mg GCB	15mL	50 tubes
QEC-1007-02-100	AOAC Method (High pigment and fatty fruits and vegetables)	150mg MgSO₄, 50mg PSA, 50mg C18, 50mg GCB	2mL	100 tubes
QEC-1007-15-50	AOAC Method (High pigment and fatty fruits and vegetables)	1200mg MgSO₄, 400mg PSA, 400mg C18, 400mg GCB	15mL	50 tubes
QEC-1008-02-100	EN Method (High pigment fruits and vegetables)	150mg MgSO₄, 25mg PSA, 7.5mg GCB	2mL	100 tubes
QEC-1008-15-50	EN Method (High pigment fruits and vegetables)	900mg MgSO₄, 150mg PSA, 45mg GCB	15mL	50 tubes

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.