SWING QUECHERS: Automated Sample Preparation and Analysis of Pesticide Residues in Food Samples

QuEChERS sample preparation procedure combined with our overhead gravimetric (patented) capability and our user-friendly software, allow you to automatically analyze pesticide residues in food samples.

QuEChERS, standing for Quick, Easy, Cheap, Effective, Rugged, and Safe is readily accepted by both the Association of Analytical Communities (AOAC) and the Committee of European Normalization (CEN) for the analysis of pesticide residues in food and agricultural products.

QuEChERS is a simple and straightforward sample preparation technique for multi-residues screening. Multi-residue methods increase sample throughput, decrease sample turnaround time, and optimize analyst efficiency. The QuEChERS method is a two-step process: clean up followed by extraction.

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Clean-up workflow

The purpose of this step is to remove matrix effects like polar pigments, organic acids, sugars and lipids from the sample by a sorbing material to increase the method’s robustness.
SWING QuEChERS Clean-up workflow

SWING QuEChERS workstation

The Swing QuEChERS workstation

402 Pesticides residues in one 10 minute run at 10 ng/g (ppb)

402 Pesticides residues in one 10 minute run at 10 ng/g (ppb)

There are well over 1’000 targeted analytes of pesticides and their metabolites being monitored in food commodities at present. Laboratories are being asked to broaden their range and increase the quality of their pesticide analysis whilst management is demanding cost reductions.

By introducing the SWING QUECHERS, Chemspeed offers unattended automation for the complete QuEChERS workflow. The platform can be configured in two different ways to reflect the analytical chemists’ needs:

1. Throughput optimized configuration (for the workflow depicted below)

  • Up to 72 samples in 8 hours or 216 samples per day*.
  • Sample preparation methods using kits (e.g. Waters, Agilent, Thermo).
  • Preprogrammed testing templates.

2. Cost optimized configuration (for the workflow depicted below)

  • Up to 36 samples in 8 hours or 108 samples per day*.
  • Sample preparation methods using cost-effective disposable Falcon tubes and reagents purchased in bulk.
  • Preprogrammed testing templates.

*Throughputs are strongly dependent on QuEChERS method, contact your Chemspeed representative for the precise throughput estimation of your specific method.

Extraction workflow

The purpose of this step is to extract pesticide residues into an organic solvent. A solid-liquid extraction with addition of salts to control pH and ionic concentration is performed.

SWING QuECHeRS extraction workflow

Technical Details

Chemspeed’s Swing QuEChERS deck modularity allows the user to execute and perform a variety of food analysis workflows in a fully automated fashion.

Rack for Sample Preparations (Falcon tubes)

Rack for Sample Preparations (Falcon tubes)

  • Rack for 32 Falcon tubes.
  • Shaking capability (up to 1’400 rpm ).
  • Heating / cooling capability.
Rack for Sample Preparations (30 mL vials)

Rack for Sample Preparations (30 mL vials)

  • Rack for 36×30 mL vials.
  • Shaking capability.
Rack for Sample Preparations (10 mL vials)

Rack for Sample Preparations (10 mL vials)

  • Rack for 78×10 mL vials.
  • Shaking capability (up to 1’400 rpm).
  • Heating / cooling capability.
Rack for Sample Preparations (2 mL GC/LC vials)

Rack for Sample Preparations (2 mL GC/LC vials)

  • Rack for 96×2 mL vials (GC, LC).
  • Shaking capability (up to 1’400 rpm).
Evaporation Unit performed under N2 flow

Evaporation Unit

  • Evaporation performed under N2 flow.
High Shear Homogenizer

High Shear Homogenizer

  • Sample volume: 5-1’000 mL.
  • Speed range: 11’000-30’000 rpm.
  • 4 cutter sizes.
  • Dedicated dynamic rinsing and drying station.
Ultrasonic Probe

Ultrasonic Probe

pH-Probe

pH-Probe

Injection Valve for GC / HPLC

Injection Valve for GC / HPLC

 

Available upgrade options:

Centrifuge Sartorius-Sigma

Centrifuge Sartorius-Sigma:

  • Speed range up to 15’000 rpm.
  • Suitable for low speeds.
  • Accuracy +/- 1 rpm.
  • Cooling capability.
  • Up to 28 Falcon tubes run in parallel.

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Phone: +41 (0) 61 816 95 00
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