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Sample preparation

Knauer

  • Liquid sampler / headspace / automatic / for HPLC
  • Liquid sampler / headspace / automatic / for HPLC
  • Liquid sampler / headspace / automatic / for HPLC

3950

Article: 00121779

Liquid sampler / headspace / automatic / for HPLC

The Autosampler 3950 can inject from up to 768 positions when equipped with microtiter plates (either high or low formats) or from up to 96 standard 2 ml sample vials. Sample carryover is significantly minimized thanks to a highly-effective interior and exterior needle wash procedure. This autosampler is also fast and flexible: one complete sample injection cycle takes less than one minute, including needle wash. Three different injection modes are supported; ?full loop filling? (highest precision and reproducibility), ?partial loop filling? (variable volumes, e.g. for dilution series) and ?µl pickup? (loss-free injection of extremely small sample volumes), allowing the user to optimize sample usage. The headspace pressure function prevents bubbles from forming in the vial during sample uptake. Precolumn derivatization is supported.

For high-pressure injections of up to 1000 bar, the autosampler is equipped with a so-called ILD? valve (Intermediate Loop Decompression). This valve consists of a rotor-stator combination and includes a central port for depressurizing. For highpressure applications, the sample loop is depressurized prior to receiving the sample. This way, the sample is not diluted with solvent. Because the valve is switched extremely fast, pressure spikes are reduced. Analyses are more precise and wear of the column is reduced.
Key features

1000 bar
0.1-5000 µl injection volume
PASATM (pressure-assisted sample aspiration)
ILD (intermediate loop decompression)
cooling/heating version (4-40°C)

Specifications

  • Sample type: liquid
  • Technology: headspace, automatic
  • Applications: for HPLC

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