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Performing Solid Phase Extraction (SPE) manually can be time consuming and nerve-racking, especially when recovery and reproducibility are lacking due to sample variability. If SPE can be reliably automated, it becomes a much more efficient and reproducible process.
The GERSTEL CTS is used for cryogenic trapping and concentration of analytes. The CTS enables improved separation and lower detection limits. Following the concentration step, analytes are introduced to the GC column using a highly accurate temperature program. The CTS can be used in a single-column GC system placed at the head of the column or between the pre-column and the analytical column in a multidimensional system in order to refocus analytes prior to analytical separation.
Extraction in Seconds
DPX is a fast and efficient SPE technique used for a wide rnge of applications such as drugs of abuse, therapeutic drug monitoring, comprehensive screening, pharmacology studies (NNK), as well as pesticides in fruit and vegetables. DPX is based on unique and patented SPE devices: Pipette tips that incorporate loosely contained sorbent material, which is mixed with the sample solution. Turbulent air bubble mixing creates a suspension of sorbent in the sample ensuring optimal contact and highly efficient extraction. The extraction is performed much faster than with traditional SPE techniques.
The GERSTEL MultipurposeSampler (MPS) and its versatile sample preparation modules makes online sample preparation directly before injection possible. Its modular design means that many processes can be adapted and implemented.
GERSTEL GRAPHPACK technology was designed to provide leak-free, low dead volume, inert connections quickly and reliably for any type of connection used for gas chromatography. The same technology is used for inlet and detector connections as well as for column connections (with or without make-up gas) and multiple column splitters. GRAPHPACK fittings exist for almost all GC inlets and detectors, so a laboratory with multiple brands of GCs can use the same ferrules, adapters, and nut for all connections needs.
Water analysis can be complicated if the sample contains a large proportion of suspended substances and foreign particles.
Membrane extraction promises simplification in this case: a novel procedure for sample preparation developed by the Environmental Research Centre Leipzig-Halle, which has been automated by GERSTEL.
The most advanced column switching system available, providing unsurpassed flexibility for gas chromatographic analysis.
The multidimensional heartcutting chromatography system from GERSTEL finally does away with the complexity and operational difficulties of the past. The system is based on advanced electronic pneumatic control EPC and GERSTEL GRAPHPACK technology allowing unprecedented ease of use and reproducibility.
The GERSTEL PFC automatically collects compounds after gas chromatographic separation. The PFC is equipped with six sample traps and one waste trap. Traps are available in 1 µl or 100 µl volumes.
For optimum compound recovery, the PFC can be equipped with optional LN2 trap cooling or cryostatic trap cooling systems.
Gas chromatography (GC) experts rely on sharp peaks and baseline resolution to provide accurate answers. To perform chromatographic analysis of real-world samples, analysts often must deal with either complex sample types such as essential oils and petroleum fractions, or complex matrices like biological fluids, foods, sludge, or polymers. Once the sample has been prepared for analysis, separation of all the individual compounds present by means of a single chromatographic separation can be challenging due to the compounds having different ranges of polarity, boiling point, solubility, MW, and concentration. It is therefore necessary to use innovative yet robust techniques that go beyond using a single chromatographic dimension to achieve compound separation.
Twister® Back Extraction as MPS Option
The combination of Twister technology (SBSE; Stir Bar Sorptive Extraction) with elution and subsequent chromatographic detection can be powerful and reproducible process for the determination of organic analytes from aqueous samples; e.g. PAH, psticides, herbicides or phenols.