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The Agitator/Stirrer for the GERSTEL MultiPurpose Sampler (MPS) can either operate in agitation or stirring mode using conventional magnetic stir bars. Stirring helps efficiently mixing heterogeneous or viscous samples, accelerates equilibration for headspace sampling and extends the lifetime of SPME fibers.
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 ATEX option enables the introduction of liquid samples directly into micro-vial inserts used for thermal Desorption / Thermal Extraction in the TDU. Extracted analytes are refocused and concentrated in a Cooled Injection System (CIS) inlet prior to introduction to the GC/MS system.
The Sample ID (SID) 1D/2D Barcode reader for the GERTEL MultiPurpose Sampler (MPS) uses a dual camera setup and image analysis for positive identification of samples. SID can be connected to a PC or via LAN using USB connectivity.
Fully implemented into the MAESTRO software, SID enables independent sample logging or fully integrated sample ID transfer to the data file with multiple user-defined options for sample verification and the handling of deviations.
The GERSTEL CF200 is a powerful centrifuge for the GERSTEL MultiPurpose Sampler (MPS Robotic). The CF200 performs centrifugation of up to 6 samples at up to 4500 rpm/2000g. Centrifugation power can be specified in rpm or in g foce using the GERSTEL MAESTRO Software.
The GERSTEL Cooled Agitator is a modified version of the standard 6 position agitator used with the MultiPurpose Autosampler. It incorporates a Peltier based cryostat that allows samples can be cooled down to 10C and is also useful when stable ambient temperature are required.
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.
Automated Dynamic Headspace (DHS) is available for the GERSTEL MultiPurpose Sampler (MPS). The DHS station efficiently extracts and concentrates VOCs from liquid or solid sample placed in standard Headspace vials (DHS) or in larger sample containers up to 1 L volume (DHSLarge). The sample is thermostated and agitated while the headspace is purged with a controlled flow of inert gas, providing controlled and efficient extraction conditions. Sample temperatures can be selected from 10oC to 200oC. Lowering the temperature provides a means of reducing the amount of water vapor released and ultimately retrapped. The DHS station additionally holds a replaceable adsorbent- or sorbent filled tube used for analyte concentration. The temperature of the adsorbent tube during the DHS process can be varied from 20oC to 70oC for optimal trapping of the analytes in question.
The DHS can be extended with the DHSLarge module to perform analysis of large or inhomogeneous bulk samples. For example, consumer products, packaging or flooring material can be placed directly in sample containers up to 1L in volume. Sample holders are available for flooring material, eliminating interfering emissions from the edges of the cut sample. Purge periods can be introduced to simulate air exchange conditions in environmental chambers. A series of analyses can be performed on a sample to determine emission behavior over time. DHS operation or DHSLarge operation is selected by mouse-click.
Automated Filtration Using The MPS
Suspended particles and matrix material in a sample can significantly influence analysis results and system suitability. Removing particulate matter from a sample or extract prior to analysis is therefore critical for many GC/MS- and LC/MS analysis methods, particularly when large series of samples must be analyzed automatically.
Unlike traditional electronic noses that are based on solid-state sensors, the GERSTEL ChemSensor System use proven quadrupole mass-spectrometer technology.
The GERSTEP MPS configured as Headspace Autosampler provides the analyst with a high productive tool for performing GC Headspace analysis. The MPS is perfectly suited for routine analysis for R&D applications that demand a higher degree flexibility.
GERSTEL provides a wide range of cooled trays and stacks for the MPS Robotic series either as part of an analysis system or as an off-line WorkStation. Trays and stacks available with Peltier cooling or cryostatic cooling covering a temperature range from 4 to 70C.
The MAESTRO software operates all GERSTEL modules and system solutions in a simple and efficient manner. MAESTRO can be operated as stand-alone software or fully integrated with the Agilent Technologies ChemStation. Just one method and one sequence table runs the complete system from Sample Prep and Sample Introduction to GC/MS or LC/MS analysis. Set-up is performed in a very simple manner: By mouse-click.
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.
Focusing on the core taks of an autosampler, the MPS Liquid offers large sample capacity, modern intuitive software control, as well as the capablity to perform key sample preparation steps such as the addition of internal standards or a derivatization reagent. The MPS helps you ensure that your laboratory offers fast, responsive and productive analyses. Last but not least, the MPS Liquid helps to ensure that your results are reliable and accurate.
Fully automated solvent evaporation integrated with your sample preparation.
The GERSTEL Multi-Position Evaporation Station (mVAP) performs solvent evaporation enabling automated sample concentration for lower detection limits as well as solvent exchange for improved chromatography and LC/MS ionization. mVAP is an option for the GERSTEL MultiPurpose Sampler (MPS): Up to 196 samples in standard autosampler vials can be concentrated in batches of up to six.
The GERSTEL Olfactory Data Interpreter (ODI) enables fast and reliable evaluation of olfactory information including identification of unknown odor-active compounds. Chromatography data is typically acquired using a mass spectrometer / mass selective detector (MSD), a Flame Ionization Detector (FID) or a Sulfur Chemiluminescence Dectector (SCD) or a combination thereof. The chromatogram is loaded into the ODI software, which automatically recognizes the chromatogram data format before importing the data. In parallel, an olfactogram is imported with information provided by the user as he or she assessed odors eluting from the GC column in parallel with the detection process during the GC run. The olfactogram combines spoken comments from the sensory analyst and the registered intensities along a time axis. The „Olfactory Intensity Device“ (OID) conveniently enables the user to indicate the intensity of the olfactory impression as it transpires. Text comments are added using voice recognition software to translate spoken descriptors. The combined information is presented in the ODI-Software in a clear and concise overview including a chromatogram, an olfactogram and a table.
quickMix for the GERSTEL MPS Robotic series enables extremely fast and efficient mixing nad extraction of samples as part of the automated sample preparation process.
The mixing power is comparable to that of vortex mixing. Samples are agitated in a special tray on the module, depending on the vial size holding up to 6 samples at a time. The tray can be exchanged to operate with 2 mL, 4 mL, 10 mL and 20 mL vials. If needed, quickMix can be configured with a heated tray.
Solid Phase Micro Extraction (SPME) is widely used technoque for extraction and concentration of VOCs and SVOCs combined with GC/MS. SPME is especially useful in the food, flavor and beverage industries and for environmental monitoring.
The MPS Robotic is a highly efficient GC/MS and LC/MS autosampler with extended robotic functionality. The MPS robotic provides reliable and efficient processing of complex tasks. Syringes are mounted in individual syringe modules, which be exchanged automatically within a running sequence when using the MPS RoboticPro for maximum flexibility.
Solid Phase Micro Extraction (SPME) is a widely used technique for extraction and concentration of VOCs and SVOCs combined with GC/MS. SPME is especially useful in the food, flavor and beverage industries and for environmental monitoring. Recent developments focus on increased phase volumes to reach sensitivities more comparable to the GERSTEL-Twister. The Thin Film SPME (TF-SPME) technology combines higher sorbent phase volumes and a large surface area based on a flat rectangular shape.
For Multi-Stir Bar Sorptive Extraction (mSBSE).
The GERSTEL Twicester® offers a simple possibility to position one or more Twisters magnetically on the inner wall of a sample vial for more efficient sample extraction. The Twicester approach enables the extraction of a sample using more Twisters simultaneously, for example using Twisters with different types of phases for a more complete combined extraction and improved analyte recovery. The method, referred to as Multi-Stir Bar Sorptive Extraction (mSBSE), was developed in a cooperation between GERSTEL K.K, Tokyo, Japan , and Research Institute for Chromatography (RIC) of Professor Pat Sandra in Kortijk, Belgium. Twicester is well suited for the simple and efficient determination of a wide range of flavor compounds in aqueous matrices and it has been used successfully for the analysis of beverages.
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.
The GERSTEL Twister® enables efficient extraction of organic compounds from aqueous matrices based on Stir Bar Sorptive Extraction (SBSE). SBSE is a solvent-free extraction technique, which is significantly faster than most conventional extraction techniques. SBSE is up to 1000x more sensitive than SPME since the stir bar has significantly more sorbent volume and since it can extract, and concentrate analytes from, a much larger sample volume due to the efficient stirring.
Standard autosampler vials are placed in the balanec by the MPS and liquid samples, stnadards, reagents or diluents added, weighed and registered separately. For each sample, mulitple liquid additions can be defined by mouse-click in the MAESTRO Software.
Flexible and reliable sample preparation robot providing efficient automation of your laboratory processes.
The GERSTEL MuliPurpose Sampler (MPS) provides a wide range of capabilities in one robotic system. The MPS WorkStation is a bench-top version of the MPS, independent of the GC/MS or LC/MS analysis system. The WorkStation can be configured as Single Head or Dual Head version enabling it to perform a range of functions to meet almost every requirements in terms of performance and throughput. The MPS WorkStation provides complete flexiblity. In combination with the GERSTEL MAESTRO software, the MPS WorkStation offers simple set-up and advanced automation capabilities.