The GERSTEL MOSH/MOAH SamplePrepSolution performs fully automated sample preparation and determination of mineral oil residues in e.g. food and personal care products. The analysis time is only 30 minutes for MOSH and MOAH in one combined analysis run. The control software is fully integrated with the GC data handling software enabling simple and efficient analysis both for individual samples and for batches analyzed in an automated sequence. The GERSTEL ChroMOH data handling software performs automated and reproducible data evaluation even for difficult samples with user-defined reports available in different formats.
The GERSTEL MOSH/MOAH SamplePrepSolution is based on an online-coupled HPLC-GC-FID system with an integrated GERSTEL MultiPurpose Sampler (MPS robotic PRO) for automated sample preparation and introduction. In a first Normal Phase(NP)-HPLC step, the mineral oil residue is separated into two fractions: Mineral Oil Saturated Hydrocarbons (MOSH) and Mineral Oil Aromatic Hydrocarbons (MOAH). The fractions are then transferred to two separate GC channels in a dual channel GC-FID system for efficient simultaneous analysis.
The GERSTEL MOSH/MOAH SamplePrepSolution meets the requirements of the ISO20122 and DIN EN 16995 standard methods as well as the principles of the JRC guideline. Real time LC and GC chromatograms facilitate method development and system adjustments, such as optimizing switching times for the MOSH and MOAH fractions. The MOSH/MOAH system has a modular design that is easily expanded to automate additional, widely used sample preparation steps, such as epoxidation and removal of interfering natural olefins or AlOx clean-up to remove long-chain n-alkanes.
For particularly difficult samples, and for higher sample throughput with extra low limits of determination, the Sample Prep Station Saponification & Epoxidation performs batch processing of samples independent of the analysis system. Parallel processing results in optimized throughput, while increasing robustness and preventing contamination of the analysis system.
Fast and reliable results thanks to efficient automation and intuitive software.
- Determination of MOSH and MOAH in 30 minutes
- Integrated control of all method parameters, including sample preparation and LC, in an intuitive user interface
- Unique transverse mounted GC columns provide easy access for simplified maintenance
- Flexible adaptation to individual requirements or changing needs
- Modular extension of sample preparation steps such as epoxidation or AlOx cleanup
- Efficient MOSH/MOAH data processing and reporting with GERSTEL ChroMOH, including data from other analysis systems
- Highly experienced application support
GERSTEL ChroMOH
When analyzing food, packaging and consumer goods for mineral oil hydrocarbon residues (MOSH/MOAH), the resulting complex chromatograms must be processed using standardized methods. The GERSTEL ChroMOH software processes chromatograms individually or in batches and meets the requirements of ISO20122 and DIN EN 16995 - regardless of the system used to generate the data. ChroMOH has dedicated algorithms for peak and hump detection in MOSH/MOAH analysis and a specially adapted blank correction. All parameters and settings are stored in system profiles for use in automated processing or reprocessing of data with minimal manual steps required. In just a few clicks you can turn raw data into finished reports in Adobe® PDF, Microsoft® Excel or universal .txt format!
