GERSTEL

Automating epoxidation, saponification and data processing in MOSH/MOAH analysis of seasoning oil extracts is shown to improve efficiency and reproducibility

Sensory Directed Analysis quickly identifies off-odors associated with lipid oxidation in food products such as edible oils and fats. Automated solventless extraction of food products is carried out using DHS or direct thermal extraction. This is followed by a concentration step and GC-O/MS determination of odors. The use of olfactory and MS detection enables the simultaneous determination of sensory-active regions of the chromatogram and mass spectral identification of associated compounds. The dedicated evaluation software ensures an efficient identification of the off-odors based on the GC-O/MS data.

Fully automated method for 3-MCPD and Glycidol determination in edible oil by GC-MS, based on the widely used methods ISO 18363-1, AOCS Cd 29c-13, and DGF C-VI 18 (10). The automated GC-MS determination of 3-MCPD and glycidol in edible oils with evaporation step and GC column backflush ensures low LODs by eliminating excess derivatization reagent for improved method stability and system ruggedness.

Fully automated method for 3-MCPD, 2-MCPD and Glycidol determination in Edible Oil and Fat based on ISO 18363-4 - Zwagerman/Overman with validation data. A recent upgrade to PTV injection has further improved the quality and robustness of results. Fatty acid esters of 3- and 2-monochloropropanediol (3-MCPD-e, 2-MCPD-e) and glycidol (Gly-e) are process contaminants that are formed, for example, when edible oils and fats are refined. After ester cleavage during digestion in the human body they pose a relevant health risk and therefore need to be determined in edible oils and fats and in fat containing food.

The AppNote describes the fully automated determination of MOSH/MOAH in Food and Packaging extracts following DIN EN 16995. Industrial production, processing and transportation invariably put food at risk of contamination with MOSH/MOAH. To ensure a reasonable cost benefit balance, high laboratory productivity and good quality of results, leading contract laboratories increasingly strive to automate their processes. An example is the determination of MOSH/MOAH using a LC-GC-FID Coupling Platform. Depending on the sample matrix, additional automated sample preparation by aluminum oxide clean-up, epoxidation, and/or saponification is necessary prior to analysis. The dedicated evaluation software integrates the complex MOSH/MOAH chromatograms accurately and reproducibly.

Volatile flavor and aroma compounds are extracted and determined in e-liquids for regulatory compliance purposes using SBSE-TD-GC-MS, in an efficient solvent-free workflow.

VOCs collected from air onto a sorbent packed tube are released by thermal desorption and focused for GC-MS determination using the novel cryogen free dynamic focusing

Monitoring of per- and polyfluoroalkyl substances (PFAS) in air is successfully performed by the US EPA using Thermal Desorption-GC/MS.

Novel Thermal Desorption-GC/MS method for determination of formaldehyde using PFPH, automatically loaded onto Tenax TA adsorbent, as derivatization agent.

GERSTEL TD 3.5+ Thermal Desorber successfully passes method VDA278 system performance test for automobile material emissions increasing sample capacity and throughput.

VOCs collected from air onto a sorbent packed tube are released by thermal desorption and focused for GC-MS determination using the novel cryogen free dynamic focusing

Passive sampling of plant volatiles using TF-SPME and GERSTEL Twister, respectively, is compared with active sampling onto PDMS foam- and TenaxTA-filled Tubes

Lipid oxidation generates off-odors in food, edible oils, and fats. DHS or Thermal Extraction-GC–MS/O using Sensory Directed Analysis quickly identifies off-odors

An analytical approach combined with PCA is compared to sensory-directed analysis (SDA) for differentiating honey from multi-floral, wildflower, and clover sources

Determination of flavors in smoothies using standard- and solvent-swollen Twister® stir bars, liquid desorption, and LVI-GC/MS for enhanced recovery of polar compounds

Smart Ramped Pyrolysis-GC–MS analysis of forensic samples such as paint, adhesive tape, and mascara gives maximum information in a single run without method development

Smart-ramped pyrolysis-GC–MS analysis of forensic samples such as paint, adhesive tape, and mascara gives maximum info in a single run without method development.

Smart-ramped pyrolysis-GC–MS analysis of nylon material in consumer products, food packaging, and clothing generates info in one run without method development.

Smart-ramped pyrolysis-GC–MS analysis of (meth)acrylates in consumer products, caulk, and nail hardener gives maximum info in a single run without method development.

Solvent-free extraction by passive sampling using TF-SPME and HSSE, and by active pumped sampling onto sorbent tubes, are compared for TD-GC–MS analysis of volatiles.

Olfactory detection of sensory-active compounds guides GC–MS analysis for efficient flavour assessment of foodstuffs and their plant-based replacement products.

Solvent-free extraction and analyte concentration using TF-SPME and SBSE are optimized for TD-GC–MS determination of flavour compounds in hard seltzer beverages.

This study demonstrates the use of pyrolysis-(GC¬–)MS to generate simulated TGA-MS data for polymers. The mode of operation is also referred to as evolved gas analysis.

Smart-ramped pyrolysis-GC¬–MS analysis of microplastics in water filtration residue gives maximum info in one run. Examples are runoff, grey-, pond-, and bottled water.

A micro-scale chamber method performs DNPH derivatization and Tenax TA sorption for analysis of formaldehyde and carbonyl compounds by LC–UV, and VOCs by GC–MS.

Smart ramped pyrolysis-GC–MS analysis of forensic samples such as paint, adhesive tape, and mascara gives maximum info in a single run without method development.

Webinar Date/Time: Tuesday, January 31st, 2023 Session 1: 9am EST | 2pm GMT | 3pm CET Session 2: 2pm EST | 11am PST | 7pm GMT

Yoghurt aroma compounds and comprehensive profiles are determined using solvent swollen PDMS-Twisters for solvent assisted SBSE followed by Liquid Desorption-GC/MS, sensory assessment, and multi-variate analysis-based classification.