Events: Visit LECO at RAFA 2017

07-11-2017 • Separation Science Mass Spectrometry

BT-Monitor

Recent Advances in Food Analysis

November 7-10, 2017 | Prague, Czech Republic

Here at LECO we strive to give our customers the results they need to confidently identify what’s unknown in their samples. Our Separation Science instruments offer unparalleled separation, accuracy, resolving power, deconvolution, and speed to characterize and identify more analytes than ever before. See for yourself at RAFA 2017.

Breakfast Seminar

Wednesday, November 9 | 7:45 -8:30 am

GC-TOFMS – The Ideal Tool for Non-Target Screening of Food Migrants

Discover how today’s manufacturers are using GC-TOFMS to identify unknown contaminates in their food and beverage products.

The migration of compounds from food packaging has become one of the food industry’s hottest topics with regards to the contamination of packaged foodstuff. This LECO-sponsored workshop will demonstrate how a greater amount of information can be gained by using of time-of-flight mass-spectrometry (TOFMS). This technique provides fast and sensitive acquisition of unskewed full mass spectra, making GC-TOFMS the technique of choice in non-targeted examination of NIAS components in food samples. Several case studies will be presented. A complimentary breakfast will be served for all workshop participants.

Presentations of Interest

SPME-GC-HR-TOF-MS-based Search for Off-Flavor Compounds in Chocolate Advent Calendars

Jaromír Hradecký, Eliška Kludská & Jana Hajšlová | Dept. of Food Analysis and Nutrition, University of Chemistry and Technology, Czech Republic

Abstract: Identification of compound(s) responsible for food off-flavor often represents a challenging analytical task, since these compounds might have a very low odor threshold. It is rather difficult to identify them, especially when present in a complex mixture. For this purpose, head-space solid-phase microextraction sampling followed by gas chromatography – mass spectrometry (SPME-GC-MS) employing time of flight (TOF) mass analyzer seems to be the optimal option.

Within our study, both low resolution TOF and high resolution (HR-TOF) MS were employed. Non-target screening in a set of advent calendars was performed with the aim to access aroma quality. Statistical compare – peak alignment tool was used and data matrix was then processed using multivariate statistical analysis. Surprisingly, styrene, a possible human carcinogen, migrating from plastic packaging was discovered at a significant level in one of the chocolate samples, dedicated for children. Unknown off-flavor compounds in chocolate from one of the calendars were identified using HR-TOF MS. Acrylates, responsible for an unpleasant smell of chocolate were identified in green painted parts of wholesale cardboard box. According to obtained results, SPME-GC-(HR)TOF-MS proved to be a reliable tool for non-target screening and unknown identification.

Investigation of Extracted and Leached Analytes from Packaging Materials with GC-TOF MS

Tomáš Kovalczuk (LECO Instrumente Plzeň., Czech Republic), Elizabeth M. Humston-Fulmer, Joe Binkley (LECO Corporation, St. Joseph, MI USA)

Abstract: Migration of analytes from packaging material into food products is a concern for manufacturers and consumers because of the potential to contaminate food and beverages. The extraction and/or leaching can impact the quality of the product, the integrity of the packaging material, and cause concern related to consumer health and product safety. A general extraction of a variety of food packaging products, including sealable plastic bags and plastic food containers, was performed. Solvent was placed inside each packaging product for an extended period of time and then concentrated through evaporation prior to analysis. General screening of this extract with non-targeted analytical techniques was used to understand what analytes were present and may have the potential to migrate into the food. GC was used for separating analytes from each other and TOFMS provided full mass range data. Nominal mass TOFMS data were acquired and were searched against library databases for tentative identifications. High resolution TOFMS data were also acquired to add confidence to identifications with accurate mass information. Several analytes were determined in the various packaging types and are highlighted here.

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