June 4 - 6, 2012
Crowne Plaza Hotel
St. Louis, MO
Vendor Session, Session Chair: Audra Gile
Rapid Simultaneous Carbon, Nitrogen and Sulfur Determination in Plant Tissue and Soils Matrix Using a High-Temperature Combustion Technique
Total carbon and total nitrogen content in soil play important parts in soil quality and crop production. Total nitrogen and sulfur content in plant leaf tissue is an indicator
of plant health and can be utilized as a diagnostic tool for understanding the plant’s nutritional uptake. Total carbon and nitrogen ratio in soils is utilized as a quality
indicator for nitrogen availability from organic sources. This presentation will review the advantages of the high-temperature combustion technique utilizing a LECO
TruMac CNS instrument in relation to total carbon, nitrogen, and sulfur determination in soils and plant tissue matrices, and will cover the instrument’s calibration and
analysis protocols, along with a review of soil and plant tissue data.
- Speaker: James Chang, Senior Applications Scientist, Thermo Fisher Scientific
A Growing Food Safety Trend: Targeted Analysis and Non-Targeted Screening using High-Resolution Accurate Mass (HR/AM) LC-MS/MS.
This presentation will focus on targeted analysis of organic contaminants in food matrices and non-targeted screening for unknowns. Partially fueled by the concern of
economic adulteration of food and beverages, a growing trend in food safety is the implementation of High-Resolution Accurate Mass (HR/AM) spectrometry for non-
targeted screening. Data from analysis performed on the Thermo Scientific Q Exactive benchtop HR/AM LC-MS/MS with Orbitrap™ technology will be presented.
Using High-Resolution Accurate Mass LC-MS/MS, multi-residue pesticide analysis of over 500 compounds can be successfully achieved within 12 minutes with a
detection limit of approximately 1 ppb and mass accuracy of less than 1 ppm. This revolutionary technology is unique and offers unprecedented ability to screen for
unknowns, thereby helping keep the food chain safer.
James Chang(1), Jessica Wang(1), Jennifer Sutton(1), Paul Yang(2), Michael Athanas(3)
(1) Thermo Fisher Scientific, San Jose, CA
(2) Ministry of Environment, Toronto, Canada
(3) VAST Scientific, Cambridge, MA
- Elizabeth Crawford, Brian Musselman, IonSense, Inc., Saugus, MA
Strategies for rapid screening and quantitation of pesticides by Direct Analysis in Real Time (DART) ambient ionization mass spectrometry
Routine pesticide and fungicide use in the United States, as well as abroad warrants the need for analytical techniques that can rapidly screen and quantify residues in
order to efficiently monitor produce products before reaching the consumer market. The allowable residue levels of chemical residues including pesticides and
fungicides on produce are governed by the US EPA Code of Federal Regulations that sets tolerance levels based on the commodity. Of particular
interest in the United States, carbendazim was found in imported orange juice from Brazil, where the use of that fungicide is legal and therefore rapid screening of
commodities would increase consumer safety in the US and worldwide. The Direct Analysis in Real Time (DART) ambient ionization technique offers the ability to
rapidly screen the surface of produce for pesticides by a direct swabbing method and permits direct analysis of fruit juices in seconds. With automated sample
introduction rapid screening and quantitative measurements can be completed using DART ionization coupled to high resolution accurate mass and triple quadrupole
Elizabeth Crawford, Brian Musselman, IonSense, Inc., 999 Broadway, Suite 404, Saugus, MA 01906
- Scott Kragerud, Field Applications Specialist, ABSciex.
Title: Innovations in UHPLC and MS/MS Technology for Identification and Quantitation of Food Contaminants
Description: New advances in the ABSciex line of mass spectrometers and Eksigent liquid chromatography products will facilitate the qualitative and quantitative analysis
of food products. This talk will discuss new advances-in and applications-of ABSciex hardware, software, and liquid chromatography products towards detecting and
characterizing contaminants in food products.