AOAC 133rd Annual Meeting - Final Program

Poster Abstracts | Wednesday

improving productivity, while the high capacity ion exchange columns can withstand higher sample loading enabling the analysis of lower concentrations of polar analytes in the more difficult, but relevant matrices, such as cereals and cereal products. Presenter: Ed George, Thermo Fisher Scientific, San Jose, CA, USA, Email: ed.george@thermofisher.com P-W-056 Brittany Laramee , Frederick Li , Brian Musselman , IonSense, Inc., Saugus, MA, USA; Taylor Feraco , NeXeP, Inc., Saugus, MA, USA DART-MS Analysis of Craft Beer for Pesticide and Herbicide Detection The main agricultural ingredients used in the brewing of beer, such as barley and hops, are often treated with pesticides and herbicides to reach good yields and reduce the losses during storage by protecting the plants from insects, pests, and weeds. Glyphosate is a known carcinogen that has been recently found in 14 beers, which included beers from major commercial brands. These pesticides and herbicides can persist in the plants during the entire brewing process and could be carried over to the beer from these raw plant materials. Therefore, it’s important to be able to detect these pesticide and herbicide residues in the finished beers. We describe here a method that employs Direct Analysis in Real-Time combined with mass spectrometry (DART-MS) for detecting pesticides and herbicides in beer. Craft beers are spiked with various concentrations of glyphosate and other pesticides to simulate finished beer containing pesticides, and are analyzed by DART-MS. Limit of detection is determined for each pesticide, and chemometric models are created to deter- mine beers that contain trace amounts of pesticides. These beers containing pesticides are then searched against our DART-MS library database to identify the specific pesticides. This method can be used to monitor pesticides in finished beer products. Presenter: Brittany Laramee, IonSense, Inc., Saugus, MA, USA, Email: laramee@ionsense.com P-W-057 Anthony Fontana , Mark Kotani , Preston Wong , ALS Group USA, Corp., Irvine, CA, USA; Joe Konschnik , Restek Corp., Bellefonte, PA, USA Residual Solvent Method for Colors from Natural Sources Colors from natural sources have been used for centuries to color foods to enhance the appearance and appeal of foods.

Natural colors are exempt from certification by the FDA and a number of regulatory bodies throughout the world. These colors include pigments derived from natural sources such as vege- tables, minerals or animals. For stability, reproducibility, and ease-of-use these color pigments are often provided in highly purified form. Production of these highly concentrated natural pigments often requires use of solvents and traces of these may remain in the finished colorant. Concentrated natural colors that contain unapproved solvents or excessive amounts of allowed solvents are considered adulterated and may pose health concerns. Sensitive, selective and robust methods are needed for the analysis of residual solvents in a wide range of natural colors to ensure quality and safety. Existing compendial methods for residual solvent analysis use headspace gas chromatography with flame ionization detection (HS-GC/FID) but these vary in format according to solvent mix and color matrix and may fail to identify the presence of unapproved solvents. Described is a method using headspace gas chromatography mass spec- troscopy (HS-GC/MS) for both authorized and unauthorized solvents for colors from natural sources. Presenter: Anthony Fontana, ALS Group USA, Corp., Irvine, CA, USA, Email: anthony.fontana@alsglobal.com P-W-058 Guofang Pang , Chinese Academy of Inspection and Quarantine, Beijing, China Rapid Screening for 1138 Pesticide and Chemical Contaminants Residues in Fruits and Vegetables by Accurate-Mass GC-QTOF/MS and LC-QTOF/MS: Call for Laboratories for Participation of AOAC Collaborative Study This study deals with the evaluation of the mass spectrometric characteristics of 1138 pesticide and chemical contaminants using GC-Q-TOF/MS and LC-Q-TOF/MS by combing with the respective customized accurate mass database and collision-induced-dissociation (CID) accurate mass spectral library for GC-Q-TOF/MS (500+ pesticides and 200+ PCBs) and LC-Q-TOF/MS (500+ pesticides). The developed rapid screening method allows simultaneous determination of 1138 pesticide and chemical contaminants with a single pre-treat- ment of samples. GC-Q-TOF/MS combined with LC-Q-TOF/ MS have been used to conduct screening of target compounds in more than 40000 fruits and vegetable samples from 638 sampling points of 31 provinces and cities of China. We propose to organize a multi-laboratory for AOAC collaborative study to evaluate the reproducibility of the single laboratory validated analytical method for the confirmation and determination of

100 SEPTEMBER 6–12, 2019 SHERATON DENVER DOWNTOWN HOTEL