In recent years, food safety laboratories have adopted new and simplified sample preparation methods designed to reduce analysis time and related costs, as well as to increase throughput.  For example, the QuEChERS methods for fruits and vegetables require only minutes for sample preparation and replace prior methods that took hours or days.  This type of simplified analysis, with modification, has also been applied to fatty matrices such as nuts and oils.  In this presentation, we will discuss the determination of pesticides and related contaminants in oleoresins, the highly concentrated oily and resinous materials obtained from various spices.  Unlike many fatty samples, the oleoresins may completely dissolve in the acetonitrile used for QuEChERS type extraction.  Therefore, high amounts of matrix co-extractives will be present in the resulting extract and more rigorous cleanup is required compared with standard QuEChERS procedures for fatty matrices.  Alternative extraction and cleanup procedures for oleoresins are under investigation and will be presented and discussed.  Among the applications are pesticides and sudan dyes in chili and ginger oleoresins using tandem LC-MS and tandem GC-MS.  A new GC-MS technique using atmospheric pressure mass-spectrometry (APGC) will be compared with electron-impact mass-spectrometry (EI) for the tandem GC-MS analysis.

Determination of pesticide residues and related contaminants in spice oleoresins: Optimized sample preparation prior to LC-MS/MS and GC-MS/MS analysis

248th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.