Fast and Efficient Analysis of Polynuclear Aromatic Hydrocarbons in Edible Oils Using Dual-Layer SPE
Poster Oct 29, 2014
Christine Dumas and Katherine Stenerson
Polynuclear aromatic hydrocarbons (PAHs) can contaminate edible oils through environmental exposure and processes used in the production of the oil itself. Analysis of these lipophilic compounds in oily samples usually incorporates extraction techniques such as column chromatography using normal phase sorbents, and liquid-liquid extraction (LLE) followed by solid phase extraction (SPE) or GPC. In this work, a simple and direct SPE approach using a dual-layer cartridge is presented for the extraction of PAHs
from edible oil samples. Sample was applied directly to the cartridge without dilution, and acetonitrile was used to elute the PAHs, with fatty matrix retained by the sorbent beds. Samples of canola and soybean oils spiked with a mixture of PAHs from 2 to 6 rings were analyzed in triplicate by both HPLC
with fluorimetric detection and GC/MS in selected ion mode. Recoveries of the PAHs and reproducibilities of the spiked replicates will be reported, as well as a comparison of data obtained for the two analytical techniques.
Overcoming the Challenges of Analysing Ionic Polar Pesticides in FoodPoster
Here, the novel application of the Waters’ Torus DEA column is presented, showing the improved performance of a UPLC-MS/MS method for the underivatised
analysis of glyphosate and a selection of other anionic pesticides.
A New Tool for the Automated Sample Preparation of Whole Blood Samples by LC-MS using a Commercial AutosamplerPoster
Automated sample preparation reduces the costs per sample and minimizes sample handling errors. Usually expensive and highly specialized pipetting robots are used. However, most of these systems are not designed with a direct interface for LC-MS applications. In addition common pipetting systems are not optimized for smaller scale sample series. Here we present a new tool for liquid handling of whole blood samples and direct sample injection.READ MORE
Multi-Residue Pesticide Analysis in Food Matrices Using Ultivo Triple Quad LC/MSPoster
Regulatory agencies have set maximum residue levels for hundreds of pesticides and their metabolites in foods.READ MORE