Analysis of Semi Volatiles Method by GC/MS/MS with Liquid-liquid Extractions Using ePrep Full Automation for EPA 3511Automation & Innovation for Sample Preparation
Oral Presentation
Prepared by A. Willey1, A. Minett2, B. Van Middlesworth3
1 - Agilent Technologies, 2850 Centerville Road, Wilmington, DE, 19808, United States
2 - ePrep Pty Ltd, 3 Kingston Town Close, Oakleigh, VID, 3166, Australia
3 - ePrep Pty Ltd, , CA, United States
Contact Information: [email protected]; 856-269-6739
ABSTRACT
Historically environmental labs are using large volumes of sample for liquid-liquid extraction to achieve acceptable detection limits for Semi-Volatile analysis. This is normally done with manual preparation, which can be very time consuming and uses an excessive amount of consumables and solvents. With the use of the ePrep Automated Liquid-Liquid Extraction (ALLEx), preparation can now occur on this stand-alone benchtop system, using less then 50mL's of sample volume. The ALLEx takes the sample all the way through EPA 3511 prep from initial water sample down to the GC vial that is ready for injection. With lower sample volume, instrumentation on the back needs the sensitivity to achieve acceptable detection limits, therefore the 8890/7000E GC/MS/SM was utilized for this experiment. Calibration standards in the range of 0.5ppb to 1000ppb where also prepared using the ALLEx system, programmed to make precision dilutions using Dichloromethane. Water samples were analyzed and spiked at different levels across the calibration. The ALLEx shows acceptable RSD recoveries over replicates splkes and calibration levels within EPA 8270 guidelines.
