The Agilent 8860 GC with the Agilent 5977B GC/MSD system was used for the screening of pesticides in strawberries. This cost-effective system, combined with appropriate sample preparation, operating conditions, and software tools, provides a useful way to identify pesticides and other contaminants in complex matrices such as foods. The instrument configuration incorporated pulsed splitless injection, a stainless steel EI source, and retention time locking to a database of pesticides and environmental pollutants. Complete analysis was done in two steps. Samples were first screened using Agilent MassHunter Unknowns Analysis software, which provides automated deconvolution and library searching to identify any pesticides or other chemicals of concern. Based on the screening results, the sample was then analyzed to quantify any compounds of interest that were found. Samples of strawberries, purchased from local grocery stores, were used to demonstrate the capabilities of the method.
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