Screening Medical Marijuana for Pesticides by GC-MS/MS
Di Wang, Laura Chambers, William Lipps, Zhuangzhi ‘Max’ Wang, Robert Clifford; Shimadzu Scientific Instruments, Columbia, MD, USA
Since medical marijuana (MM) was legalized in California in 1996, 23 states and Washington, D.C. have passed laws allowing its use for a variety of medical conditions. From a consumer safety point-of-view, quantitation of the pesticide residues in MM products has begun to attract wide interest. There are several problems associated with analysis of pesticide residues in MM. First and foremost, there are very few regulatory guidelines established to define which pesticides to include or what the detection limits should be, and secondly the matrix is very complex with significant interferences. Finally, sample load is growing exponentially, so the chosen method must be quick and easy to perform. Trace level pesticide analysis in complex food matrices have been done for many years with similar challenges, thus many of the analytical protocols emerging for the MM matrix are based on these well-established techniques.
Triple-quadrupole GC-MS/MS operated in MRM mode provides significant sensitivity and selectivity, but method development can be expensive and time consuming. This poster describes streamlined method development process for analysis of pesticide residues in MM using a QuEChERS sample preparation method, followed by GC-MS/MS detection and quantitation.
Fully automated sample preparation for the determination of plasticizers in PVC from food contact materials and toysPoster
The poster outlines a comprehensive, fully automated analysis of plasticizers in toys and food stuff.READ MORE
Analysis of Urine SRMs Using Solid-Phase Micro Extraction, Dynamic Headspace, and Liquid Injection with Comprehensive GCxGC High Res TOFMSPoster
We used modern-day, high-resolution time-of-flight mass spectrometry (HRT) and powerful processing software to quickly and confidently identify compounds in urine.READ MORE
Determination of the Fat Content Profile of different Chocolate Products using an Automated Workflow for the Generation of Fatty Acid Methyl Esters (FAME)Poster
The method allows for automated determination of total fat content and quantitative analysis of saturated and unsaturated cis- and trans- fatty acids of different chocolate products.READ MORE