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February 2014 Environmental Food & Beverage Fuels Technical Resources Single–Run Analysis of PBDEs Including BDE–209 Kory Kelly, Kristen Parnell, and Kali Tudela A new HRGC–HRMS method and technology that provides quantitation of toxic PBDE congeners with short run times and includes the quantitation of BDE-209 in a single analytical run. Read More Improved Inertness and Detection for Semi-Volatiles Methods Kory Kelly, Kristen Parnell, and Kali Tudela This study explores the inertness of leading GC columns used for semi-volatiles testing and presents the advantages afforded by using columns designed and QC tested specifically for response and peak shape of active compounds. Read More Analyzing EPA 8270D with Application-Specific GC Columns Kory Kelly A GC–MS method analyzing base/neutral/acids (BNAs) is presented using the Zebron™ ZB-SemiVolatiles GC column. Specific attention is paid to the behavior of typically poor performing compounds like pyridine and PCP. Read More Leveraging High-Temperature Gas Chromatography for DRO Analysis Kory Kelly and Kali Tudela Considerations should be taken to ensure reproducible results over repeated injections of heavy compounds. This technical note discusses advantages of using a GC column stable to 430°C when analyzing DROs. Read More LC–MS–MS and GC–MS Analysis of Triazine Herbicides Kory Kelly and Kali Tudela Two methods are presented for triazine herbicides analysis in drinking water (EPA Method 536) and wastewater (EPA Method 619) exhibiting resolution and sensitivity improvements as well as time savings. Read More Reproducible, Aqueous–Stable Separations for Distilled Spirit Analysis Sky Countryman and Kory Kelly Distilled spirit analysis with traditional PEG phases presents challenges that can result in poor reproducibility and decreased lifetime. Improved stability to repeated aqueous injections is presented with an optimized WAX phase. Read More Optimized Multi–Residue Pesticide Screening by GC–MS Sky Countryman and Kory Kelly An optimized GC–MS method for multi-residue pesticide screening is presented. Application-specific selectivity is explored, displaying increased resolution of critical compounds versus standard 5 ms type phases. Read More Improved High-Temp SimDist with Metal GC Columns Kory Kelly, Sky Countryman, Chris Fernandez, and Ngoc Nguyen This method presents improved efficiency and resolution for simulated distillation testing, such as ASTM methods D6352 and D7169. Range is also extended from C100 to C120 while still meeting all system suitability requirements. Read More Attaining Sharper Peak Shape and Higher Sensitivity in GC Matthew Trass and Sky Countryman This guide presents two simple optimizations GC analysts can perform to more easily meet method detection limits (MDL) requirements. Solvent focusing and proper GC column selection are discussed. Read More GC Troubleshooting Tips & Tricks Phenomenex GC troubleshooting and preventative maintenance are leading causes of lab downtime. Learn helpful tips and tricks to quickly isolate and solve troubleshooting problems with this guide. Read More   Go to Application Note Library Subscribe to the Application Note Alert LCE Print Edition LCE Digital Edition