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March 2014 Food Testing GC Productivity Metabolomics Materials Testing Volatile Profiling of U.S. Cabernet Sauvignon Wines Using HS–SPME and the Agilent 5975 Series GC/MSD System: Relating the Chemical Profile to Sensory Properties Anna K. Hjelmeland, Ellena S. King, Susan E. Ebeler, and Hildegarde Heymann, Agilent Technologies A semi-quantitative, automated headspace solid phase microextraction (HS–SPME) gas chromatography–mass spectrometry (GC–MS) method has been developed on the Agilent 5975 Series GC/MSD system using synchronous selected ion monitoring (SIM)/scan detection to measure 61 volatile compounds in wine. Read More Using Analyte Protectants and Solvent Selection to Maximize the Stability of Organophosphorus Pesticides During GC–MS Analysis Eduardo Morales and Anthony Macherone, Agilent Technologies Several solvents and analyte protectants were evaluated for their ability to stabilize and maximize the recoveries of a number of organophosphorus pesticide residues during GC–MS analysis. Hexane provided the best analyte stability for a wide range of pesticides, and d-sorbitol offered the most benefit to recovery as an analyte protectant. Read More Using HS–SPME and GC Triple Quadrupole MS for High Throughput Analysis of Haloanisoles in Wines Philip Wylie and Anna Hjelmeland, Haloanisole contamination causes cork taint, a musty off-aroma, in affected wines. Cork taint results in significant economic loss for the wine and allied industries every year. Read More Chemometric Profiling of Whiskey Using the 5977A GC/MSD Takeshi Serino and Brian Hom, Agilent Technologies Nontargeted compound analysis and statistical tools were used in combination with the high sensitivity of the Agilent 5977A Series GC/MSD with Extractor EI Source to generate compound profiles that were used to differentiate five brands of whiskey. Read More Screening Foodstuffs for Pesticides and Other Organic Chemical Contaminants Using Full Scan GC–MS and MassHunter Quant Target Deconvolution Chris Sandy, Agilent Technologies This application note demonstrates the use of the Target Deconvolution (TD) feature of Agilent’s MassHunter Quantitative software for the targeted identification of pesticides and other organic contaminants. Read More Impact of Air Leaks on the Productivity of GC and GC–MS Systems Ken Lynam, Agilent Technologies Column bleed, retention time drift, endrin/DDT breakdown, background noise, and electron multiplier voltages were monitored with and without oxygen in the carrier gas. Detrimental effects of oxygen in the carrier gas were observed almost immediately and persisted on both systems. Read More Proof of Long–Term, Leak Free Performance for a Novel Self–Tightening GC Column Nut Ken Lynam, Agilent Technologies Specially designed self-tightening inlet and transfer line column nuts maintain a leak-free seal over more than 300 injections. Read More Metabolomics of Carbon-Fixing Mutants of Cyanobacteria by GC/Q–TOF Dong Hee Chung and Sofia Aronova, Agilent Technologies Mutants of model cyanobacteria were evaluated by untargeted metabolomics to identify possible phenotypic changes that allow more efficient growth using an Agilent 7200 series GC/Q-TOF. Read More Phthalates Analysis in Toys Using Agilent’s 5977E GC–MS Suli Zhao Ming Yan, Agilent Technologies Demonstrating the GC/MSD performance and cost-efficiency for testing six regulated phthalates in children’s toys. Read More   Go to Application Note Library Subscribe to the Application Note Alert LCE Print Edition LCE Digital Edition