Making Better Connections in GC and GC/MS Systems

This presentation will cover products from Agilent that make GC connections more robust by utilising new technologies that makes connections easier, leak free and more inert for any application.

Topics covered include: Self Tightening Stainless Column Nuts and ferrules, Press Fits, UltiMetal Plus and Stainless Steel Capillary Tubing, Ferrule Pre-swaging installation tool and MS interface installation tool, among others.

Mark Sinnott
Application Engineer
Agilent Technologies, Inc.

Mark Sinnott works for Agilent Technologies as a Technical Support Engineer in the Consumables and Supplies Division (CSD). In his position at Agilent, Mark performs technical support and applications assistance to gas chromatographers worldwide. He has more than 22 years of experience in gas chromatography, including environmental analysis of compounds in air, soil and water matrices, including dissolved gas analysis for the electrical industry. Mark holds a Master’s Degree in Chemistry from California State University, Sacramento, and currently resides in Twin Falls Idaho.


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Reliability of Multi-residue Identification

It is of utmost importance to ensure that the analytical results from residue testing for food products are reliable. “False positive” findings of hazardous residues in food result in safe product being rejected and leading to potential huge financial and juristic implications. “False negative” findings result in contaminated product being on the shelf and increase the risk of a foodborne disease. The reliability of testing results depends on the type of methodology and the performance criteria. Identification is the important step before a residue is reported. Procedures for identification should be rigorous and depend on sensitivity and selectivity of the MS techniques. The causes of “false positive” and “false negative” derived from both QqQ-MS and HR-MS detection will be discussed. The approaches of establishing a “fit-for-purpose” methodology and identification criteria for both QqQ-MS and HR-MS will be introduced. This will help the testing labs build the protocols/procedures to follow to reduce the incidence of “false detections”; help set up the criteria for identification; and help deliver the highly accurate results.


Hui Zhao
Pre-Sales Application Engineer
Agilent Technologies, Inc.


Hui has 13 years of industry experience developing and validating analytical methods for food/feed nutrition, food safety, dietary supplements and botanicals testing, using a variety of analytical techniques including LC-TQ, LC-QTOF, LC-DAD and GC-MS and a breadth of sample preparation methodologies. She has worked as a Research Scientist at Monsanto, EPL-Bioanalytical Services, Tate & Lyle, Inc. and Lead Staff Scientist at Covance Food Solutions. She holds a Master of Science degree in Analytical Chemistry from Lanzhou University in China and a Ph.D. in Analytical Chemistry from the University of Missouri.

Prior to becoming a Pre-Sales AE, Hui worked as an LCMS application scientist in Agilent’s global market development group where her primary focus was food and environmental market development.


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Gas Chromatography Mass Spectrometry

Chemetrix and Agilent have led innovation and performance in gas chromatography/mass spectrometry (GC/MS) for over 40 years, from the first benchtop GC/MS through to the MS/MS-capable high-resolution GC/Q-TOF. The Chemetrix GC/MS family of instruments and accessories provides the efficiency, flexibility, and robust performance that modern analytical laboratories require.


Concepts & Fundamentals

Learn about GC-MS principles, concepts and their main components, as well as best practices, Tips & Tricks.



Fundamentals of Mass Spectrometry Theory


GC/MS Fundamentals


Fundamentals of GC Columns


GC-MS Concenpts

Agilent GC- MSD Concepts Guide

Concepts Guide

Transferring GC/MSD Methods to a Triple Quadrupole GC/MS System

Technical Overview