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Gc troubleshooting guide GC TROUBLESHOOTING GUIDE www phenomenex com GC Access GC Resources Explore Online Tips Tools You asked for a better online experience One ?lled with technical resources easy-to- ?nd products and useful tools to make your GC work e

GC TROUBLESHOOTING GUIDE www phenomenex com GC Access GC Resources Explore Online Tips Tools You asked for a better online experience One ?lled with technical resources easy-to- ?nd products and useful tools to make your GC work easier Good news ? it ? s here ? Troubleshooting resources and on-demand webinars ? Get thousands of applications ?? save and access them anywhere ? Watch technical demonstrations and ??how-to ? videos ? Create a virtual stockroom for your lab ? Try tools that make selecting the right product easier than ever ? Get FREE samples and special o ?ers www phenomenex com ResourcesGC GC Troubleshooting Guide INDEX BEFORE YOU START PEAK SHAPE PROBLEMS COLUMN SELECTION PROBLEMS PROBLEM PREVENTION COLUMN CARE USE Baseline Problems Bleed Drift Noise O ?set Spiking Wander Waves Reduced Size Clipped Flat Fronting Ghost Peaks Irreproducibility Negative Peaks No Peaks Peaks Added Sensitivity Loss Split Peaks Tailing Retention Time Shifts Solvent Peak Broad Resolution Loss Performance Loss Selectivity Dimension Selection Phase Selection Chart Cross-Reference Chart Injection Techniques Maintenance Schedule Inlet Maintenance Detector Maintenance Column Installation Column Conditioning System Conditioning ? Phenomenex Inc All rights reserved BEFORE YOU START Goals Approaches An important ?rst step in troubleshooting is understanding the problem This is best approached systematically once you have a good understanding of what is causing the problem it will be easier to implement a logical solution Understanding the problem can also allow you to alter analysis or maintenance habits to avoid the problem in the future Prevention is usually the most cost e ?ective solution Common Troubleshooting Approaches Change Everything Make An Educated Guess Eliminate Problems Systematically Changing everything relating to the problem may allow a remedy but won ? t allow you to fully understand the solution In the long run this may be more costly than other approaches Narrowing down or eliminating parts of the process may give a good starting point to determine the cause of the problem but does not necessarily allow you to solve or prevent the problem in the future A systematic approach includes checking the chromatographic system from one end to the other isolating the problem learning what went wrong solving the problem and then preventing it This is the recommended approach Problem Prevention Many GC problems can be prevented if the column and system are maintained routinely Problem Prevention see p outlines maintenance practices that will reduce the frequency of common issues These suggestions should be modi ?ed to ?t your GC column and instrument and then made a regular part of your laboratory routine Troubleshooting Tools What To Have On Hand Have your instrument manual and these diagnostic tools at hand ? Flow meter with a range of to mL minute ? New syringes ? Non-retained detectable compound such as methane or propane ? Septa ferrules inlet liners and other consumables ? Electronic leak detector ? Reference sample ? Reference column with known performance l Phenomenex WEB www phenomenex com BEFORE YOU START Tips For E ?ective Troubleshooting ?