As part of our ongoing commitment to be your partner in chromatography, we have created this series of GC Troubleshooting videos. In this series, Daron Decker, an Agilent GC applications specialist, and Herb Brooks, an Agilent service engineer, will discuss common chromatographic problems, causes, and corresponding solutions they have encountered throughout their careers.
The GC Troubleshooting Series
||Ghost Peaks (26:24)|
You will learn the main sources of ghost peaks including sample and solvent, gas purity and a contaminated inlet. You will also learn the detailed steps to perform basic inlet maintenance, a vital process to ensure accurate GC performance.
||Baseline Disturbances (8:56)|
You will learn the causes and solutions for baseline disturbances, including inlet, column and detector contamination as well as septum degradation.
||Fronting Peaks (2:39)|
You will learn about the causes of fronting peaks including column overload, improper column installation, injection technique inconsistencies and reverse solvent effect.
||Tailing Peaks (11:40) |
You will learn the many sources of tailing peaks including column contamination, column blockage, column installation and solvent-phase polarity mismatch, among others.
||Split Peaks (3:28) |
You will learn the causes and solutions of split peaks including injection technique, column installation, mixed sample solvent and sample degradation in the injector.
||Retention Time Shifts (11:36) |
You will learn about the causes of retention time shifts including a leak in the injector, blockage in gas line and how to perform a leak check.
||Changes in Peak Size (6:38)|
You will learn about the causes of changes in peak size (either an increase or loss) including change in detector response, process issues, vial seal, sample backflash, column contamination and decomposition from inlet contamination.
||Loss of Resolution Over Time (5:00)|
You will learn about the causes of loss of resolution over time such as normal wear and tear of the column, column contamination, column temperature, carrier gas velocity, change in sample concentration and improper solvent effect.
||Creating a Maintenance Method (2:27)|
Establishing a maintenance method is a great way to prepare your GC for routine maintenance. In a few easy steps, you ll have the ideal system settings for your inlet maintenance.
||Replacing the Liner, Septum, and O-ring (3:49)|
Regular maintenance of your GC inlet will help you avoid chromatographic issues, and reduce your stress. Learn how to replace your inlet liner, septum and o-ring on an Agilent 7890 GC.
||Replacing the Gold Seal (3:48)|
Regular maintenance of your GC inlet will help you avoid chromatographic issues, and reduce your stress. Learn how to replace the gold seal in an Agilent 7890 GC.
||GC Column Installation Video (16:50)|
Proper column installation is one of the key items you ll need to know to get good performance from your gas chromatograph. Watch and learn about the steps to installing and conditioning a GC column.
||Change the Split Vent Trap (4:41)|
Learn how to replace the split vent trap.
||Leak Check for GC (3:54)|
Learn how to perform a manual leak check.