Clipping a GC column can shift retention times — but your GC/MS calculation method still contains the old values. In this video, I show how I update retention times in Agilent EnviroQuant after trimming a GC/MS capillary column. I walk through the actual software workflow: • Review the chromatogram after the column has been clipped • Check the new compound retention times • Load the appropriate quantitation/calculation method • Confirm compound identification • Open the calib

How to replace a capillary GC column in an Agilent GC/MS. In this hands-on video, I walk through capillary column installation from the inlet to the MSD transfer line. Topics covered: • Preparing the column for installation • Making a clean, square column cut • Installing the correct nut and ferrule • Setting the correct column insertion depth at the inlet • Installing the column into the MSD transfer line • Avoiding leaks and poor positioning • Checking the installation befo

How to replace a capillary GC column in an Agilent GC/MS. In this hands-on video, I walk through capillary column installation from the inlet to the MSD transfer line. Topics covered: • Preparing the column for installation • Making a clean, square column cut • Installing the correct nut and ferrule • Setting the correct column insertion depth at the inlet • Installing the column into the MSD transfer line • Avoiding leaks and poor positioning • Checking the installation befo

How to replace the copper split vent line on an Agilent 6890 GC split/splitless inlet. In this hands-on maintenance video, I show the process of replacing the split vent line, including: • Accessing the inlet plumbing • Disconnecting the old vent line • Removing the tubing • Routing the replacement line • Reconnecting the inlet • Reassembling the system The split vent line is easy to overlook during routine inlet maintenance because most of it is hidden inside the GC. Over ti

How to correctly trim or clip a capillary GC column before installation. In this hands-on video, I demonstrate how I prepare and cut the end of a capillary GC column to create a clean, square column end before installing it into the GC inlet. Topics covered: • Inspecting the column end • Using a ceramic scoring wafer / column cutter • Making a clean square cut • Avoiding crushed or angled column ends • Checking the cut before installation • Installing the trimmed column into

How to replace the inlet liner and O-ring in an Agilent 7890 split/splitless GC inlet. In this hands-on maintenance video, I show the complete process of accessing the inlet, removing the existing liner, installing a clean liner with the correct O-ring, and reassembling the inlet. Topics covered: • Removing the autosampler injector tower • Cooling and depressurizing the inlet • Removing the top insert assembly • Removing the old inlet liner • Installing the liner O-ring • Ins

How to replace the gold seal on an Agilent 7890 GC inlet. This video shows the hands-on process of removing the lower inlet hardware, replacing the gold seal, reassembling the inlet, and reinstalling the GC column. For trace-level GC/MS analysis, inlet contamination and active surfaces can contribute to poor response, peak tailing, discrimination, elevated background, and failing CCVs. Gold seal replacement is an important part of maintaining a clean and inert GC inlet flow p

In this hands-on video, I show how I replace the split/splitless inlet EPC pneumatic module on an Agilent 6890 GC. This repair involves going beyond routine inlet maintenance and accessing the internal pneumatic system of the gas chromatograph. In the video, I cover: • Opening the GC and accessing the EPC module • Disconnecting the pneumatic and electrical connections • Removing the old split/splitless inlet EPC module • Installing the replacement module • Reconnecting the sy

In this hands-on GC maintenance video, I show how I replace the top shell weldment on an Agilent 6890 split/splitless inlet. The top shell weldment is part of the inlet assembly and can require replacement when it becomes damaged, contaminated, or no longer performs reliably after repeated maintenance. In this video I cover: • Accessing the split/splitless inlet • Removing the existing top shell weldment • Disconnecting the associated inlet components • Installing the replace