MassDEP APH is the most confusing analytical method I have ever worked with—and the only one I've encountered that requires calculating calibration standards differently from actual client samples. I created a 14-minute animated tutorial explaining the Massachusetts DEP Air-Phase Petroleum Hydrocarbons (APH) Method. Although APH is based on EPA TO-15, its quantitation procedures are significantly different. The video covers: 🔬 Canister preparation, sampling and preconcentrat

Your GC/MS calculation method controls how compounds are identified, quantified, calibrated, and evaluated. In this video, I walk through the key calculation-method parameters in Agilent EnviroQuant and show what I review when setting up or checking a method. I cover: • Compound identification settings • Internal standard assignments • Quantitation and qualifier ions • Retention-time parameters • Calibration levels and concentrations • Calibration curve and response-factor se

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 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

Pumping an Agilent 5977 GC/MS back down after maintenance is the moment you find out whether everything was put back together correctly. In this video, I show the pump-down process after the MS has been opened for maintenance. I go through: • Closing the analyzer and establishing the initial vacuum • Starting Pump Down in Vacuum Control • Watching the foreline pressure decrease • Monitoring the diffusion pump, source and quadrupole status • Confirming the system reaches READY

How to properly vent an Agilent 5977B GC/MS before performing mass spectrometer maintenance. In this hands-on video, I demonstrate the venting process and show what happens as the MSD prepares to come out of vacuum. Topics covered: • Preparing the GC/MS for venting • Opening Vacuum Control • Starting the vent cycle • Cooling the ion source and quadrupole • Monitoring temperatures during shutdown • Allowing the high-vacuum system to shut down correctly • Knowing when the MSD i

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