Search found 4 matches

by Mad Hatter
Wed Dec 09, 2015 6:32 pm
Forum: General
Topic: EPA PAMS Re-engineering
Replies: 5
Views: 26384

Re: EPA PAMS Re-engineering

Has anyone used teflon lines? I think RTI started with SS and had problems and went to 1/4" teflon and it was working.
by Mad Hatter
Wed Dec 09, 2015 6:14 pm
Forum: General
Topic: EPA PAMS Re-engineering
Replies: 5
Views: 26384

EPA PAMS Re-engineering

The EPA started a project to re-engineer the PAMS Network back in 2011.  The initial stages included a review by the Clean Air Scientific Advisory Committee (CASAC) Air Monitoring and Methods Subcommittee (AMMS) of the current PAMS program and resulted in additional presentations at the NACA Monitor...
by Mad Hatter
Tue Dec 08, 2015 10:07 pm
Forum: Chromatography
Topic: Lost Peaks
Replies: 2
Views: 11892

Re: Lost Peaks

I agree with Red. Do you run blanks after your PAMS sample? Sometimes this can give more information. We have seen the heavies disappear in the QC sample and show up in the blank after it. This has been a problem with steel sample lines or sometimes if graphite ferrules come apart.
by Mad Hatter
Tue Dec 08, 2015 9:34 pm
Forum: Chromatography
Topic: Problems with retention times on my BP column
Replies: 1
Views: 9491

Problems with retention times on my BP column

I understand the issues with retention time instability on PLOT columns but my retention times on the BP column seem to vary a lot. This causes a lot of identification problems because some of the separations are not baseline separations. Does anyone else see this or know what might be causing it?