Search found 17 matches

by Red Queen
Wed Jul 12, 2017 11:23 pm
Forum: Data Systems
Topic: Data Files
Replies: 3
Views: 17387

Re: Data Files

Hi Cat! I had the same problem and emailed the folks at AirNow. I got a response from Justin Dumas at Sonoma Technology (the folks who actually manage AirNow) and this is what he said. The TX0 files can be a little tricky, as their file names have to be in a particular format. For the paired files w...
by Red Queen
Mon Jul 10, 2017 12:35 am
Forum: Chromatography
Topic: Pinenes
Replies: 5
Views: 19941

Re: Pinenes

We are participating in a field demonstration of the Markes UnityXR with a Kori at the South Coast AQMD Rubidoux site for a month. We have preliminary chromatographic results but the retention times for the pinenes are not exactly what has been reported. Initially we were using the Markes T17 trap w...
by Red Queen
Mon Jul 10, 2017 12:30 am
Forum: Chromatography
Topic: Pinenes
Replies: 5
Views: 19941

Re: Pinenes

We are participating in a field demonstration of the Markes UnityXR with a Kori at the South Coast AQMD Rubidoux site for a month. We have preliminary chromatographic results but the retention times for the pinenes are not exactly what has been reported. Initially we were using the Markes T17 trap w...
by Red Queen
Sat Jul 01, 2017 4:15 pm
Forum: General
Topic: Webinars and other Resources
Replies: 1
Views: 9036

Re: Webinars and other Resources

AutoGC Data Collected by TCEQ in Texas The TCEQ has been using PerkinElmer Ozone Precursor Systems to collect hourly VOC data in Texas for 20 years and currently has 34 systems operating year round. This data is posted to their website hourly. Hourly data includes 46 target VOCs. Of the current new...
by Red Queen
Wed Jun 28, 2017 10:41 pm
Forum: General
Topic: Webinars and other Resources
Replies: 1
Views: 9036

Webinars and other Resources

Wanted to setup a place for general information and resources that we could share. If you find anything you think others might benefit from this would be the place. I will start by posting a link to a Webinar I did about a year ago for Separation Science that is available as an On-Demand eSeminar. A...
by Red Queen
Mon Jun 12, 2017 5:15 pm
Forum: General
Topic: EPA PAMS Re-engineering
Replies: 5
Views: 14223

Re: EPA PAMS Re-engineering

Field study results are now available on the EPA site:

https://www3.epa.gov/ttnamti1/pamsreeng.html
by Red Queen
Mon Jun 12, 2017 5:12 pm
Forum: General
Topic: PAMSGRAM
Replies: 0
Views: 15680

PAMSGRAM

Back in 1996 when the first PAMS automated systems were deployed, the EPA published a series of technical documents on many topics and issues associated with the hourly sampling and analysis for agencies required to do PAMS monitoring. These old documents still have some valuable information and are...
by Red Queen
Sat Jun 03, 2017 1:27 pm
Forum: Chromatography
Topic: Pinenes
Replies: 5
Views: 19941

Re: Pinenes

We have done some more work on trying to identify the pinenes in the new PAMS standard. After determining by TOFMS that they were indeed in the canister, we collected the new standard on our Markes system at 30°C without the Nafion® drier in line and got some interesting results. The peak after 1,2,...
by Red Queen
Wed May 31, 2017 4:07 pm
Forum: Chromatography
Topic: Pinenes
Replies: 5
Views: 19941

Re: Pinenes

Well, got the results from the TOF analysis and both a and b-pinene are indeed in the can. The analysis was done on a 624 Column so the retention times won't match but a-pinene came out near isopropylbenzene and b-pinene between 1,3,5 trimethylbenzene and one of the ethyltoluenes. Pretty good sensit...
by Red Queen
Tue May 30, 2017 2:23 pm
Forum: Chromatography
Topic: Pinenes
Replies: 5
Views: 19941

Re: Pinenes

I have run a canister on both the Markes system and the PerkinElmer and I can only see one peak which is not fully resolved after 1,2,3-trimethylbenzene. When I calculate recoveries from theoretical values from ERG I get good results with the exception of m-ethyltoluene which is at 120% which makes ...