242nd ACS National Meeting, Denver, CO
C&EN Technical Program Summary
Monday early evening 8/29/11 before SCI-MIX: Calling all ACS Twitter peeps using and/or following the #acsdenver conversation on Twitter
Meet me at LODO's Downtown at 5:30pm-7pm.
An official IYC event
RSVP using the Schmap Please RT and spread the word.
After the Tweetup, take the 6 minute walk to SCI-MIX at the Colorado Convention Center.
Monday evening 8/29/11 8:00pm–10:00 p.m.
Sci Mix
Colorado Convention Center Hall D
Sci Mix
Colorado Convention Center Hall D
"Sci-Mix is the largest poster session of the national meeting. Successful student chapters will showcase their activities and the event will also feature divisional posters and other exhibits" Source
I'll be at SCI-MIX at my SCHB: Division of Small Chemical Businesses poster #SCHB015: Document ID: 18472
Program Area: SCHB: Division of Small Chemical Businesses
Symposium Title: (SCHB015) Sci-Mix
My colleague will be at my ENVR : Division of Environmental Chemistry poster #ENVR023: Chemistry outreach on Cape Cod during the International Year of Chemistry
Wednesday evening 8/31/11 ENVR: Division of Environmental Chemistry General Poster Session #ENVR008p: Chemistry outreach on Cape Cod during the International Year of Chemistry
Program Area: ENVR: Division of Environmental Chemistry
Symposium Title: (ENVR023) Sci-Mix
Tuesday morning 8/30/11 and Wednesday morning 8/31/11 9am-12pm-See me on the EXPO Floor-Stop by the SCHB booth #1730-I'll be there from 10am-1pm. Come and learn about the SCHB: whose objective is to aid in the formation, development, and growth of small chemical businesses.
and James T. Grady-James H. Stack Awards Reception/SE-21/$10 4:30 to 6 PM, Colorado Convention Center RM 605
Posters, ChemLuminary Awards and Dancing Chemists...come and celebrate the International Year of Chemistry at the Fall National Meeting. 8pm Sheraton Denver Downtown.
Tuesday morning 8/30/11 and Wednesday morning 8/31/11 9am-12pm-See me on the EXPO Floor-Stop by the SCHB booth #1730-I'll be there from 10am-1pm. Come and learn about the SCHB: whose objective is to aid in the formation, development, and growth of small chemical businesses. Here is the SCHB Fall newsletter including Denver program overview and specific SCHB symposia.
Tuesday afternoon 8/30/11 Presidential Symposia & awards: Communicating Chemistry to the Public symposium moderated by ACS President-Elect Bassam Shakhashiri (co-sponsored by ACS President Nancy B. Jackson and the ACS Committee on Public Relations and Communications) on Tuesday afternoon from 1:00 p.m. to 4:30 p.m. at the Colorado Convention Center, Room 108. Speakers include journalists from print, web, radio and television; a chemist-cookbook author; science toys expert; and the author of the 2012 National Science Board’s Science Indicators public opinion chapter.RSVP using the Schmap.
Tuesday evening 8/30/11. The fun begins at 8pm.
Posters, ChemLuminary Awards and Dancing Chemists...come and celebrate the International Year of Chemistry at the Fall National Meeting. 8pm Sheraton Denver Downtown.  |
| NESACS Celebrates #IYC2011 at the Q2 Cape Cod Science Cafe |
Document ID: 10095
Program Area: ENVR: Division of Environmental Chemistry
Symposium Title: (ENVR008p) General Posters
Looking forward to seeing you in Denver!
Still I wouldn't use a PID if I had more than one solvent as it would be extremely difficult to differentiate between them especially if one was a chlorinated hydrocarbon and the other was a non chlorinated solvent. A PID would be useful if you are doing a general survey to determine presence of solvents in an area were you already know qualitatively what exists in the matrix. But then an FID or an FPD would do the same job why use a PID ? A more difficult question is why would you want to do such a survey at all? I have used TO-17 or T0-15 for surveys for years and in my opinion the results much more accurate results albeit you have to wait for the laboratory analysis.
As I said in the beginning of this discussion if you must have immediate results I would use a portable GC-MS . Yes its heavier ,more expensive and difficult to use, but its also more accurate and the results coming from it definitely would stand up in court were as I sincerely doubt if results from a PID scanner would.
see http://www.epa.gov/ttnamti1/airtox.html#compendium for all the ambient methodology when you need to use a Mass spec otherwise http://www.osha.gov/dts/sltc/methods/organic/org007/org007.html or
http://www.cdc.gov/niosh/docs/2003-154/
Although we will never get one opinion in here ,maybe someone from NIOSH or OSHA is listening and could weigh in??
The main advantage of a PID is that it does respond to many compounds so one does not need a specific analyzer for every solvent that they use. The PID has a fast response (90% in 1 second) and can detect very low levels of VOC’s (ppb) so it can be used to find problem areas very quickly. Once an area is mapped, a charcoal tube sample is collected in the “hot” spots and returned to the laboratory for a detailed analysis of the chemicals in the area by various OSHA methods. In fact, the portable PID’s are used by OSHA to determine sampling locations during their surveys of industrial plants. With a PID to determine which problem areas to sample, one would have a more accurate assessment of the site.
I agree with you 100%.
The right tool in the right hand at the right time,
Thanks, this is the good kind of quality discussions we should have here.
Have a nice day
After living thirty years of Industrial Hygiene and Atmospheric Science you
must understand that I have heard many long tales of misuse of equipment
and then had to eat the dust myself. How many times have a heard people
trying to convince a Judge that they measured concentrations with whatever
handheld sensor and that a 3 second measurement was equivalent to a
measurement over 30 minute average period which was required by law???
This discussion started before I was born in 1955 with Leidel and Leidel
when people were trying to prove that you could simulate worker exposure by
setting up and number of sensors in a factory, measuring the time the
worker was in each area, integrating between time and exposure and hockus
pockus you get an exposure value which is supposed to represent reality.
Well in reality this method didn't work in 1955 and it doesn't work now
either.
Then again as you explained very clearly there are advantages to a
screening tool and it always comes down to the right tool in the right hand
at the right time.
Thanks for the opportunity to discuss a real hot potato and for handling it
in a very professional way.
Hope that we will have many more such discussions here.
Best Regards
Gershon Schwartz
sentex weighed over 20 kg and gave me a slipped disc. Then there was the
Photovav gc pid which wasn't very stable in the field. Does anybody know if
there are any portable gc's available today? Seems to me like another great
idea on paper that never worked in the field?
Best regards
Let me check what I can find for your blog.
If you need a good field instrument or something accurate but portable, I'd recommend the Miran SapphIRe - it uses infrared spectroscopy and the XL model has a comprehensive library that calibrates the unit to 150 compounds for unknown identifications and can be customized for whatever you are looking for. (Here's the spec sheet)
It's a whopper to carry around but very helpful in instances where we needed to know the actual concentrations (or as nearly as we could get). The Miran is cheaper than a portable GC-MS (costs around $25K to buy), but with all these detectors, you can rent them from folks like Ashtead or Geotech for a reasonable fee... Lastly, as Gershon mentioned above, TO-15 or TO-17 canister sampling can be done, and if you are in a hurry, there are mobile labs that can do these analyses on-site (such as H&P Mobile Geochemistry and Con-Test) using Tedlar bags and/or Summa canisters.