MODIFICATION
66 -- Amendment to Combined Synopsis/Solicitation for EDXRF
- Notice Date
- 3/2/2011
- Notice Type
- Modification/Amendment
- Contracting Office
- Environmental Protection Agency, Administrative Contract Service Center, 1200 Pennsylvania Avenue, Nw, Washington, DC 20460
- ZIP Code
- 20460
- Solicitation Number
- RFQ-DC-11-00036
- Response Due
- 3/7/2011
- Archive Date
- 4/7/2011
- Point of Contact
- Point of Contact, Michael Gilham, Purchasing Agent, Phone (202) 564-6090
- E-Mail Address
-
U.S. Environmental Protection Agency
(GILHAM.MICHAEL@EPAMAIL.EPA.GOV)
- Small Business Set-Aside
- N/A
- Description
- NAICS Code: 334516 This RFQ is being amended to provide answers to vendor questions and to extend the response deadline to 3/8/11 at 4 pm Eastern Standard Time. Any futher technical questions must be received - at the e-mail address in the original posting - by 12pm EST on 3/3/11.Questions and answers are as follows: 1) For 24 sample minimum: can you give min and max dimensions? What about concentrations? Furthermore, will they be solids, liquids, powders or other? Will they be a combination? NEIC usually, although not always, has large sample amounts to work with. As for sample sizes presented to the instrument, most will fall in the 20 to 40 mm in diameter range. NEIC requires the capability to determine concentrations ranging from the lowest possible trace levels to 100%. It must analyze environmental samples as well as industrial waste materials, and this requirement means a wide range of concentrations will be encountered. NEIC require the ability to analyze liquids and powders in a helium atmosphere. It analyzes solids, pressed pellets, filters, and other materials under vacuum. Furthermore, NEIC receives samples of mixed phases, gels, emulsions, etc. that demand a flexible instrument and careful preparation. 2) Are you interested in mapping? NEIC is not interested in mapping for this instrument. 3) What is the lowest element of interest? Is it Sodium? Yes, sodium is the lowest element in the periodic table that NEIC needs to measure by XRF. NEIC requires the ability to measure most of the elements between sodium and uranium in the periodic table. This is at concentrations from trace levels to major amounts. 4) Any reason for polarized optical geometry? Has that been shown to be superior to others? It is well known that polarized X-ray optics reduce background and thus detection limits. This has been reported quite often in the scientific literature. For example "Background reduction in X-ray fluorescence spectra using polarization", by T.G. Dzubay, B.B. Jarrett and J.M. Jakievic, in Nuclear Instruments & Methods, Vol 115, Feb. 1974, pages 297-299.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/EPA/OAM/HQ/RFQ-DC-11-00036/listing.html)
- Record
- SN02391162-W 20110304/110302234213-822b3fe4f60f796455eae8709182fead (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's FBO Daily Index Page |