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Date: | Thu, 5 Aug 1999 07:54:24 -0400 |
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Isogeochemists:
I was having problems last night with Isogeochem recognizing my e-mail
address, which I hope are fixed now, so let me send the message about the
helium we use at the University at Albany that I wanted to send last night,
for Bill and others interested:
We use Air Products "Ultra-Pure Carrier Grade" He, which is supposed to be
99.9995% He (excluding Ne), with our Carlo Erba NA 1500 NC Series II EA and
Micromass Optima. This grade is between UHP at 99.999% and Research or
Chromatographic Grade which are both 99.9999%. Our price (through the
University's ChemStores, is about $72 for a 291 cf tank, about $20 more
than HP He (99.997%). The N2 and O2 appear to be quite low in comparison
with levels in UHP He. We have never felt the need to employ traps or
scrubbers. Maybe a good and cost-effective solution.
Steve
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Stephen S. Howe Office: (518) 442-5053
Dept. of Earth & Atmos. Sciences Stable Isotope Lab: (518) 442-4471
Earth Science 352B FAX: (518) 442-5825
University at Albany E-mail: [log in to unmask]
1400 Washington Avenue http://www.albany.edu/geosciences/sshowe.html
Albany, NY 12222-0001 http://www.albany.edu/geosciences/sirmslab.html
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