None whatsoever; all it takes is patience plus copper wires (0.1mm dia) from Alfa Aesar (Puratronic 99.99+) and ceramic tubes.

Best,

Wolfram


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"Facts do not cease to exist because they are ignored."

Aldous Huxley, "Proper Studies", 1927
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Dr W Meier-Augenstein
Senior Lecturer in Stable Isotope Forensics

Environmental Forensics & Human Health Research Group
EERC, S.P.A.C.E.
Queen's University Belfast
David Keir Building
39-123 Stranmillis Road
Belfast, BT9 5AG
United Kingdom

Tel.: +44 (0)28 9097 4015
Fax: +44 (0)28 9066 3754
Email: [log in to unmask]
URL (Isotope Lab): http://www.qub.ac.uk/eerc/facilities/siff.htm
URL (Research):
http://www.qub.ac.uk/eerc/people/academic_staff/wma/wm_a/efnhh.htm

-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Todd Prior
Sent: 06 November 2007 21:02
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] Aging carbon furnace tube in GC-C-IRMS

Thanks Gerry,

Is it difficult to make these as you suggested??

Thanks again ..Todd