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Stable Isotope Geochemistry

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Howie,

Cole Parmer has a really slick compact vacuum manometer (0-1400 mb) 
for about $900USD. It can be attached  to a line with UltraTorr 
fittings. It runs on a rechargeable battery so there are no cables 
hanging everywhere. We've had one for about 4 years with no troubles. 

Len

----------
From: 	Howie Spero[SMTP:[log in to unmask]]
Sent: 	Friday, March 21, 1997 5:59 PM
To: 	[log in to unmask]
Subject: 	reference material and manometer source question

To Whomever can help:


	I've got a couple of quick questions.

	First, can anyone tell me what the current accepted values are for
the NIST nitrogen isotope stds N2 and N3? If you have a reference, 
that
would really help.

	Second question. I am looking for a good digital manometer to
attach to a vacuum extraction line. We want to be able to calibrate 
the
manometer to calculate gas yields off samples. Can anyone recommend a
manufacturer and transducer/gauge assembly that has provided them with 
good
service through the years?
	Thanks for you help.

Howie Spero

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   *  Dr. Howard J. Spero	*		 			 *
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