Life of an insert depends greatly on the type samples run and their
size/weight. For glass filters the life is usually around 20-25 filters,
For sediments >20mg - ~100 samples
Sediments <20mg - 150 to 200 samples.


Brian Jones

Research Assistant

Dept. of Oceanography

Texas A&M University

College Station Tx. 77843

(979) 845-8916


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf
Of River He
Sent: Sunday, September 26, 2004 4:47 PM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] EA insert tubes

Hello All,

I'd like to know nromally how many samples you guys
analyse before changing a new quartz insert. Thanks,
River He

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