Thanks, everyone, for your quick responses.

The consensus is that my reduction reactor is probably broken. I'm 
cooling things down and getting ready to inspect it.

I know the autosampler was working, because I watched it go and samples drop.

I'll be back if that doesn't fix the problem.

Thanks again,


                       Dr. Pennilyn Higgins
                        Research Associate

   Stable Isotope Ratios in the Environment Analytical Laboratory

         Department of Earth and Environmental Sciences
         University of Rochester
         227 Hutchison Hall
         Rochester, NY 14627

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Office: 209b Hutchison Hall               Lab: 209 Hutchison Hall
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