Date: Mon, 1 May 2006 09:49:44 -0700 (PDT) From: Suzanne Nicole Osborne To: peterds@u.washington.edu Subject: Re: isotope data HCDOP (fwd) Here you go... ---------- Forwarded message ---------- Date: Fri, 24 Jun 2005 08:16:35 -0700 From: David Harris To: Suzanne Nicole Osborne Subject: Re: isotope data HCDOP Suzanne, The 4 data columns represent the total amounts of N and C in micrograms (all isotopic forms combined)and the isotope ratios in delta notation. The 'delta air' column represents the isotope ratio 15N/14N with respect to that of atmospheric N2 (defined as delta 15N = 0, 15N/14N = 0.0036765) The delta PDB column represents 13C/12C with respect to the standard Peedee belemnite (defined as delta 13C= 0, 13C/12C = 0.0112372) Delta 15N air = 1000(((15N/14N sample)/(15N/14N standard))-1) Delta 13C PDB = 1000(((13C/12C sample)/(13C/12C standard))-1) At 01:06 PM 6/23/2005 -0700, you wrote: > I just want to verify what data I received. Was it Total Particulate Organic > Carbon and Nitrogen, as opposed to exclusively Carbon 14 or Nitrogen 15. I > could not tell from the spreadsheet even though I thought that I had requested > a dual isotope analysis. > > Please get back to me ASAP because I can't moved forward until I know exactly > what I am getting. > > Thanks for your time, > Suzanne Osborne > > > On Thu, 2 Jun 2005, David Harris wrote: > > > Suzanne, > > Here are the data from your filter samples > > > > David Harris > > UC Davis Stable Isotope Facility > > Department of Agronomy > > 3112 Plant & Environmental Sciences Bldg. > > Davis, CA 95616 > > http://stableisotopefacility.ucdavis.edu > > phone 530 754 7517 > > fax 530 752 4361 David Harris UC Davis Stable Isotope Facility Department of Agronomy 3112 Plant & Environmental Sciences Bldg. Davis, CA 95616 http://stableisotopefacility.ucdavis.edu phone 530 754 7517 fax 530 752 4361