There were 16 shipboard duplicates collected and analyzed for d13C.  The pooled estimate of˙measurement precision˙from these is +- 0.027 per mille.

flag = 11 is a replicate sample used to compute the 'average of replicates' (flag=6) reported to CCHDO.  

contacts:  Rolf Sonnerup, University of Washington rolf@uw.edu
         Roberta Hansman, National Ocean Sciences AMS facility, rhansman@whoi,edu
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