We have a new CE EA 1110 CHN and would like to incorporate a certified sediment standard into our calibrations. I have been unable to get a hold of NIST 2704 Buffalo River Sediment as it is back ordered at NIST until at least May. Does anyone know of any other certified sediment standard for measuring % carbon and nitrogen or have enough of NIST 2704 to be able to spare me some until I can replace it when my backorder arrives? Thanks, Margaret xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Margaret B. Lansing U.S. Dept. of Commerce National Oceanic & Atmospheric Administration Great Lakes Environmental Research Laboratory 2205 Commonwealth Blvd. Ann Arbor, MI 48105 [log in to unmask] 734-741-2289 (lab) 734-741-2210 (office) 734-741-2055 (fax) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx