Document gDagROd5yZypx1eEk3jQ26dXL

2 . 4 5 R C V t a -79 mm> tJTil.iSKEO'BO; E 1. d u P o n t d e N em o u r s & C o m p a n y IN C O R P O R A T E D W il m in g t o n . D e l a w a r e 19898 POLYMER PRODUCTS DEPARTMENT EXPERIMENTAL STATION PERSONAL AND CONFIDENTIAL cc: A. J. Dahl B. W. Karrh L. J. Papa Pral File l.C. - 353 - Mil 400 - 269 - 4 / 2 . 2 . & - / 5 2 - July 28, 1981 DR. U. J. REINHARD F&F FAIRFIELD, CT. ANALYSIS OF BLOOD SAMPLES FOR PERFLUOROOCTANOATE (Job No. 811-595; PRAL No. 81-2957; Notebook Nos. E22514,E26238) As requested in your letter of 7/20/81 to L. J. Papa, the blood sample listed below has been analyzed for perfluorooctanoate. Sample PRAL No. 81-2957 Date Sampled 6/29/81 _____________________________ S.S . N o . Name GC Analysis Date Analyzed 7/ 14/81 [CR], t'g F/g bi 0.17 The analysis was done as for the samples reported to you previously (5/20/81), using a gas chromatographic method specific for Cg (Lab Method No. LS-567) but with the result given in ppm F for comparison with total organic fluorine analyses. Precision is + 10% relative standard deviation over most of the concentration range, somewhat less at the lowest values. The lower limit for quantitation is 0.007 ppm F (0.01 ppm perfluorooctanoic acid), with a detection limit of 't 0.004 ppm which can be distinguished from the reagent background but not well quantitated. Please contact me (772-4440) or L. J. Papa (772-2745) if you have any questions regarding the analyses. General questions on blood sampling can be directed to J. VC. Raines or L. F. Percival. jah Key Words: Perfluorooc tanoate Perfluorooctanoic acid Blood Analysis GC S. S. Stafford There * a w orld o ' th in o f wp re dom o som pthinc ahou! REDACTED* EXP000046 EID713860 000112