Document oeRZMgYMG40YY5Jrv65ZO9k4r

7 - 4 S BF V 1? ?V <fiOE]p> t v u n i,n fD isc; E. I . du Pont de N emours & C o m pany IN C O A P O R tT C C i W il m in g t o n . De law ar e 19898 PO LYM ER PRODUCTS DEPARTM ENT E X P E R IM E N T A L - S lA T lO N PERSONAL AND COXK1DLNTIAL 3 . W. Kar rii L . J . Pa pa Pral File 1 .C. ili X26I9]400 s 4 .Z Z - / 6 3 October 6, 1981 TO: DR. Y. L. POWER - FPL), Parkersburg FROM: S. S. STAFFORD ANALYSIS OF BLOOD SAMPLES FOR PERFLU0R00CTAN0ATE (Job Wo. 810-578; PRAL Nos. 81-4178-4214; Notebook Nos. E22514.E26238) As requested in your letter of 9/8/81 to L. J. Papa, the 37 blood samples submitted then have been analyzed for perfluorooctanoate (C,,) bv the o usual gas chromatographic method ES-567. Results and sample identification are given in the attached table. Attachment jah Key Words: Perfluorooctanoate GC Blood Analysis There s a w o rld ol th in g s w e re d o in g som ething about 000151 EXP000058 EID713872 TABLE 1 CONCENTRATION' OF PERFLUOROOCTAN0ATE IN BLOOD (a) Sample PRAL No. Date Sampled 81-4178 8/25/81 81-4179 8/25/81 81-4180 8/25/81 81-4181 8/25/61 81-4182 8/25/81 81-4183 8/26/81 81-4184 8/26/81 81-4185 8/26/81 81-4186 8/27/81 31-4187 8/27/81 81-4188 8/27/31 81-4189 8/27/81 81-4190 8/28/81 31-4191 8/28/81 81-4292 8/28/81 81-4193 8/28/81 81-4194 8/28/81 81-4195 8/28/81 81-4196 8/28/81 81-4197 8/31/81 81-4198 8/31/81 81-4199 8/31/81 81-4200 8/31/81 81-4201 9/1/81 81-4202 9/1/81 81-4203 9/1/81 81-4204 9/1/81 81-42Q5 9/2/81 81-4206 9/2/81 31-4207 9/2/81 81-4208 9/2/81 P.R.No. Name GC Analysis_________________ _(b) Date Analyzed [Cr ], Ug F/k blood 9/28/81 0.58 9/28/81 0.63 9/25/81 0.24 9/28/81 0.12 9/28/81 0.4] 9/21/81 4.0 9/28/81 0.51 10/2/81 1.1 9/25/81 0.065 9/29/81 0.81 9/25/81 0.34 9/25/81 0.036 10/2/81 0.027 9/25/81 0.30 9/29/81 0.41 9/28/81 0.57 9/29/81 0.04t, 9/28/81 0.65 '28 5. 9/30/81 0.24 9/21/81 1.7 9/29/81 0.10 9/29/81 0.059 9/29/81 0.32 9/2L/81 4.4 9/29/81 0.21 9/30/81 0.17 9/30/61 0.21 9/30/81 0.33 9/30/SI 0.17 9/21/81 1.4 9/30/81 0 . (> REDACTED* 000152 EXP000059 EID713873 TABLE I CONCENTRATION OF PERFLUOROOCIANOA_TE_ IN BLOOD la) SanpIe PRAL No. Date Sampled ~ ~ T . R . ~ N o~.~ 81-4209 81-4210 81-4211 81-4212 31-4213 81-4214 9/3/81 9/3/81 9/4/81 9/4/81 9/4/31 9/4/81 4409 3613 4479 757 4191 4275 CC Analysis Dat_e_ Analyzed 9/30/81 10/1 & 10/2/81 10/1 & 10/2/81 9/30/21 9/30/81 9/30/81 (b [Cr ], eg F/g blood 0.12 4.8 4.2 0.54 0.43 1.0 (a) Analysis as described in Lab Method ES-567 ("Determination of Perfluorooctanoic Acid in Blood, Gas Chromatographic Method", S. Stafford, 4/3/81), using the packed column GC analysis with perfluoro-n-octanoic acid as calibration standard. (b) Although the analysis is specifically for perfluorooctanoate (acid or salts), concentrations are given in ppm fluorine for comparison with the results of total organic fluorine analyses. (ppm F = 0.688 x ppm perfluorooctanoic acid) Estimated uncertainty is + 10% relative standard deviation. The lower limit for quantitation is 0.007 ygF/g. The detection limit is ^ 0.004 vgF/g, but concentrations in that range cannot be well quantitated and are reported as [cg]< 0.007. None detected (n.d.) is reported for samples with < 0.004 ppm. which cannot be distinguished from reagent background. ^ *REDACTED* 000153 EXP000060 EID713874