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E. I. du P o n t d e N e m o u r s & C o m p a n y
IN C O R PO R A T ED
W il m in g t o n , De l a w a r e 19898
POLYMER PRODUCTS DEPARTMENT EXPERIMENTAL STATION
PERSONAL AND CONFIDENTIAL
cc: A. J. Dahl B. VJ. Karrh L. J. Papa Pral File I .C.
- 353 - NI 14 00 - 269
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December 2, 1981
TO: DR. J. M. HEDGES - P P D , Circleville FROM: S. S. STAFFORD <>.
ANALYSIS OF BLOOD SAMPLES FOR PERFLUOROOCTANOATE (Job No. 810-633; PRAL Nos. 81-5258-5262,81-5440 and -5441 ___________ Notebook Nos. E22514,E26238,E27432)______________
As requested in your letters of 11/2/81 and 11/16/81 to L. J. Papa, the 7 blood samples submitted then have been analyzed for perfluorooctanoate (Cg) by the usual gas chromatographic method ES-567. Results and sample identification are given in the attached table.
Attachment jah
Key Words: P e rflu o ro o c ta n o a te GC Blood Analysis
000181
EXP000072
EID713886
TABLE I CONCENTRATION. OF PERFLUOF.OOCTANOATE IN BI.OOD (a)
Sample PRAL No. Date Snm.pled
81-5258
11/2/81
31-5259
11/3/81
31-5260
11/2/81
81-5261
11/2/81
81-5262
11/2/81
31-5441
11/13/81
81-5442
11/13/81
P.R.No. 1834 2353 4162 6722 7023 540 4320
Name
GC Analysis Date Analyzed
(Cr ], Ug F/g bio
11/12 & 11/24/81
< .007 (c)
11/12/81
n.d .
11/12/31
n.d .
11/12/31
n.d.
11/12/81
n.d .
11/24/31
n.d.
11/24/81
n.d.
(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 vith perfluoro-n-octanoic acid as calibration standard.
(b) A.lthough 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 lover limit for quantitation is 0.007 pgF/g. The detection limit is n, 0.004 pgF/g, but concentrations in that range cannot be well quantitated and are reported as
< 0.007. None detected (n.d.) is reported for samples with [Cg ] < 0.004 ppn.
which cannot be distinguished from reagent background.
^
(c) marginally detectable.
000182
REDACTED*
EXP000073
EID713887
