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2-45 R E V 12-79
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CC: S. C. C r o f t
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CONFIDENTIAL
B. W. Culpepper - N-11400
L. J . Papa
- 256
PRAL F i l e
- 256
E . I. d u P o n t d e N e m o u r s S C o m p a n y
I.C.
- 323
W il m in g t o n , De l a w a r e 19898
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POLYM ER PRODUCTS DEPARTMENT EXPERIM ENTAL STATION
PPQ
September 21, 1983
PERSONAL CONFIDENTIAL
DR. 0. P. TEDESCO ENGINEERING DEPARTMENT 11 E l 6 LOUVIERS BUILDING
EP 2 21983
CXPR. STATION c e n t s :-:
_________ ANALYSIS OF BLOOD SAMPLES FOR PERFLUOROOCTANOATE (Job No. 831-1046, PRAL Nos. 83-4848-4849; Notebook Nos. E27433,
E29324, E29325)
As requested in your l e t t e r o f 9/14/83, the two blood samples submitted from T r a l e e Park (F&FP) employees have been analyzed f o r p e r flu o r o octanoate (Cg) by the usual gas chromatographic method ES-567. R e sults and sample i d e n t i f i c a t i o n are given in the attached t a b le .
JRW000008
SL:kab Attach.
Key Words
P e r f 1uorooctanoate GC Blood Analysis
Sharron Laas
000236
USEPA 10528
TABLE I
CONCENTRATION OF PERFLUOROOCTANOATE IN BLOOD (a)
CONFIDENTIAL
Sanple__________________ ________ ________
PRAL No. Pate Sampled P.K.No.
Name
83-4848
83-4849
CC Analysis____________ _______ ^ Date Analyzed (Cr ), uz F/g blood
9/16/83
0.17
9/16/83
0.15
JRW000009
(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) 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 pgF/g. The detection limit is 'v 0.004 VgF/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 ppm.
which cannot be distinguished from reagent background.
^
000237
U S E P A 10529
