Document 99Lv45Rj2LL93Dzv2oDR2K7KV

IS,IW, J. P. Mieure - Technology Department - South Second Street October 20, 1970 IMPURITIES IN AROCLOR . R. E. Keller Research 1 ee W. B . Papageorge - GO W. R . Richard - GO M. W . Farrar - Res . 1 H. S . Bergen - GO E . P . Wheeler - CO M. W. Dietrich - Res. 2 E. M. Emery - Res. 2 E . s. Tucker - Res . 2 R. H . Munch - Res. 2 Researchers at the University of Utrecht, The Netherlands, have reported finding low levels of polychlorinated dibenzofurans in competitive polychlorinated biphenyls. They also analyzed Aroclor 1260, lot AK-3, and did not detect any oxygenated impurities. Because of the reported high toxicity of polychlor inated dlbe.<zofurans, a study was undertaken to determine if these, or related, compounds exist as impurities in our products. This memo contains' the preliminary results of this study. Low levels (about 25 ppm) of polychlorinated dibenzofurans were confirmed in Phenoclor D.P. 6, a competitor to Aroclor 1260 from Prodelec (France). Aroclor 5442 appears to contain about 2 ppm polychlorinated dibenzofurans; none were detected in any other Aroclor studied. However, each of the Aroclor 1200 series contains polychlorinated naphthalenes at varying levels. The Aroclor 5442 contains polychlorinated anthracene or phenanthrene. Results are summarized in the accompanying table. The Aroclor 1242, 1254, and 1260 samples are the same lots tested for toxicity by Industrial Bio-Test Laboratories, The method used to determine these impurities is similar to that of J, G, Vos, et al, Journal of Food and Cosmetics Toxicology, in press. The sample was eluted with hexane through a Florisll column. The impurities remained adsorbed on the column and were eluted later with diethyl ether. Qualitative identification was by GC/MS, Quantitation was by electron capture GC and mass spectrometry responses. The concentrations reported are not precise. The quantitative and reproducibility aspects of the separation step could not be thoroughly investigated in a brief study. In addition, due to lack of suitable standards, no response factors could be deter mined for the electron capture GC measurements. All concentra tions were calculated assuming their EC/GC response was Identical to that of 2, 3, 7, 8-tetrachi orodibenzo-p-dioxin. For these reasons concentration ranges, rather than precise values, are reported. .- J. P. Mieure db MOWS 202064 V <cMJKc,)y X+Y ^ 8 /?A*el f2V2 ft/2WS L^r fiK- 2SS me-s.-tent s P.,,r. ^ Iff. a- A/.O. tfjunuJM*o ~T/\j*jtj A/. 15. H*f&ueJj+*4> 7a Qci*^Z /< //.Z>. A/. D. 1 S * O |3^y Lot /IK-It Ta** (t>- 2o j}pm A/.D. rf 12 40 Z -* AK-3 Ta**4 /a*a( -- so <pp^ io* /7/i*eiUt s'/va T>X^cZ-i P.p 6 L^/tt-l A/.D. 7**,, A/. D. - / fOfpp m. A/.D. /S^- as"o pp-- A/.D. , 7~/Uuen nm *7>,2.--~xjS^w @43 i i^r TjCrt.ZZttt p.-rr ,,.tf/__ IO CJUt^^tL^ <L&~ rDic/r*^jLo'Lt^ ^OO^o, xr&*_____________________________ u.tf. A/.D. A/. 0. AJ.U. A/.D. l/.D. W. T>. A/.D. A/.D. A/.O. A/.D. W.D. V W.p. A/D. A/. 0. A/D. A/. D. . A'. R. A/.D. A/.D. s -ao p^> ph. S~ifft> ppH t O-ZQO/pp PH 1 -3 fpp |IH A/. D. A/.D. A/.D. A/.D. T/v**< lS"-3> p^H ~7 a44 -- Au 3 -^ im i^r C<V^C ' M. Z>. - s*wu AttUXtJf f^ZC*>^tLrt < t- 5~?p/m. d*f**~<~*t rw t^t, j4~fS0<t**<Ls NONS 202065