Document ppDxkEpBm3r7JddpB51EBJnVd

* U.A. 1/idgoi t - Knabon 2'th December, 1909 I'.C.IU ANMJVSia ItAL/ioch Li.S Tl'cn:!. - St. Louis t r~ K.A. Maxtor, liuubon holier, st. bouis li.A. Youden, um.liou W.li. liieimri!, St. louis Tbn.nL you for your memo on tbc use of b.C.O.T, columns for p.c.b. analysts. Tho chromato, room will be very useful to u* in tho biodegradation study sines wo arc now concerned with identifying specific isomers in 1242 to determine which are the most easily degraded. Your S.C.O.T. clirorautogruns give the highest resolution for 1242 that 1 have seou for low levels, and we eliull shortly be trying to duplicate the:... Our initial results an a well used 90' silicone gum iS230 S.C.O.'f. were not successful - this may have been due to age or contamination, but we have now built on all glass system (h.L.O.T. columns) uud will try ugain. I hnva noli cod that there is little evidence for 1242 in cluronsatograom obtained in the L'.K. on extracts from wildlife residues otc,, possibly because it is degraded and most people are quoting the p.c.b,** found as 1254 and occasionally 1260. Do you find a similar situation in th* li.S.7 U.A, LllXi.flT MOWS 099179 ilOMSF 0X00099147 WATER PCB-00044083