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Polychlorinated Dioxins (PCDDs), Dibenzofuran.s (PCDFs) and Other Polynuclear Aromatics (PCPNAs) Formed During PCB Fires
Dtdlcand 10 froftuor Amt Frtdp on hh SOrh blrthdty
Chriitofftt Rippe. Sielltn Merklund. Per-Anden Bergqvyt end Marianne Htirnoa Drptruneet o f Orfi/iu CTieimmr. Uabefdty ef Ume*. L'mei, Sweden Frcelfff y*th II. 19)3
Abetnct
Seat infill ul Xfi inu here PCI (In* n eoelynd tr PMCMI.
tn u ecddentel PCI An. where elbAM auction tuned with PCI-
flUid auction. PCDFt am (bo iru|*t onlrcWorlmtld eroducre feiwm,
In enorhet apoatoc Sie, probably aimd Or eirnrteal welflnmea.
eolyefilonneied btoMarliiM (TCIFil am the
piadira. bit
milin udmiI of PCDFi ul yolycliioflnited nnexeeIPCPYl) am ila
formid. Thu u tht Bin iepeit whete PCIPi ud PCPYi hem bam ident
ified a ndwiini product! Thant! damucdon of PCI a t reterr
imw lulu |ri no Uddnsaa of femeUM if PCDFt n Mka puiy-
chloitteied product*.
Introduction
The poiychloiinittd Soxlne (PCDDi) end diburaohirane (PCDFt) tn rao write of trtcyctte tromadc compound! atth tbniier chemical, phyucil, bloiopeai end toxkoioglcal properuti. Tht bet* iiruciuret and aumbertng trf ftven In Fig. 1. The number of chlorine ttomt can *iy between one and eight, and the numb*r of poaidonat boraen b quit* Urge. la all theta an 75 PCDDi and 155 PCDFt aad the numbtr of boinon Tot a (men number of chlorine atsmi an firm in Table I.
Some of the compoundl have extraordinarily toxic proper* ilet and ban been the tubjeci of much concern. They an known at highly liable toniamuianti in chtotiMied phencta. phenoxy cldi and in PCIt. They hare alio been tmroteed n eecidenn and mataivi imouciUom Ilka tht Yuaho aeddenu bt Japan la 1968 and In Tiiwm ut 1979, the accident aear Seeteo, Italy la 197$ and m the Love Canal coniroeeny la USA. la 1971. Thin it a pronounced difference in bioiopcei ifTecta betvien
different PCDD and PCDF nomara, A factor of I0*-10- can be found for to ctoaaly related bomen te 3J.7J- and 1J.l.teira-CDO. Tha laoman tth the hithen acute toxicity ete :J 7,*-mrvCDO, 15 J.7J-penu-CDO. 155.4,73-, 155 6.7.1- and l55.7J9-h*CDD. :j.73-teirvCDF. i:.5.7l- and ;5.d.7,B-ptt-CDF and 1554J5- and 75 4 4.78-hrie.CDF. we Fit 3. All iheee women here their four lateral poutiona tubetiluted for chlorine, and thoy all hare LDifvaluci in the nnp 1-IOOngkl'' for the moet sinmlve animai tpeciet. The tame iiomtrt have been teponed 10 have :hi hijheti biolopcai potency.
The polychlorinated biphenvlenee (PCBPi) 11 another tenet of compound] cloteiy reletid to ihe PCDDt ind PCDFt. tee Fi| | Tht number of PCIP uomert It 75. and one at ihete. the 3 5 6 7.ietra-CBP hat been invettigaied by Poland. The bioiopcil activity ot mu compound u in the tame report at 35.7 8 lewa-CDD |l].
E mutton uom municipal wattemcineraton.healing faciiitiet
Ftp 1. Stnetare and Mmbertne if the pehnhiaiiMtid dleelw iPCDDe) eWerusfuiaa (KDFi) tod bWheeytentr iPCBPu
and thermal poemr plant! hare long been the tubjici of public concern. Whitreei prowouely the cmWon of dun. make,
toxic nettle end noxloue gaaet * of prime concern, the pretence of poitniiilly hmrdout orpnlc compound] hai oniv tecentfy beta reported. The polynocietr tremetx hvdrocarbont (PNAe) wu the Am group of compound! to be diieutwd.
In 1977 Lahaniath r of. reported on the finding of chlottdated organic compound! In the fly eah of e municipal incmertor. The compound! detected were chlonneree tllphttict and bentenet, pcetkidce end PCIt (3] Alio in 1977 OUe it M.. reported on the occurrence of PCDDt and PCDFt in ihi fly uh of three municipal incinerator! In the Nethtiiindt. Their retain Indicated the pietenci of up to 17PCDD bomen. bui no quantlflcauon or bonier identification u pv*n (51
Tibia i. .YumPer of fCDO md KDF tsomtn for t ttrttin numbtr ofcklonnt ttonu
PCDDi
PCDPi
DiTii-
FtnuHiq* HemeOcie-
Teul
1 10 u 1: 14 10 1
i
Ti
4 It :t it :t 16
1 J
Ul
Citmiet Stnptt 20
MONS 214017
ic@,:a i
a
Polyaudtar Aromanet (KPSA t) FormrO Durmt PCS Fires 5 7
3378't*lr9-COO 13378'**!*<DO >33*78'Ho,,o<00 >33 78 -r*aro <00 13379 9-m txo-CDC
CJ
337a-r,tra-cor
13379-manta-COr
Ftp 1 The man tone PC9D uii KDF Mam.
c; ci 133*78+1mw-COF 3*4 78+lro'CQr
A( ebour the iwnt time. wa even engaged la in investigation
This staiamant has later baan confirmed by two accidental
on tht occurrence of PCDDi. PCDFs and other chlorinated PCI fine in tnnifoimer nations, cm in downtown Toronto,
compound! in fly ash and toot of an industrial hatting facility Canada (It] and tha othar 70 km N Stockholm. Swedea (12).
in Switzerland. Later tha itudy ni expanded to include fly In tha Swedish study a 50*100 fold Incmis m tha lewis of
ash of a ir|r municipal Inctnarator. Tha analytat wan carried PCDFs wa observed. but the analytical technique used did not out by high nsoluuon GC macs speclroacopy allowtni idtati- flow tha idanttflcation of Individual PCDF Isoman.
flcation and quantifleatton of tha major PCDD and PCDF
In the ptasaat study, wa report on tha inalysts of toot
components [a-4] In racant yaan amUon from tncinamon samples ind wipe taaii from turn PCB ftras and from t study of hava batn analyzed In tha Netherlands. Italy, Canada. U.S.A.. tha thermal destruction of PCI ~
Germany. Switzerland and Swwdan fT], Dua to iamp!in| dif ficulties. fly aih lamplat hava baan much mora fraqusmty Amiy*t of met lewis ofKDfh mi KDFt
analyzed than flua gas, particulate and othar products from tha Dua to tha extrema toxicity of soma of tha PCDD ind PCDF
incmamot. Tha quantitative nailts an normally ftvan la tarms isomen, vary sens!ore and highly specific analytical techniques
of levels of groups of isoman with tha tama number of chlorine art requited. Detection levels ui biological and environments!
atoms Th< total 1avail of PCDDi and PCDFs are in tha range of samples should be orden of mtptituda below she usual detection
it]. UmiU obtained in pesticide snalyiis A leniitivtty of 1 pg A datailad InvesUgauon of tha specific itomart piaaant In fly (KT" |) might ba required to detect tha most toxic isoman
uh lamplat shows that in general tha known tonic PCDD isoman (sea Fig. 2) in t 11 sample (I ppj 0 001 ppb). Tha dlffetent
wart prrunt only motor coruuntancs. Oa tha contrary, tha iaoman of PCDDi and PCDFs u known 10 vary frailly in ihetr
moat toxic PCDF isomers wait praamt u major constituents in bioiopcal and toaicoio0cal props roes ind therefore tha ispat
theta templet [a, 5], Tha reeultt in these investigations also atlon. tdantlflcatlon and quanmlfaction of tht most toxic
Indlestci that commercial ehlorophtnoi* are tha main pracuraon isomers becomes important.
to tha PCDDt found, raa Fla, J. Oa tha othar hand the PCIt ua tn latent yaan a number of analytical methods have bean
tha main precursors to tha PCDFt found In tha fly ash samples developed for tht trace analyses of PCDDi and PCDFs In a
and also in tha Yutho rtea oA (4, Jj,
variety of matrices including soot ind othar products from
A poiubia contamtniQon of PCBPl in tha Yuaho rice otl, in incineration and accidental Arts Tha most specific snd nItems
used PCBt and in pyrolytad PCBs has baan invtttiiated by of these methods art utilizing mass spectroscopy MS [15, M|
Buwt rr tL |)|. Tha PCBPl could conceivably be foimad from Tha purified extracts from tha clean-up wets used tor tha final
PCBi at ht|h tampanturat under sxetusien of oxygen, tea Fig.
5 However, no deAnita proof for tha pretence of PCBPl at any
ugniflcam level (> JH relative to tha lava! of PCDFl) could
be lound (S|. Tha presents of other chlotlnaiad polynuclear aromatics iPCPNai) In tamplat from incineration processes
eCe
has never been discussed or demontiraied.
We hive previously studied the pyrolvtlt of PCBi When
kommetctil mutturrt or well defined isomers ire heated in air
tn i sealed ampoule, the yields of PCDFs art normally in the
l-SG ante, and this method has successfully bean used for the
preparation of PCDF standards [5, 9 10| These observations
indicated that anv burning of PCBt can baan important envtron-
-nental lourte ot the hazardous PCDFt. and already tn 19TB wa
declitsd that aJI degradation and disposal ot' PCBt should be catelullv controlled in order to avoid accidental formation of
CI^
hazardous PCDFs [9|.
Ftp J Fernianen si PCDOs hCDft ind PCBP' er pnoiyHc proctuei
HONS 214018
18 Oinslofftr Rapp*. Sltllon Markiund, far-Andin Btrjpvm and Manmni Hanston
aniiytii mint M|h-tetolution fu chromato(riphy-mati tptctrornetry Mu* wleetiv* detection (mu* frapneniopiphy) u uaed 10 di*ci PCDDi *nd PCDFt by telecav* monitonni of M M + 2 and/or M + 4. Th* MS-lnatrumem 1* operutini In th* electron Imput (El) or th* updn ehmieJ lomudoa (NCI) mod*. Th* quandfleet! on ii bu*d on p**ic area mMsurcmenu tnd companion either with Internal itandarda or calibration curvet of euthentie ttandardi (external uandardi),
Experimental
Sanction and elaan-up
Th* tamplt (loot umpl* or Kl**n*x Haw* from wipe tttti) wtj *pik*d with Ippb of 2J,74-"Ci1-(*ir*-CCO, 2,i,7,|.*''Cl** ttiroCDF utd rCl,-ti-CDD Th*rttfl*r th* umpl* 1* tmied with 10 ml of I M hydrochloric acid for on* hoar (ahaJdni). Th* ilurry *u flltcrtd by tucaon of * Buchner fttiuwl, werfted with wtttr, utd dried in th* *lr.
Th* drf*d material wu transferred to Soxhlet entneto* and extracted with toluene (tboat I00ml)for*8ht*p*tdof 1-2 ml mln". Th* toluene *u mporutd until lOOttl on * rouvipor with tom* *xt*mii he* tint th* r**t of th* tolvent *u eliminated by t purified Njfluah withoat external htbdag. Th* mlduu wr* dtuohrtd In 2 ml of n-hexafl* tnd added to Silica |*t column prepared from 0-51 of KJe*l|if (0. 70*230 mtih (Merck) eluted with 5 ml of n-h***n*. Th* boxan* wtt evaporated until lOOul utut| t itrtan of nltropn *nd 2ol of thii idudoa wu u**d for eh* aaelyni of PCBfL Th* FCDDi tnd PCDFt wtrt wptrtttd from other polychJorta*t*dbnpurltiet uunp in Alox<olumn (I.Of b*nc Alox aktft. I. Wodm. ICN Writ Germany). Th* Ant fraction, 10 ml-hexanc- methyl*#* chlond* (98:2) wu dieeharfed. Th* wcond fnctlon. 10ml n-hexan*. m*ihyten*eWorld*(I I)wucollectedtndevaporated until dryncu in t itnim of nltrofra. Th* midu* wu dJoolmd in * known amount of aohrent (lOOid) and 2*d wu u**d for th* CC/MS analya**
HitH-moiution tat chromarepaphy-matt tpactromatry
W* have utd two flaw capillary colorant, on* 2J m SE J4 (Ld. 0 J* mm) and on* 55 m Siler 10 c (Ld. 0.26 mm). Th* CC condjtioni ar* rummartztd In Tabt* 11. Th* coiuniM m attached na an open apllt and 0.3m of a heed ribca column directly into th* ion toutc* of th* MS. A Flnnlpa Modtl *421 mau tp*ctromi*r wu uatd op*ndn( in th* El or NCI mod* tCH.),* Table 111
Standard! and rafwtmt Compounds
Ta''', III Mail aptctntcopv condirioni mad in rkt trudy
Eltctmn pneiyy Emmie* nimnt
Elutroe m*ltlplr*T $*iuMiy Hlpi vacuum Forfprftjurv M*n
Innaer temp. Mutfnl* ump.
Tianniti** Um leap, liuathn Ha* iwnp.
El
70 fV >4 oA Ukv to"* AV" J * 10'* isn o oi ion :70`c wc 370-C
arc
NCI
110 v 34 mA 13 kV I0-* AV 1 * 10" ton 0 JO left II0*C no*c 170'C atre
bun ducifbod Ktawhere f|J, 15. 16). No ttandardi wr* tvailaM* for moao-, dl and trhCDFi. a tolutlon of 23,6,7. utioCBF wu obtained from Dtdd Stalilm, Columbia. MO
No other qualitative or quantitative PC1Y or PCPY tundtr* art avatltMt.
Individual MS-rttpona* facton hiv* bwn d*t*imind for 28 dMfbnat PCDFt [I6J, and w*r* uud for th* quantification of thta* Aomen. For unidentified i*omn th* retponj* facton for 2J,74'i*tm- and 2J,4,7ll*penteCDF wu uud.
Accktantal KB Art, SkS*da, Swtdan
In Much 1982 Ar* brok* out In a capacitor battery (*00 V)
unta| * hi|b frequency o**n In t cutiaq Un* of a m*ul treat ment fectory In SkOvde. Sweden. Th* dMltctneum In th* captcitofi condued of mineral oil or PCS and th* rwo type* of capuiton were mixed at madam Th* Ar* ttaned in a capacitor containint mineral dl. and about 2 h tlepud until the An wu completely txunptlahed. Th* capKitor room dcutated In th* beeement of the foundry wu burned out. the coppoi ban for eltctneiiy In the ceiltnt wu partly mtltid (m.p. 1080* CL The nnofc* tpnad in th* bulldlni in m ana of AO x 10 m.
Th* capacitor battery contained 21 capuiton Ailed with PCI (3 kf tuh) An inipector after the Art ihowed 12 of ihei* capuiton had been opened md 9 of them were lull waled.
The foOowui| templet were analynd (wipe itt, Kleenex tnaoe, 1 dm').
(1) On the floor, In th* capuitor battery. (2) On th* floor, clou to th* capuitor battery (1) On the wail In th* caputtoi room. 2 m from th* etawnor battery. 1 m abov* th* (loot.
Thi PCDD and PCDF ttandardi uaed (totri- to octaeWoro) have
Tibi* IV Lcrtis ofKDFt (nfm~')fortamp/tt jrom thtSkordt Tibi* II Cat eAnomerojnephv condition atad *i iha ttudv An
Column. lOAfih Colvmru i.4 Ini.rfac* Jvn*ta IntiTfici. l4. Pmsuri hdUuml InfKior \tmp Ttmp pfOfrvn
r
SC 54
am ' 0 34 mm OJ m 0 14 mm tl pu ijo'c I0`C-: nun ao-litre :r/mui 140-:i0"C IVmn lire* 1 Omw
SUnrlOt
11a dJiaun 03 m 0 11 mm 31 pU arc irc-i m w-iio-c :r/m I*0-J40*c r/min J40*C-10ma
fOF
33 7 S.T.in<9F Tout TrtnCOFt ToulF*nif*OF Total HtuOFl Total H<|uOFi Octa-CDf
12J
30 100 < 1 100 too < j *0 I0O n 4 40 40 A 4
1 44 i 1 n4
n.4 * ChiTrtnt >Mmrs iMn th** fauft4 t* urn ^In I ifld *
4
4d 10* Ai ft d ft 4 ft 4
ONS 214019
"I /" va r ,r*j
Fit t Mim ft
ffOPi) of ntnci from icctetiui PCI Are.
(4) On i banch 10 m Cram tit* wm.
Th rtnilu w coUaetad in TiMt IV. Th# multi thow tht
hipi l*v*la of FCDFi (> 0 1 M*m'') could only be found In in
iru clow to th fin. At t dillwet of 10 m th* level* w*r
about 100 time* lower. Th# low Imli In iiinpl* number J can
b* explained by the hi(h temperature at thia tamptw location
(th* copper bar paitfy m*tt*d ban).
`
Th* frapnmtofnm of the'FCDF* (tr^CDFi to octa-CDF) la
ihown In Ftp, a, Matani th* aaaumpoan of in *qnal response
for tn- and tetre-CDFa, th* level* of tibCDFt la about tha am*
at tun-CDFa. Th* hlpWy tonic :j,7,|.t*u*CDF la on* of th*
major utraUTDF itanm.
'
In additional to th* FCDFa Flp 4 thowt th* pt***nc of
another t*n** of ehiortnatad compound*. Th* molecular *ot|hf*
and number of chiortn* atom* Indicate that this Mtt*a la th*
potychlonnatad pyion**, th* FCFYa, at* FI*. 1. Etpectally th*
dhCFYa an th* domuianUnt compound! at man 270. However,
th* final proof cannot b* obtained due to lack of tyndutk
tandardi. It can be noted that no FCDDa and no FCSPt could
be idenofled in th* lamplea from thi* flit.
Attfdtntal KB fin. Stockholm, Swtdtn
In Aufuit 1911 a fin broke out tat a capacitor battery (10 KV) in in tiectncai power station la Stockholm, Sweden. Th* fli* w*t probably cauaed by malfunction In tha electrical tyrant.
c^-ee
Wc have anatyicd a wipe ter from thli flru takae about I m from th* apecMor. Flstt we analyud th* rxtrvet after th* tiUea |*l tt*p. m Fig. 5. In eddldon to th* FCBi, which wen not totally removed from (he ample, the chromatofnm contained teveral other peak* Inapactloa of th* complat* mm spectra rv*al*d the** p*aki to b* a setto of compound* with a molecular weight cormpoadlnt to dh, trt>, i*tn- ud pent** CBFv Tha nrica h probably formed by a dlrtct eyeIllation of FCB*,se*Flp ).
In Pip * we hm codeettd tha fiaptmtovani of th* Iona cormpoadlnt to d- to peaa<CBTb. Several toman could b* found within each poup. Th* abttne* of synthetic ttandardt cmiu a problem for the identification. but th* pmtnc* of KBFi (o* th* tomflc polychlorinated tctnapthylrnei) could b* checked by fbUowint th* M *nd M + 2 men For moat of pmka in Flp 6 we found th* tapected ratio b*tw**n th* M and
M + 2 lorn. Th* mw MS/MS technique [17) provide* another pouibdity
to check for th* ptwenet of FCBFi. W* hive uMd thn method to analya* for th* tettfrCBFL We have ua*d thn mithod to analyte for th* tetraCBFl (m/r m 2B4) wh*rt hifh l*eli of tetrachioro FCB 1mft 390) could imtrfirt. W teltcitd US' a* th* parent Ion tcannlnt for dauthur ion*. From th* lynthetic ttandard 2 J,6.7-ttra-CBP w* found 25J' and 211* to be th* major duupliar lent. The MS/MS trrperlmenr la ihown in Ftp 7 AD th* major peak* kt th* tatnet had th* rxpactrd daupittr km*, th* number of retiwCBF ucrttirj found in thia tampie wai
abou 10.
Uu
ch^ta t^Xtl I /I
jjL
,^l I ^ 11 li
"3
90m
1 l!
'
Fit 1 Vasa Tnimtnrefnr* rtetal n mtenti of rxtnct from accidrituJ Fit 1 Uui rn(mi(0tnm (MS'MS) of tetrtOPt irsm jcudemu PCI
PCr hie. Stockholm. SwtCe*.
Art, Sioikhulm lUin
HONS 214020
SO Chrutofftr Rappt, Sttllait MarMund, ftr-Artdtn Btrjqvur andMrtmnt Htnuon
Table V Amount! of FCDfrt found bt itmpltt from otctdtnul KB`fin, Stockhobn, Swtdtn
FCDF
Ameum MW
Fit A Mu fri^mnlofna (PCDFt u4 KlYi) of mat hem u*Maw ul FCF On, HUwln.]n>n
The extract from the Aim tup u analyzed for PCDFt (tnd PCDOt) ut th usual wiy. and the quantitative data h given in Table V The level of PCDFt ml found to ba l-tMltn"1 which It approximately two ttnn hifier than in the SkOvda fir*. Howevat, It ihouid bo kept la mind that Id the Stockholm fir* wa ihouid alto cooaider the FCBFi present. a rou|h eettmason pve the levels of PCIPi to be about 23-30mm'*.
Figure S la the ftapnontogtims for the Iona 110 (trtCDPs and di-CFYt) 304 (tatrt-CDFi and t*CPY$) and 340 (pent* CDF* tnd tatre-CPYa). The highest levela were found for the teira-CDFs and the tri-CPYs.
Among the PCDFt wo ean Identify a number of iaomeia. The highly toxic U,7,k-ietm-C0F and 2J.4,7,g-pm-CDF could both be identified as mafor peaks. It ihouid be noted that individual response (acton (ld| have been used to cal culite the levela given in Table V.
Thermal KB dturuetlea, rotary emeut Ubt, Norway
We have analvied a tones of Hmplei taken during a teat ttudy of thermal deactmcdou of PCI a maty cement Ula m Sonny The kiln It 130 * long with a diameter of 3 J m. It hea e to called "wet'* oven operating at 1*JC*C bt the wild material tnd 2000*C In the flamea. During the teat period am' of PCI waa burned at a feeding rate of JOktb**. The remits are cob leered In Table VI
IJ.fJ-TaoelDP M,7J.Tti*CDP IJAJ.TrufrCDF l,4JJ.Trt<3>F 2i44.7.Tat*wDP J.U.l.TvtmCDF UJ.7VUJ.PCDF Other TeuwCDPa
TelaITtUeCDFS
2J,4.7idSmOF UJ.TJ Paata CDF UJi.lrtmaCPF Uj.Tj.PanCW 3J.4J,T.feweCDf U.4 JJ-Ptw*CDF 1 J.4,7 JVwmCDF UJJ,74*wa<tF U.4JJ Pin CPF IJ.4 JJ Pen CPF UJ.7JVUJ.4JOP OUMthmwCSPt
TmelftetiCDFt
Tetai HoaCDPi
150 ISO 111 TJ )7
7J 100 710
1300
41 11 11 11
7J 11 )J U 11 1 11 If
171
<0J
No PCDPi or PCDOa eeaid be found in any of rhe umples. but la three of die aamples wa found tracta of tetrachlonnatod biphenyls.
A comparison of the SUhdo Art with the Stockholm Ate thowa that these two PCI Area produced quite different product*. The Skbvde Art b a "normal" fire where mineral oil pnerared the heat. The motor products formed here ate PDFt and PCFYt, white no PCBPa could be Idendftcd.
The 5teekhobn Am wet caaaed by an electrical malfunction. The temperature in this Are wit probably much higher than in SUtode. In this Are the PC|Pl wen the major products while PCDFt and PCPY* were minor constituents.
Table VI. Amcmnti ofKDFi wtd KDDt found bt KB dtirrucrkm
CmOmbu or*
XAD-1 Filer 1 el'*
XAD-1 FUmi I
g*-
TnCDFt TRICDOt
T.inCDFt Ta<bOi
FmilCDFl hmi^DOr
KrrsCDF, Hru<DDt
Hapu-CDF* HtpuCDDt
OiiaCDF OcU-CDD
<0.04 <0 1
<03 <0.3
<004 <0 1
<2 4 <04
<4 * <0J
<I0 <0 4
<0J <03
<0 1 <0 1
<001 <0.01
<0 7 <0 T
< 1.4 <0 1
<03 <03
<0 Of <0 01
<02 <0.0!
<001 <001
<01 <0-2
<J <0 01
<02 <0 1
Film 1 f
<o.a < i
<( 2 <2.0
<*1 <t.J
<*1 <u
<ti <0J
<u <04
Plm 1 f
<0J <0J
<01 <0.1
<IJ <01
<0 <0.f
<0.2 <0.1
<04 <04
Etecti* (1lt nai1
<1! <12
<13 <10
< 2J <IJ
<3J <:j
<10 <0 J
<0J <0J
Suittdttf ctmcnc
< 300 < J00
<50 <10
<10 <10
< :so < 110
<10 <1
< :.*o < 130
MOMS 21^021
./ c*,
*4 `'J r 4
Another PCB Are occurred in the Stitt Office Butldiat in ' Bth|hun)oa. New York, U.5.A. Aniiyiu of root samples
formed in thli fir* showed the presence of 2J.?.l-teiriCDD
I, OBa. K-. Vtnoaulta. P L, tad Hantaan. 0, Oi,mmp*vw I. * nrn\
* Ittwr. H. R.. beatoardt. H. -f. tM Rjp*,c.. Amitain* 7, it
end other tetn-CODs [il|. However, no dioxins hive been J. tun H. K. bettaaidt. H. -P.. Rapp*. C, tad UndaN. . OtTM
found in the wot from the Swedish PCI Am. This difference
r.sreneri).
can be explained by the presence of polychlorinated btnitntt in tb* ttinsfooner ott la Biofhamton. It hat twin shown by Butet this PCDDa and PCDFs are formed durinf the pyrolyta of poiychioonated bentenm (19],
Two new elassea, the PCBPt and PCTYs war* reported for the Ant dm* in that* urn pita,
Thi data from the PCB test buminf ladkate that this might be a safe method for the destruction of the PCS. now to use la capacitors and trentfountn.
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MONS 214022