hmal of the Korean ChemicalSocidy 2000, Vol.#, No. 5
Prinkd in tieRepublicof KOIWI
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Analysis of Volatile Organic Compounds Emitted from Chemical Parts and Monitor Set of PC/Monitor
Jong-Woo Choe, Kyn-Won Back, and Chang-Stwp N*
Depa*nt of Chemirfry Keim,yung University Daegu 704-701 Kotea (Received April 26, 2000)
St % PCYMONtOrXW ?2 i% %W?-%%~+Ei
‘? %~% ~~ ’$ i?+ ~~vo~e
CRI@Ccompounds, VGCSW %+4 A]7Lbl] 4% II?%%!%% ~~d%q. ‘~ %7}A -&~71(residual gas malyzer, RGA~ GC-MSS “]%~~ monitoc~]~ %!~~~~$E? ‘$?i?~~ VOC& ‘&d&; ~}%@-~, ‘~x~
=8 WKS * tiluene, cylclohexanone, benzofuran 9 xylerd] ~~~ GC-M= ‘J~~ HI*}9 E}.+&474+, il+%]~~ wedge rubber% 60 OfM]~j 80’= ‘F~& q“ xylen~ ~d%(%)d] 2.5~] 7}%
57}%~z]T+3, L$+x} ~~ VGW+ I&&] $=~ %$T% %% ~~) $$+ ?j@L 97~~~4. RGA
~ GC-M~ ~~-) ~q ‘~~~~ @~ -L ~=] ~?.d~~, ~i%%%j~w cabiue@ xylene
~H} 6029.3~~m3(l.3 ppm~ ~ jzx]~ +++ X3Z, monitor II++414
‘LEN tduew Nene %’
benzofura#] &E@ 7J7# 10.25 ug/m3, 690 @m3, 180 ~7~A)4 l!d%- g~d” ~ ?,k %
+4 ~W %s =%1= +kW.
ABSTRACT. Wlatile organic compxmds(VOCs) emitted from KYMonitor set and chemical parts com- prising of PC/Monitor set were analyzed and emission trends of VGCs on temperature were investigated. Qual- itative analyses of VOCs ‘fromPC/Monitor set and chemical parts were csmied out by residual gas aualyzer(RGA) and GC-MS system and quantitative analysis was achieved for toluene, cyclohexnnone, ben- zofnmn, and xylene of VOCs based on qualitative analysis. As a result of these analyses, when the Wedge Rub- ber of rubber product was heated from W ‘C to 80 “C, the emission rate(%) of xylene was increased about 2.5 times. But it was evaluated that the left of chemical parts wem not affected by temperature except Wedge Rub- ber. ‘Iheresults of qualitative analyses between RGA and GC-MS were a little diffemt respectively. Whb quantitative analysis, concenhation of xylene emitted from cabinet was. measured to be maximum as 6029.3 pg/m~(l.3ppm). ‘f’heconcentrations of toluene, xylene, and beuzofuran derived tiom PC/Monitor set were 10.25 &gfm,690 @m~, and 180 ~g/m3, and these coneentmtions were relatively high levels which can bring on the risk to hmnan health.
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Fig. 1. Schematic diagmm of the gas analysis system equipped withRGAnnd sample chamber,
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Fig. 3.Emission tmxis of VOCS emitted from PCJmonitor set at (a) 20 ‘C and (b) 40 “C.
Table1. TheresulLsof qualitative analysis for chemical pm byRGAon temperature Temperature Chemical Par&s
40
“c 60 “c
80 “CRubber Holder Acetaldehyde (5%) Acetaldehyde (5.7%) Acetaldehyde (4%)
Fhroroethyne ( 12.493)
Cap Boss(rubber) Cyclobutane (12.7%) Cyclobutane (6.7%)
Propane (6.24%) Heneicosarre(3.77%) Heneicosarre (4.24%)
Hydrazine (16.91%) Heptanal (7.16%)
CMomethylene (41%) Chlomethylene (35%) Chloroetbylene (28%)
Wedge Rubber Xylene (30%) Xylene (31%) Xylene (71%)
Ethylbertzene (27%) Ethylbenzene (33%)
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chromatognum of VOCS emitted from chemical parts aud monitor @ (a) Cap Boss, (b) Wedge Rubkr, (c) Monitor set
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Tuble 2. The concentmtions of VOCS emitted from chemical ptis(Cable, Cap Boss, Wedge Rubber, Cabinet and Monitor) Concenbation(Kg!m3)
Compound Threshold MAK
Cable Cap Boss Wedge Rubber Cabinet Monitor Limit (ppm)] (ppm)z
Tohrene t 10.25-2.5 ppb IO-15 lLXI
Xylene 5.6-12 ppb 2100-0.44 ppm t 6029.3-1.3 ppm 690-0.15 ppm 1 100
Benzofnran 180-0.3 ppb -
Cyclohexanone - T 119.5-0.03 ppm t 0.88 50
Note ‘:3j%~%9+7tl~+$7R, I:QIAW AWX=3 ~%+ %!4+%%=. 2%94414 7M=I+”4%FW14 %%a=+%%=.
(Maxima/ AllowableConcentratiooa)
% Chloroethylene, Xylene ~ Ethylbenzene
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Sot.2ooo(ii press).
ZIOO,VOL44,No.5
