Xây dựng quy trình xác định nồng độ thấp của hơi hữu cơ Cyclohexan bằng phương pháp sắc khí, ứng dụng cho hệ thống đánh giá phương tiện bảo vệ cơ quan hô hấp

KHOA HQC, CONG NGHE - CHUYEN GIAO XAY DUNG QUY TRINH XAC DINH NONG DO THAP CUA HOI H O U C U C Y C L O H E X A N DANG PHUUNG PHAP SAC KY KHi, UnJG DUNG CHO HE THONG DANH GIA PHUUNG TIEN BAO VE CU QUAN HO HAP CN NGUYfiN KHANH HUY^N Vi$n Nghidn cdu KHKT BHLD Tdm tit: 6a/ bio md ta quy trinh xic dmh nong dg hdi Cyclohexan thap va cao tren thiet bl sk ky GC-9A Xiy dung dudng chuiin d dii ndng thip 20 ^ 200 mg/m3 dexic dinh nong lot qua sau hop loc (nong thip) eija Cyclohexan Xay dung dudng chuan d dai nong cao 200 ^ 7000 mg/m3 dexic dinh ndng Cyclohexan ddng Cic ket qua duoc doi chieu vi so sinh vdi k6t qui phin tich tren miy sic ky GC/FID Abstract: This article describes the procedure or detenmining low and high concentration of Cyclohexane on the GC-9A gas chromatography The procedure includes: establishing a baseline at low concentration ranging from 20 mg/m3 to 200 mg/m3 to determine the concentration of Cyclohexane passing through filter box; building a baseline at high concentration, from 200mg/m3 to 7000 mg/m3 to detennine the level of Cyclohexane in the air flow Results are collated and compared to analysis results from chromatography GC/FID LMU BAU Trong qud trinh lao ddng, nhidu ngudi cdng nhdn phdi Idm vide mdi tmdng tidp xuc vdi cdc loai chat ddc hai, dac bidt Id eac chat hQru co Cdc loai hoi khf ddc hffu CO cd the gdy nhidm ddc cap tfnh tffe thdi hoac mdt cdch td td thdi gian ddi, huy hoai sdc khde NLO, khidn hp phdi nghf mat sdc vd mang bdnh sudt ddi Oe phdng chdng cdc loai khf, hoi hdu co trdn, bidn phdp hOu hidu nhat dd bdo vd sdc khde NLD Id sd dung cdc loai phuong tidn bao vd eo quan hd hap (PTBVCQHH) Ipc hPi khf ddc Tmdc ddy dd ddnh gid thdi gian cd tdc dung bdo vd eua cdc hdp Ipc hoi hffu cP, ngudi ta sd dung Benzen Song Benzen Id hda chat ed nguy eo gdy ung thu d ngudi ndn vide sd dung Benzen ddnh gid thdi gian ed tdc dung bdo vd cCia cac hdp Ipc hoi hffu cP dupe thay thd bang Cyclohexan nude ta, chua cd nghidn cdu ndo de cap ddn vide sd dung Cyclohexan ddnh gid thdi gian cd tdc dung bdo vd cua cdc hdp Ipc hPi hdu cp bang phuong phdp sac ky khf (SKK) Bdi vidt ndy trinh bdy kdt qud nghidn cdu xdy dung quy trinh xdc djnh ndng dd thap cQa hoi hffu co Cyclohexan ddnh gid thdi gian ed tdc dung bao vd cua cac hop Ipc hoi hdu co trdn he thdng ddnh gid PTBVCQHH eiia Vidn BHLD bang phuong p^^p gKK H NOI BUNG VA PHUUNG PHAP NGHIEN CUU No! dung nghien cdu - Xdc dinh ndng dd cao vd thap eua Cyclohexan bang phupng phdp SKK vd phuong phdp trpng lupng qua vide cdn lupng Cyclohexan cd'p vao ddng khf thd nghidm - Ddi chidu kdt qua xdc dinh thdi gian cd tdc dung bao vd cua mdt sd hdp Ipc hoi hffu eo dupe thue hidn trdn he thdng ddnh gid PTBVCQHH cua Vidn BHLD vd kdt qua xdc dinh thdi gian ed tdc dung bdo vd cua nude ngodi Phi/Png phdp nghidn cdu - Sd dung phuong phdp thue nghidm: + Xdc lap chd dd phdn tfch Cyclohexane trdn mdy sac ky khf Shimadzu GC-9A Ndng dd thap cua hoi Cyclohexan dupe xdc dinh d cdc dieu kidn thf nghidm theo tidu chuan BS EN 14387:2004, TCVN 3740-82, tidu chuan Vd sinh lao ddng 2733/2002/QD-BYT sau ddy: • Ndng dd cGa cyclohexan khdng khf (mg/m3): 3500 ±10% 4/2012 B'"••"' AO HO L A O D0NG 15 KHOA HQC, CONG NGHE - CHUYEN GIAO Thiei bl bo lung am • Ndng dd gidi han cho phdp eua Cyclohexan (mg/m3): 34,3 • Luu lupng ddng khf cudn qua 16 binh bay hPi: 153,3 mL/ph r '-3 • Nhidt ddbd didu nhidt: 35,40, 45,50,55°C r SV5 + Sd dung phuong phdp ngoai tj ' 22 svi chud'n vd edn trpng lupng dd xdc SV3 SV4 / -C-' 18 18 dinh ndng dd hoi Cyclohexan vd SV6 SV9 Benzene ddng khf Ndng dd 29 28 danh dinh Ct dupe xdc dinh theo cdng thdc Ct=Am/t.Q (mg/L), dd: Am Id sd miligam dung mdi hiiru CO bi bay hoi thdi gian t (phiit) vdi luu luong ddng khf pha loang Q \ (L/ph) + Xdc dinh thdi gian bdo vd cua Hinh 1: Scr d6 nguyin ly he thdng dinh gii PTBVCQHH loc hai hdu c0 hdp Ipc bang thidt bi ddng life ghdp ndi vdi mdy sac ky GC-9A Thdi 24 Bd Igc hai du 12Lirut6ckg l^dyninkhl gian phdn tfch: phiit phdn tfch 13 Van tiit it/u dp chat dgc 25 Budng gd miu B6 lgc hat 28 Bam mdng 14 LiAJ t6c ke Thiet bl lam khd mau 29 Mdy sic ky 16 Budng tron Van dieu dp + Thdi gian ed tac dung bao vd 30Binht>ayhai 17 Van didn tif 5 Apk^ (T) (phut) tfnh theo cdng thdc: T = 31 Bi dieu nhiet 18 Van di€n tir Van diiu dp vi chinh To.Co/Cct, dd: To la thdi gian 32 Bq dieu khien 19 Van dientu Apk6 22 86 chuyen dong 11 Vanti&luu cd tdc dung bao vd d ndng dd CO (phut), CO : ndng dd tmng binh cua hoi hffu eo tidn hdnh thi nghidm (mg/L), Cet: ndng dd + Thdi gian luu cua Benzen: 2,7 cho tmdc eua hoi hffu co (mg/L) + Thdi gian luu cua Carbon disulfide CS2:1,4 So dd nguydn ly cua hd thdng ddnh gid PTBVCQHH Xdy dung dudng chud'n xdc dinh dinh lupng chf trdn Hinh Cyclohexan: t^- r^ • ' ; > Dudng chuan cua Cyclohexan xdc djnh dupe eac miu cd ndng dd td 20 ^ 200 mg/m^, dudng chuan xac Nghien cdu xdy dUng quy trinh phdn tfch ndng dinh dupe cdc miu ed ndng dd td 200-7000 mg/m^ Ket dd hoi Cyclohexan ddng khf qud dupe bidu didn Hinh vd - Qua nghidn cUu khdo sdt, da xdc dinh dupe cdc didu Dinh li/Ong ndng dd Cyclohexan ban dau kidn dd phdn tfch ndng dd Cyclohexan trdn thidt bi sac ky Bdng cho ta thdy dd Idch giffa hai phuong phdp xac khf Shimadzu GC-9A nhu sau dinh ndng dd danh dinh vd ndng dd thuc Id khdng Idn, kdt + Khf mang: N2 qud vd phuong phdp phdn tfch dat dd tin eay cao + Tdc dd khf mang:~ 30 l/min + Ap suat khdng khf: 0,5 kg/cm^ + Ap sudt hydro: kg/cm^ Bdng 1: M6i quan hi nhiit dd • nSng dd hai Cyclohexan + Detector: FID Ndng thuc Ndng danh DO lech giffa Nhiet ddbd + Nhidt dd detector: 250 "C trung binh bang dinh bang PP 2PPdo,% difiu nhiet, "C PPSKK,mg/m3 + Nhidt dd injector: 200 °C cdn, mgixv? + Cdt tdch: 7GE 221-11368 11 (3,2mm x 2.320 2.261 35 -2,61 3,1m), Moi Sieve 5A 2.820 2.882 40 2,15 3.316 + Nhidt dd cdt: 50 °C (dang nhidt) 3.346 45 0,90 3.614 3.667 + Thd tfch mau bom: l^iL 50 1.45 3.707 3.987 55 7,02 , + Thdi gian luu ciia Cyclohexan: 1,6 m.K£T QUA VA THAO LUAN 16 BSUI HO LAO D0NG 4/2012 KHOA HQC CONG NGHE - CHUYEN GIAO (XIOOO) (X 100000) - 12 (X _ " 0-, Tl ' •3 r: Q _ a D 50 ICO 150 200 230 30( Non? '?\''.iohrv.Tii Uviig do'-'ycl (XlODO) 'lieinii Hinh 3: DUdng chuin xic djnh nSng dd Cyclohexan td200 -^ 7i!7^^ mg/nf Hinh 2: DUdng chuin xic dmh nSng dp Cyclohexan td20 v- 200 mg/rrf 250,00 Cl 140,00 •f, 200,00 E 120,00 100,00 — 80,00 >> u «• •« z - - >> 100,00 o o 60,00 40,00 ^ 20,00 z 0) c - / '8 160,00 lohexan, hexa n E °5) E e' 78 ... cua Cyclohexan xdc djnh dupe eac miu cd ndng dd td 20 ^ 200 mg/m^, dudng chuan xac Nghien cdu xdy dUng quy trinh phdn tfch ndng dinh dupe cdc miu ed ndng dd td 200-7000 mg/m^ Ket dd hoi Cyclohexan. .. khdo sdt, da xdc dinh dupe cdc didu Dinh li/Ong ndng dd Cyclohexan ban dau kidn dd phdn tfch ndng dd Cyclohexan trdn thidt bi sac ky Bdng cho ta thdy dd Idch giffa hai phuong phdp xac khf Shimadzu... Ndng dd Cyclohexan - Ndng dd Cyclohexan Nhdm nghidn cUu da tap trung vdo vide Dieu kidn dau vdo: 3620 mg/m^ dau vdo: 3702 mg/m^ ddnh gid thd nghidm khd nang bdo vd cua hdp ddnh gid Ndng dd Cyclohexan