Liquid crystalline polysiloxane polymer as stationary phase in gas chromatography capillary column for the separation of dioxin/furan compounds.
A side-chain liquid crystalline polysiloxane polymer (PS3DBDE1) with high purity and high isotropic transition temperature served as a stationary phase in an attempt to chromatographize the dioxin/furan compounds. The polymer was coated on the inner surface of a 0.25 mm I.D. capillary column by using the static coating method, forming a film with a thickness of df approximately 0.25 microm. A commercial standard solution (US EPA 1613 standard solution 1613CS4) containing polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) was used to test the chromatographic behavior of the laboratory-made capillary column. Two commercial capillary columns HP-5MS (Hewlett-Packard) and RTX-5MS (RTX) were chosen to compare their chromatographic behavior. The results show that by the use of PS3DBDE1 the isomeric pair compounds 1,2,3,4-TeCDD vs. 2,3,7,8-TeCDD and 1,2,3,4,7,8-HxCDD vs. 1,2,3,6,7,8-HxCDD and the same substituted-chlorine number compounds 1,2,3,4,6,7,8-HpCDF vs. 1,2.3,4,6,7,8-HpCDD and 1,2,3,4,6,7,8,9-OCDD vs. 1,2,3,4,6,7,8,9-OCDF had higher resolution than HP-5MS and RTX-5MS as suggested by the column makers.
Chang-Chien
G P
GP
Department of Chemical Engineering and Super Micro Mass Research and Technology Center, Cheng-Shiu Institute of Technology, Kaohsiung, Taiwan. guoping@cc.cist.edu.tw
Lee
W S
WS
Tsai
J L
JL
Jen
S H
SH
D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods; D004147:Dioxins / Q000302:isolation & purification*; D005663:Furans / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D012833:Siloxanes / Q000737:chemistry*
D004147:Dioxins; D005663:Furans; D012833:Siloxanes