This project is to evaluate new environmentally friendly extraction technology for organic polar compounds in waste water from semiconductor and optoelectronics industry. Two new microextraction methods, stir bar sorptive extraction (SBSE) and dispersive liquid-liquid microextraction (DLLME), were selected for evaluation. The results were also compared with solid phase microextraction(SPME). There are 41 organic compounds selected in this project for evaluation. Analytes including Di-(2-Ethylhexyl) phthalate, Dibutyl phthalate, Butyl benzyl phthalate, Anthracene, Isophorone, Naphthalene, Phenol, 2-Chlorophenol, 2,4-Dichloro- phenol, 4-Nitrophenol, 2-Nitrophenol, 2,4,6-Trichlorophenol, Pentachlorophenol, 1,2-Dichlorobenzene, 1,3-Dichlorobenzene, 1,4-Dichlorobenzene, 1,2,4-Trichlorobenzene, Toluene, Ethyl- benzene, Trichloromethane, 1,2-Dichloroethane, Dichloromethane, 1,1,1-Trichloroethane, 1,1,2-Trichloroethane, Dichlorobromo- methane, Tetrachloroethene, Trichloroethene, 1,1-Dichloroethene, Isopropanol, Acetone, Cyclohexanone, Ethyl acetate, 2-Methoxy- ethanol, Butyl acetate, Ethylene glycol monomethyl ether acetate, Hexamethyl disilazane, Propylene glycol methyl ether, Propylene glycol monomethyl ether acetate, Ethyl ethoxy propionate, Dimethyl sulfoxide, Diethylene glycol monobutyl ether.
The results showed that SBSE extraction can extract those organic compounds at μg/L level. However, those violate compounds with high vapor pressure and very polar compounds are not suitable for this method. The DLLME method is just suitable for semi-violate compounds and nonpolar compounds. When SPME method is used for these compounds extraction, Short fiber life was obstained. The SBSE extraction was selected for real sample test. The PDMS twister was inserted in 10 mL water sample containing 30% sodium chloride for analyte extraction for one hour, the twister was removed then placed in the thermal desorption unit combined with gas chromatography/mass spectrometer for analysis. The project of real samples from the Southern Taiwan Science Park Administration to test the sewage plant water outlet, the samples did not find presence of these analytes, The spiking recoveries were 62%~110%.