Comparison between Headspace and Aqueous Phase Solid Phase Microextraction Method for Speciation Analysis of Butyltin Compounds in Sea Water
MENG-PEI HSIA1, TAU-BEING HSU2 AND SHIU-MEI LIU1*
1. Institute of Marine Biology, National Taiwan Ocean University, 2, Beining Rd., Keelung City 202, Taiwan, R.O.C.
2. Deapartment of Water Resources and Environmental Engineering, Tamkang University, 151 Yingjhuan Rd., Danshuei Towship, Taipei County 251, Taiwan, R.O.C.
(Received: December 3, 2003; Accepted: March 22, 2004)
ABSTRACT
Headspace and aqueous phase solid phase microextraction (SPME) mehtods for the analysis of butyltin compounds in sea water were evaluated and compared. The method detection limit (MDL) for monobutyl- (MBT), dibutyl- (DBT), and tributyltin (TBT) in sea water were detected as 3.5, 3.8, and 3.8 ng/L, respectively, by the headspace SPME method. On the other hand, the MDL for MBT, DBT, and TBT in sea water were detected as 19.2, 20.4, and 31.7 ng/L, respectively, by the aqueous phase SPME method. Butyltin compounds in seawater collected from different harbors in Taiwan had MBT in the range of 5.5-51.9, DBT <MDL-19.5, and TBT <MDL-7.8 ng/L as detected by the headspace SPME method.
Key words: solid phase microextraction (SPME), headspace, aqueous phase, butyltin compounds, sea water