A new polyethylene glycol fiber prepared by coating porous zinc electrodeposited onto silver for solid-phase microextraction of styrene

Sakchaibordee Sungkaew; Chongdee Thammakhet; Panote Thavarungkul; Proespichaya Kanatharana

doi:10.1016/j.aca.2010.02.004

A new polyethylene glycol fiber prepared by coating porous zinc electrodeposited onto silver for solid-phase microextraction of styrene

Anal Chim Acta. 2010 Apr 1;664(1):49-55. doi: 10.1016/j.aca.2010.02.004. Epub 2010 Feb 12.

Authors

Sakchaibordee Sungkaew¹, Chongdee Thammakhet, Panote Thavarungkul, Proespichaya Kanatharana

Affiliation

¹ Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.

PMID: 20226931
DOI: 10.1016/j.aca.2010.02.004

Abstract

A new polyethylene glycol fiber was developed for solid-phase microextraction (SPME) of styrene by electrodepositing porous Zn film on Ag wire substrate followed by coating with polyethylene glycol sol-gel (Ag/Zn/PEG sol-gel fiber). The scanning electron micrographs of fibers surface revealed a highly porous structure. The extraction property of the developed fiber-to-styrene residue from polystyrene packaged food was investigated by headspace solid-phase microextraction (HS-SPME) and analyzed with a gas chromatograph coupled with flame ionization detection (GC-FID). The new Ag/Zn/PEG sol-gel fiber is simple to prepare, low cost, robust, has high thermal stability and long lifetime, up to 359 extractions. Repeatability of one fiber (n=6) was in the range of 4.7-7.5% and fiber-to-fiber reproducibility (n=4) for five concentration values were in the range 3.4-10%. This Ag/Zn/PEG sol-gel fiber was compared to two commercial SPME fibers, 75 microm carboxen/polydimethylsiloxane (CAR/PDMS) and 100 microm polydimethylsiloxane (PDMS). Under their optimum conditions, Ag/Zn/PEG sol-gel fiber showed the highest sensitivity and the lowest detection limit at 0.28+/-0.01 ng mL(-1).