Palladium-coated stainless-steel wire as a solid-phase microextraction fiber

Min Sun; Juanjuan Feng; Yanan Bu; Xiaojiao Wang; Huimi Duan; Chuannan Luo

doi:10.1002/jssc.201401283

Palladium-coated stainless-steel wire as a solid-phase microextraction fiber

J Sep Sci. 2015 May;38(9):1584-90. doi: 10.1002/jssc.201401283.

Authors

Min Sun¹, Juanjuan Feng¹, Yanan Bu¹, Xiaojiao Wang¹, Huimi Duan¹, Chuannan Luo¹

Affiliation

¹ Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China.

PMID: 25726925
DOI: 10.1002/jssc.201401283

Abstract

A novel palladium solid-phase microextraction coating was fabricated on a stainless-steel wire by a simple in situ oxidation-reduction process. The palladium coating exhibited a rough microscaled surface and its thickness was about 2 μm. Preparation conditions (reaction time and concentration of palladium chloride and hydrochloric acid) were optimized in detail to achieve sufficient extraction efficiency. Extraction properties of the fiber were investigated by direct immersion solid-phase microextraction of several polycyclic aromatic hydrocarbons and phthalate esters in aqueous samples. The extracted analytes were transferred into a gas chromatography system by thermal desorption. The effect of extraction and desorption conditions on extraction efficiency were investigated. Under the optimum conditions, good linearity was obtained and correlation coefficients between 0.9908 and 0.9990 were obtained. Limits of detection were 0.05-0.10 μg/L for polycyclic aromatic hydrocarbons and 0.3 μg/L for phthalate esters. Their recoveries for real aqueous samples were in the range from 97.1 to 121% and from 89.1 to 108%, respectively. The intra- and interday tests were also investigated with three different addition levels, and satisfactory results were also obtained.

Keywords: Gas chromatography; Palladium; Phthalate esters; Polycyclic aromatic hydrocarbons; Solid-phase microextraction.