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Vol. 27 No. 10 (2015): Vol 27 Issue 10

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Optimization and Validation of Solid-Phase Microextraction of Mercury Species: An Application of Experimental Design

https://doi.org/10.14233/ajchem.2015.18990
Wan Mohd Afiq Wan Mohd Khalik
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia
Md Pauzi Abdullah
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia; Centre for Water Research and Analysis, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia
Fouad Fadhil Al-Qaim
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia; Chemistry Department, Faculty of Sciences for Women, Babylon University, P.O. Box 4, Hilla, Iraq
Mohamed Rozali Othman
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia; Centre for Water Research and Analysis, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia
Yang Farina Abdul Aziz
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia; Centre for Water Research and Analysis, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia

Corresponding Author(s) : Md Pauzi Abdullah

mpauzi@ukm.edu.my

Asian Journal of Chemistry, Vol. 27 No. 10 (2015): Vol 27 Issue 10

Abstract

In this study, determination of mercury species in water by headspace solid-phase microextraction (HS-SPME) has been developed. The extraction procedure consisted of screened using factorial design and followed by optimization using two level central composite designs. An optimum working condition was obtained at 22.5 °C after 20 min, pH 4 and stirring rate (200 rpm) with fixed values of salt addition (8.5 mg L-1) and sample volume (25 mL). Extraction was performed by using 100 μm polydimethylsiloxane (PDMS) fiber and desorption time at 1.2 min. Analytical figure of merit showed good linearity with R2 in the range of 0.992-0.994. Limit of detection and limit of quantification obtained were from 0.037 to 0.078 μg L-1 and from 0.124-0.178 μg L-1 for all analytes, respectively. Repeatability and reproducibility were good with relative standard deviation (RSD) < 10 %. Recoveries were obtained in the range of 72-109 % at two levels of concentration.

Keywords

Factorial design Central composite design Response surface Mercury
Mohd Afiq Wan Mohd Khalik, W., Pauzi Abdullah, M., Fadhil Al-Qaim, F., Rozali Othman, M., & Farina Abdul Aziz, Y. (2015). Optimization and Validation of Solid-Phase Microextraction of Mercury Species: An Application of Experimental Design. Asian Journal of Chemistry, 27(10), 3803–3808. https://doi.org/10.14233/ajchem.2015.18990
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