Journal of Advanced Research, Volume (6), No (11), Year (2015-11) , Pages (957-966)

Title : ( Determination of melamine in soil samples using surfactant-enhanced hollow fiber liquid phase microextraction followed by HPLC–UV using experimental design )

Authors: Ali Sarafraz Yazdi , Samane Raouf yazdinejad , Taherh Heidari ,

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Surfactant-enhanced hollow fiber liquid phase (SE-HF-LPME) microextraction was applied for the extraction of melamine in conjunction with high performance liquid chromatography with UV detection (HPLC–UV). Sodium dodecyl sulfate (SDS) was added firstly to the sample solution at pH 1.9 to form hydrophobic ion-pair with protonated melamine. Then the protonated melamine–dodecyl sulfate ion-pair (Mel–DS) was extracted from aqueous phase into organic phase immobilized in the pores and lumen of the hollow fiber. After extraction, the analyteenriched 1-octanol was withdrawn into the syringe and injected into the HPLC. Preliminary, one variable at a time method was applied to select the type of extraction solvent. Then, in screening step, the other variables that may affect the extraction efficiency of the analyte were studied using a fractional factorial design. In the next step, a central composite design was applied for optimization of the significant factors having positive effects on extraction efficiency. The optimum operational conditions included: sample volume, 5 mL; surfactant concentration, 1.5 mM; pH 1.9; stirring rate, 1500 rpm and extraction time, 60 min. Using the optimum con- ditions, the method was analytically evaluated. The detection limit, relative standard deviation and linear range were 0.005 lgmL 1 , 4.0% (3 lgmL 1 , n =5) and 0.01–8 lgmL , respectively. The performance of the procedure in extraction of melamine from the soil samples was good according to its relative recoveries in different spiking levels (95–109%).

Keywords

, melamine , soil samples, surfactant-enhanced hollow fiber liquid phase microextraction,
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@article{paperid:1052911,
author = {Sarafraz Yazdi, Ali and Raouf Yazdinejad, Samane and Heidari, Taherh},
title = {Determination of melamine in soil samples using surfactant-enhanced hollow fiber liquid phase microextraction followed by HPLC–UV using experimental design},
journal = {Journal of Advanced Research},
year = {2015},
volume = {6},
number = {11},
month = {November},
issn = {2090-1232},
pages = {957--966},
numpages = {9},
keywords = {melamine ; soil samples; surfactant-enhanced hollow fiber liquid phase microextraction; HPLC–UV},
}

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%0 Journal Article
%T Determination of melamine in soil samples using surfactant-enhanced hollow fiber liquid phase microextraction followed by HPLC–UV using experimental design
%A Sarafraz Yazdi, Ali
%A Raouf Yazdinejad, Samane
%A Heidari, Taherh
%J Journal of Advanced Research
%@ 2090-1232
%D 2015

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