A magnetic multifunctional dendrimeric coating on a steel fiber for solid phase microextraction of chlorophenols
Habib Bagheri, Mahshid Manouchehri, Misagh Allahdadlalouni
Microchimica Acta, 184 (2017) 2201-2209
doi: 10.1007/s00604-017-2220-5
A polyamidoamine dendrimer was synthesized,
placed on magnetite nanoparticles, and the resulting material
was then employed as a fiber coating for use in solid phase
microextraction of chlorophenols. The polyamidoamine was
expected to be an efficient extracting medium due to the presence of multipolar groups and its inner porosity. A thin stainless steel wire was coated with the dendritic polyamidoamine
polymer via electrolysis and chemical reactions. The coated
fiber was investigated in terms of headspace solid phase
microextraction of chlorophenols from aqueous samples
followed by GC-MS quantitation. The calibration plots are
linear in the 2–1000 ng.L-1 chlorophenol concentration
ranges. The LOD values (for an S/N ratio of 3) are between
0.6 and 10 ng.L-1. The relative standard deviations (RSDs) for
spiked distilled water samples (for n = 3) are <7% at a level of
100 ng.L-1. The RSDs for fiber to fiber variations at the same
concentration are <9%. The method was applied to spiked tap
water, well water and Caspian Sea water samples. Relative
recoveries are between 80 and 97%. The method shows good
repeatability, sensitivity, long operational lifetime, and the
fibers are physically stable.