چکیده
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In the present study, graphene oxide nickel-titanium layered double
hydroxide (NiTi-LDH/GO) was synthesized. NiTi-LDH/GO was used
as a fiber coating for the determination of phenolic compounds for
headspace solid-phase microextraction methods in water samples. These
extracted components were introduced into a gas chromatography-mass
spectrometry (GC-MS) injection port for further analysis. The following
analytical merits were used under optimal conditions: temperature of
extraction: 80 ºC, desorption duration: 2 min, extraction time: 40 min,
temperature time: 270 oC, salt concentration: 10% (w/v), 0.01–100 µg L-1
and 0.004-0.09 ng mL-1 for dynamic linear rang (DLR) and limit of detection
(LOD), respectively. The repeatability under optimal conditions for one
fiber (n = 3) is given as the relative standard deviation (R.S.D. %) which
was between 6.5 % and 9.9% for these compounds. The results of the
experiments clearly indicate that the NiTi- LDH /GO nanostructure fiber
is an appropriate choice for HS-SPME of phenols analysis. By combining
HS-SPME using NiTi- LDH /GO nanostructure fiber and GC-MS, low LODs
can be achieved which can be used for determining phenols from water
samples.
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