A new portable micropipette tip-syringe based solid phase microextraction for the determination of vanadium species in water and food samples

다국어 초록 (Multilingual Abstract)

Simple, rapid and miniaturized portable micropipette tip-syringe solid phase microextraction methodwas developed for speciation of vanadium in water and food samples. Tetra ethylene pentaminefunctionalized multiwalled carbon nanotubes were synthesized and packed in micropipette tip-syringesystem. The surface morphology of adsorbent was characterized, and the effective factors that influencethe efficiency of developed method such as pH, amount of adsorbent, concentration of acid solution fordesorption cycles were studied. The V(V) could be adsorbed on the modified adsorbent surface with tetraethylene pentamine, while V(IV) could not be retained. The assay of V(IV) was based on subtractingvalues of V(V), from total vanadium. The extracted total vanadium and V(V) were injected directly intothe electrothermal atomic absorption spectrometry for analysis. Enhancement factor and detection limitwere found 50 and 0.008 mg L 1, respectively. Accuracy of the method was checked by analysis of certifiedreference materials. The developed method was applied to water and food samples.

참고문헌 (Reference)

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