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J Chromatogr A ; 1513: 140-148, 2017 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-28750732

RESUMO

In this research, a novel IMAC sorbent with high specificity for chlorine-containing compounds was developed. Ni-functionalized monodisperse spherical mesoporous silica particles of 500±25nm diameter were synthesized and their metal affinity properties were studied with the use of diclofenac as the model substance. The particles were aggregatively stable in the pH range of 3-12. The sorbent demonstrated a high adsorption capacity (0.60±0.06µg of DCF per 1mg of the sorbent) and high adsorption/desorption rate (20 and 5min was enough for the sorbent saturation and desorption of DCF, correspondingly). A mixture of eluents with addition of PFOS providing the almost complete recovery (98%) of diclofenac was first proposed. The monodispersity and the high sedimentation and aggregative stability of the particles provide the formation of a stable hydrosol even under ultrasound treatment which makes the mSiO2/Ni particles suitable for batch chromatography.


Assuntos
Cromatografia de Afinidade/métodos , Metais/química , Níquel/química , Tamanho da Partícula , Dióxido de Silício/química , Adsorção , Ácido Benzoico/análise , Ciprofloxacina/análise , Diclofenaco/análise , Cinética , Microscopia Eletrônica de Transmissão , Porosidade , Espectrometria por Raios X , Temperatura , Fatores de Tempo
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