Solid Phase Extraction of Trace Amounts of Chloramphenicol on the Silica Gel Surface Modified with Octadecyl Groups
DOI:
https://doi.org/10.20535/1810-0546.2016.3.69972Keywords:
Chloramphenicol, Solid phase extraction, Honey, Sorption concentration, ELISAAbstract
Background. Chloramphenicol (CAP) is a broad spectrum antibiotic. It’s widely used in various fields of veterinary and can be accumulated in food of animal origin. A minimum required performance limit (MRPL) for CAP in food is significantly restricted in the EU and the USA. Most modern methods make it difficult to determine the trace amounts of the drug from various matrices without concentration. The method of liquid-liquid extraction (LLE) may be accompanied by loss of trust component. It is therefore advisable to use solid phase analyte extraction to increase the determination sensitivity by instrumental methods and CL withdrawal stability.
Objective. Development of the solid phase extraction method of chloramphenicol from honey, followed by enzyme linked immunoassay.
Methods. Quantitative determination of chloramphenicol was determined using enzyme linked assay (ELISA) test-kit for determination of chloramphenicol in foods, provided by LLC “XEMA”. Solid phase extraction of chloramphenicol from honey samples was studied on silica gel surface modified with octadecyl groups (SiO2-C18), “Agilent”. This method of solid phase extraction was carried out on samples of honey, that previously checked by ELISA using LLE for sample preparation.
Results. Our results showed the possibility of solid phase extraction of CAP on the surface of the silica gel with oktadecyl groups. The optimal conditions for extraction the analyte on the surface of sorbent were found and the eluation condition for CAP was studied. We tested the method of solid phase extraction of CAP from honey matrics on control materials – honey samples with known concentrations of CAP, that were bought by LLC “XEMA”.
Conclusions. Solid phase extraction of CAP could be used for CAP extraction form honey. The proposed method of sample preparation reduces the time of preparation for honey samples. This method is perspective for developing the method of simultaneous concentration of antibiotics from different groups followed by ELISA determination.References
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