Abstract：
:A procedure based on liquid-liquid extraction (LLE) and phase separation using magnetically stirred salt-induced high-temperature liquid-liquid extraction (PS-MSSI-HT-LLE) was developed to extract and pre-concentrate ciprofloxacin (CIPRO) and enrofloxacin (ENRO) from animal food samples before electroanalysis. Firstly, simple LLE was used to extract the fluoroquinolones (FQs) from animal food samples, in which dilution was performed to reduce interference effects to below a tolerable threshold. Then, adapted PS-MSSI-HT-LLE protocols allowed re-extraction and further pre-concentration of target analytes in the diluted acid samples for simultaneous electrochemical quantification at low concentration levels. To improve the peak separation, in simultaneous detection, a baseline-corrected second-order derivative approach was processed. These approaches allowed quantification of target FQs from animal food samples spiked at levels of 0.80 to 2.00 µmol L-1 in chicken meat, with recovery values always higher than 80.5%, as well as in milk samples spiked at 4.00 µmol L-1, with recovery values close to 70.0%.
journal_name
Food Chemjournal_title
Food chemistryauthors
da Silva WP,de Oliveira LH,Santos ALD,Ferreira VS,Trindade MAGdoi
10.1016/j.foodchem.2018.01.041subject
Has Abstractpub_date
2018-06-01 00:00:00pages
7-13eissn
0308-8146issn
1873-7072pii
S0308-8146(18)30050-5journal_volume
250pub_type
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