Abstract：
:An analytical method was developed and validated for the simultaneous determination of four macrocyclic lactones (ML) (abamectin, doramectin, ivermectin and moxidectin) in butter, using liquid chromatography with fluorescence detection. The method employed heated liquid-liquid extraction and a mixture of acetonitrile, ethyl acetate and water, with preconcentration and derivatization, to produce stable fluorescent derivatives. The chromatographic run time was <12.5 min, with excellent separation. The method validation followed international guidelines and employed fortified butter samples. The figures of merit obtained, e.g. recovery (72.4-106.5%), repeatability (8.8%), within-laboratory reproducibility (15.7%) and limits of quantification (0.09-0.16 μg kg(-1)) were satisfactory for the desired application. The application of the method to real samples showed that ML residues were present in six of the ten samples evaluated. The method proved to be simple, easy and appropriate for simultaneous determination of ML residues in butter. To our knowledge, this is the first method described for the evaluation of ML in butter.
journal_name
Food Chemjournal_title
Food chemistryauthors
Macedo F,Marsico ET,Conte-Júnior CA,de Resende MF,Brasil TF,Pereira Netto ADdoi
10.1016/j.foodchem.2015.01.046subject
Has Abstractpub_date
2015-07-15 00:00:00pages
239-45eissn
0308-8146issn
1873-7072pii
S0308-8146(15)00048-5journal_volume
179pub_type
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