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Determination of ochratoxin A in coriander (Coriandrum sativum L.) by HPCL/fluo...
Lino,Celeste Matos; Baeta,Lurdes; Pena,Angelina Simões; Silveira,Irene NoronhaAn analytical study based on extraction with acetonitrile-water, immunoaffinity column cleanup, and HPLC/fluorescence detection for separation and identification of ochratoxin A in coriander was carried out. Validation of the applied methodology was done through accuracy and precision studies. Homogenized samples of coriander were spiked in triplicate with ochratoxin A at 0.5, 1.0, 2.0, and 5.0 µg/kg levels. Re...
Methods for the determination of organochlorine pesticide residues in human serum
Lino, Celeste Matos; Azzolini, Clara B. Ferreira; Nunes, Domingos S. Valente; Silva, José M. Rocha; Silveira, Maria Irene Noronha daThe effectiveness of solid-phase extraction with Florisil for the determination of 12 organochlorine pesticide residues from human serum was examined. Recoveries greater than 84% and coefficients of variation better than 19% were obtained. Others methods, such as column partition and matrix solid-phase dispersion, were compared. The better method provides quantification limits ranging from 1.08 [mu]g/l for [gam...
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