title: Development of a fast and selective separation method to determine histamine in tuna fish samples using capillary zone electrophoresis.
abstract: This paper reports on the development of a fast and selective separation method by capillary zone electrophoresis (CZE) for the determination of histamine in tuna fish samples. The background electrolyte was composed of 60 mmol L(-1) hydroxyisobutyric acid and 10 mmol L(-1) sodium hydroxide at pH 3.3. The internal standard used was imidazole. Separations were performed in a fused uncoated silica capillary (32 cm total length, 8.5 cm effective length and 50 μm internal diameter) with direct UV detection at 210 nm. The samples and standards were injected hydrodynamically (50 mbar, 3s) from the outlet capillary end (nearest to the detector) and the electrophoretic system was operated under normal polarity and constant voltage conditions of 30 kV (positive polarity on the injection side). The migration time of histamine in the proposed method was only 0.34 min. The method was then validated and different tuna fish samples were analyzed. Good linearity (R(2)>0.999), a limit of detection 0.14 mg L(-1), intra-day precision better than 3.5% (peak area of sample), and recovery in the range of 94-108% were obtained. The results of the histamine concentration determined in the samples by the CZE method were compared with the LC-MS/MS method.
authors.affiliation: Department of Science and Food Technology, Federal University of Santa Catarina, 88040-900 Florianopolis, SC, Brazil.
authors.forename: Luciano
authors.initials: L
authors.lastname: Vitali
authors.forename: Andressa Camargo
authors.initials: AC
authors.lastname: Valese
authors.forename: Mônia Stremel
authors.initials: MS
authors.lastname: Azevedo
authors.forename: Luciano Valdemiro
authors.initials: LV
authors.lastname: Gonzaga
authors.forename: Ana Carolina Oliveira
authors.initials: AC
authors.lastname: Costa
authors.forename: Marcel
authors.initials: M
authors.lastname: Piovezan
authors.forename: Jacqueline Pereira
authors.initials: JP
authors.lastname: Vistuba
authors.forename: Gustavo A
authors.initials: GA
authors.lastname: Micke
mesh_terms: D000818:Animals; D005591:Chemical Fractionation / Q000379:methods*; D019075:Electrophoresis, Capillary; D005504:Food Analysis / Q000379:methods*; D006632:Histamine / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles; D058610:Isobutyrates; D057230:Limit of Detection; D012015:Reference Standards; D015203:Reproducibility of Results; D012972:Sodium Hydroxide; D014413:Tuna / Q000378:metabolism*
chemical_list: D007093:Imidazoles; D058610:Isobutyrates; D012972:Sodium Hydroxide; C029899:imidazole; D006632:Histamine