The DART ionization coupled to high resolution MS was incorporated
into a method facilitating convenient, rapid, quantitative
analysis of AFM1 in milk. Optimization of ionization and instrument
parameters facilitated sensitive and accurate determination of
AFM1. LCL (0.1 mg/kg) for AFM1 indicated the potential utility of the
technique. Quantitative analysis performed with the use of matrixmatched
standards employing the 13C-labeled internal standard for
AFM1 in milk extracts gave linear response of the range 0.1 mg/
kg 2.5 mg/kg and good recoveries (94.7e109.2%) and repeatabilities
(RSD 13.5e9.6%) from spiking levels of 0.5 and 2.0 mg/
kg. However, the quality of calibration curves from solvent and
matrix standards suggest the potential of utilization of DART-MS for
quantitation without the addition of isotopically labeled internal
standards. Such positive results from the approach suggest
continued application of DART-MS to development of convenient
quantitative assays of mycotoxins from food and feed related
matrices.