Under the optimized experimental conditions, a linear working range was obtained for iron concentrations
from 4.16 to 100.0 lg L1 (R = 0.9996, n = 6). The determined detection limit (LOD) was
about 1.25 lg L1. Six biodiesel samples were analyzed by the proposed methodology, and the
results revealed good agreement with those obtained through a high-resolution continuum source
graphite furnace atomic absorption spectrometry (HR-CS GFAAS) comparison procedure. Relative
deviations lower than 4.5% were achieved, and the application of a paired Student’s t-test, confirmed
the absence of any statistical difference for a confidence level of 95% (n = 5). Recoveries var-