Vitamin E analysis in green vegetables is performed by an array of different methods, making it difficult
to compare published data or choosing the adequate one for a particular sample. Aiming to achieve a consistent
method with wide applicability, the current study reports the development and validation of a fast
micro-method for quantification of vitamin E in green leafy vegetables. The methodology uses solid–
liquid extraction based on the Folch method, with tocol as internal standard, and normal-phase HPLC
with fluorescence detection. A large linear working range was confirmed, being highly reproducible, with
inter-day precisions below 5% (RSD). Method sensitivity was established (below 0.02 lg/g fresh weight),
and accuracy was assessed by recovery tests (>96%). The method was tested in different green leafy vegetables,
evidencing diverse tocochromanol profiles, with variable ratios and amounts of a- and c-tocopherol,
and other minor compounds. The methodology is adequate for routine analyses, with a reduced
chromatographic run (