Calibration curves of the ten compounds were well correlated (r 240.999) within the range of 100 to 25,000 μg L1 for α‐tocopherol acetate and α‐tocopherol nicotinate, 10 to 25,000 μg L1 for α‐tocotrienol and 5 to 25,000 μg L1 for the other
components.