Çatak J, Yaman M. Determination of Nicotinic Acid and Nicotinamide Forms of Vitamin B3 (Niacin) in Fruits and Vegetables by HPLC Using Postcolumn Derivatization System. Pak. J. Nutr. 2019;18(6):563–570. doi:10.3923/pjn.2019.563.570