Simultaneous Spectrophotometric Determination of Lycopene and Beta-Carotene Concentrations in Carotenoid Mixtures of the Extracts from Tomatoes, Papaya and Orange Juice: Lycopene and ?-Carotene Determination. Pakistan Journal of Scientific & Industrial Research [Internet]. 2013 Aug. 29 [cited 2026 Mar. 10];56(2):90-7. Available from: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/158